Daikin VRV IV+ Service Manual Download Page 247

Page: 247 / 476

Components

Service manual

247

REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05

Phase

Energizing status

Ф1

OFF

Ф2

OFF

Ф3

OFF

Ф4

OFF

▪

Opening sequence for Y2E andY5E:
Valve closing: 8 > 7 > 6 > 5 > 4 > 3 > 2 > 1
Valve opening: 1 > 2 > 3 > 4 > 5 > 6 > 7 > 8

Phase

Energizing status

Ф1

OFF

Ф2

OFF

Ф3

OFF

Ф4

OFF

Check if the expansion valve is open. Check with a contact thermometer (or by
touching) if refrigerant flows through the expansion valve.

Is the expansion valve open?

Action

Yes

Component is OK. Return to the
troubleshooting of the specific error
and continue with the next step.

Replace the expansion valve, see

"Repair procedures"

[

247].

Problem solved?

After all checking procedures listed above have been performed:

Is the problem solved?

Action

Yes

No further actions required.

Return to the troubleshooting of the
specific error and continue with the
next procedure.

Repair procedures

To remove the expansion valve motor

Prerequisite:

Stop the unit operation via the central controller.

Prerequisite:

Turn OFF the respective circuit breaker.

Prerequisite:

Remove the required plate work, see

"3.15 Plate work"

[

315].

If needed, remove any parts or insulation to create more space for the
removal.

Cut the tie strap and remove the insulation cap.

Summary of Contents for VRV IV+

Page 1: ...Service manual VRV IV Heat Recovery REYQ8U7Y1B REYQ10U7Y1B REYQ12U7Y1B REYQ14U7Y1B REYQ16U7Y1B REYQ18U7Y1B REYQ20U7Y1B REMQ5U7Y1B ...

Page 2: ...the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly rejects any liability for any direct or indirect damage in the broadest sense arising from or related to the...

Page 3: ...e Description Date ESIE18 15 Document release January 2020 ESIE18 15A Document release April 2020 ESIE18 15B See below May 2020 The following updates have been applied to the Service Manual Crankcase heater Check procedures Electrical check updated Inverter PCB Repair procedures Remove install procedures updated ...

Page 4: ...d 42 2 3 23 E9 01 05 08 Electronic expansion valve Y1E malfunction 43 2 3 24 E9 03 06 09 Electronic expansion valve Y2E malfunction 44 2 3 25 E9 04 07 10 Electronic expansion valve Y3E abnormality 45 2 3 26 E9 20 21 22 Electronic Expansion Valve Y1E failure 46 2 3 27 E9 23 24 25 Electronic expansion valve Y2E failure 47 2 3 28 E9 26 27 28 Electronic expansion valve Y4E malfunction 49 2 3 29 E9 29 ...

Page 5: ... 101 2 3 86 L1 05 15 16 Inverter PCB A3P hardware fault 102 2 3 87 L1 17 22 42 Inverter PCB A6P abnormality 103 2 3 88 L1 18 23 43 Inverter PCB A6P current detection primary circuit 104 2 3 89 L1 19 24 44 Inverter PCB A6P current detection secondary circuit 105 2 3 90 L1 20 25 45 Power transistor error on inverter PCB A6P 106 2 3 91 L1 21 26 46 Inverter PCB A6P hardware fault 106 2 3 92 L1 28 32 3...

Page 6: ... 156 U4 03 Transmission error between indoor units and system 161 2 3 157 U4 15 Unable to start test run 162 2 3 158 U7 01 Transmission abnormality between systems DTA104A61 62 error 162 2 3 159 U7 02 Transmission abnormality between systems DTA104A61 62 error 163 2 3 160 U7 03 Transmission abnormality between main outdoor unit and sub 1 outdoor unit 164 2 3 161 U7 04 Transmission abnormality betw...

Page 7: ...orrespond to the setting 199 2 4 6 Symptom The fan direction does not correspond to the setting 199 2 4 7 Symptom White mist comes out of a unit Indoor unit 199 2 4 8 Symptom White mist comes out of a unit Indoor unit heat exchanger unit 199 2 4 9 Symptom The user interface reads U4 or U5 and stops but then restarts after a few minutes 200 2 4 10 Symptom Noise of air conditioners Indoor unit 200 2...

Page 8: ...hecking procedures 337 3 19 2 Repair procedures 339 3 20 Sub PCB 342 3 20 1 Checking procedures 342 3 20 2 Repair procedures 345 3 21 Thermistors 348 3 21 1 Refrigerant side thermistors 348 3 21 2 Other thermistors 355 4 Third party components 356 4 1 Electrical circuit 356 4 1 1 Checking procedures 356 4 1 2 Repair procedures 361 4 2 Refrigerant circuit 363 4 2 1 Checking procedures 363 4 2 2 Rep...

Page 9: ...erview REMQ5U REYQ8 12U units 441 6 4 2 Component overview REYQ14 20U units 443 6 5 Switchbox overview 445 6 5 1 Single fan units 445 6 5 2 Double fan units 446 6 5 3 Branch selector box 447 6 6 Safety devices 449 6 7 Field information report 451 6 8 Service tools 454 6 9 Field settings 455 6 9 1 To access mode 1 or 2 455 6 9 2 To use mode 1 455 6 9 3 To use mode 2 456 6 9 4 Mode 1 Field settings ...

Page 10: ...ination INFORMATION U series units cannot share the same refrigerant circuit with T series units However electrically U series units and T series units can be present on the same F1 F2 OUT wiring for central controller connection Up to 3 modules of VRV IV HR outdoor units can be connected using refnet BHFQ23P Field piping must be thermally insulated copper piping connected to a combination of sing...

Page 11: ...selector BS units each of them available in different capacities Single circuit branch selector units BS1Q10A indoor index below 100 100 NOT included BS1Q16A indoor index from 100 and below 160 160 NOT included BS1Q25A indoor index from 160 to 250 250 included Multi circuit branch selector units BS4Q14A maximum 4 circuits BS6Q14A maximum 6 circuits BS8Q14A maximum 8 circuits BS10Q14A maximum 10 ci...

Page 12: ...s of units a b a c c c k k d n h g i k k k k k k h g j m m m m m m m m e l f f f a VRV IV HR outdoor unit b Refnet BHFQ23P for outdoor multi connection c Refnet KHRQ23M d Multi branch selector unit e Refnet KHRQ22M f VRV DX indoor unit g Low temperature Hydrobox HXY A h Single branch selector unit i EKEXV j Air handling unit k 3 pipes high pressure gas low pressure gas liquid l High temperature Hy...

Page 13: ...s only for reference of compatible units Always refer to Engineering Databook for compatibility Round flow cassette FXFQ Ceiling suspended FXHQ Fully flat cassette FXZQ 4 Way ceiling suspended FXUQ 2 Way cassette FXCQ Concealed floor standing FXNQ Corner cassette FXKQ Floor standing FXLQ Concealed ceiling FXDQ AHU kit EKEXV EKEQM EKEQF Concealed ceiling with medium ESP FXSQ Low temperature Hydrobo...

Page 14: ... history 2 2 1 Via the indoor unit remote controller BRC1H INFORMATION Images are in English and for reference ONLY For more details on the Madoka Assistant please refer to the BRC1H training course material which is available on the Daikin Business Portal To retrieve the error code To indicate a system error the controller displays on the messages zone of the home screen b a c a Messages zone b M...

Page 15: ...or is shown on the home screen e g d f d Active error e Home screen f Error s details g Notifications screen 3 Tap the active error Result The detail s of the error s are shown on the Notifications screen To check the error history To check the error history with the Madoka Assistant for BRC1H Action Image for reference Result 1 Tap the settings icon The Unit settings screen is displayed ...

Page 16: ...y When an error is generated the unit performs a forced off until the error is retrieved On retry the system attempts to stay in operation Depending on the type of root cause after a certain amount of retry attempts the unit generates an error Retry cause is also visible as an item on the service monitoring tool Mode Setting Description Mode 1 Monitor mode 17 Error code last forced off 18 Error co...

Page 17: ... on display Press SET BS2 once again to return to main Malfunction Retry display Main Malfunction Retry item will appear on display Press the RETURN BS3 Button to return to Home Screen for Monitoring Mode Home Screen for Monitoring Mode will appear on display Press the MODE BS1 Button to return to Normal Mode Back in normal mode 2 2 3 Via the wired remote control BRC1E INFORMATION Images are in En...

Page 18: ...1 Go to the basic screen Cool Set to 28 C 2 Press at least 4 seconds while the backlight of the screen is lit The Service Settings screen is displayed 3 Select Error History 4 Press The Error History screen is displayed 5 Select RC Error History or Indoor Unit Error History 6 Press The RC Error History screen shows error history for all units in case of group control The Indoor Unit Error History ...

Page 19: ...t all items of the following procedure 1 short beep conduct steps 3 and 4 Continue the operation in step 4 until the buzzer sounds continuously Continuous buzzer indicates the error code is confirmed 3 Press the MODE button Result The left digit of the error code on display will blink 4 Press UP DOWN buttons to change the left digit of the error code Result The left digit changes as indicated belo...

Page 20: ...ry with the wireless controller BRC4 7 2 2 5 Via the wired remote control BRC1D To retrieve the error code a d e c b f a Remote controller s operation LED b Error code c Inspection display d TEST button e Unit No f Temperature set button If operation stops due to a malfunction the remote controller s operation LED will blink and an error code will be displayed The error code will stay available at...

Page 21: ...2 While in field settings mode press TEST button for 5 seconds Result Mode 40 is accessed 3 Push the temperature set button to change the History No No 1 stands for the latest error Result The History No and error code are displayed g h g History No h Error code 4 Press TEST button to return to the home screen 2 2 6 Via service monitoring tool With the service monitoring tool it is possible to mon...

Page 22: ...nits in the circuit will show U9 error This means There is an error in the circuit but it s not the unit that shows U9 2 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 3 Check if connector X15A is short circuited with a connector Check if this connector is firml...

Page 23: ... units and outdoor unit 4 Perform a power reset If the error disappears and is raised again after a while check for the presence of an external source causing electrical noise See 4 3 External factors 4372 Possible cause External source may cause interference INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 3 E1 02 Outdoor uni...

Page 24: ...y is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 3 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB 4 Using a megger device check the solenoid valve coils 4 way valve coil fan motors and compressors if any earth leakage is found Replace the component ...

Page 25: ... X101A is correctly connected to the main PCB See 3 11 Main PCB 4290 Possible cause Open circuit on connector X101A 2 Perform a check of the current sensor See 3 5 Current sensor 4237 Possible cause Faulty current sensor 3 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still pre...

Page 26: ...anger See 4 3 External factors 4372 Possible cause Insufficient air flow or air by pass due to required space specifications not met 3 Clean the outdoor heat exchanger See 5 Maintenance 4374 Possible cause Dirty outdoor heat exchanger 4 Perform a check of the high pressure switch See 3 9 High pressure switch 4270 Possible cause Faulty high pressure switch 5 Check if the refrigerant circuit is corr...

Page 27: ...efault Via the indoor unit remote controller cycle OFF ON If field setting 2 15 0 Press BS3 on main PCB on outdoor unit and then via indoor unit remote controller cycle OFF ON To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed stop val...

Page 28: ...ill present contact the helpdesk 2 3 8 E3 07 High pressure switch reset error Trigger Effect Reset High pressure switch did not reset and it stays activated Unit will stop operating If field setting 2 15 1 default Via the indoor unit remote controller cycle OFF ON If field setting 2 15 0 Press BS3 on main PCB on outdoor unit and then via indoor unit remote controller cycle OFF ON To solve the erro...

Page 29: ...ssible cause Closed stop valve in the refrigerant circuit 2 Perform a check of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 3 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 4 Check for the presence of non condensables and or hum...

Page 30: ...2 Perform a check of the high pressure switch See 3 9 High pressure switch 4270 Possible cause Faulty high pressure switch 3 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 4 Check for the presence of non condensables and or humidity in the refrigerant circuit See 4 2 Refrigerant circuit 4363 Possible cause Non condensabl...

Page 31: ...he listed order 1 Check that the bridge connector X4A of the main PCB is correctly connected See 3 11 Main PCB 4290 Possible cause Open jumper X4A on main PCB 2 Perform a check of the high pressure switch See 3 9 High pressure switch 4270 Possible cause Faulty high pressure switch 3 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures ...

Page 32: ...ross wired Correct the wiring between the indoor unit s and outdoor unit Possible cause F1 F2 transmission wiring is cross wired with another outdoor unit system 3 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant shortage 4 Check for the presence of humidity in the refrigerant circuit See 4 2 Refrigerant circuit 4363 Possible cause H...

Page 33: ...ger Effect Reset Compressor overload is detected for M1C Unit will stop operating Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed stop valve in the refrigerant circuit 2 Check if the refrigerant circu...

Page 34: ...3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 14 E5 07 08 09 Compressor overload Motor Lock Error M2C Main error code Sub error code Unit E5 07 Main 08 Sub 1 09 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdo...

Page 35: ...e 3 7 Expansion valve 4244 Possible cause Expansion valve CANNOT keep minimum superheat of 3 K while running as evaporator 8 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant shortage 9 Perform a check of the 4 way valve See 3 1 4 way valve 4206 Possible cause Faulty 4 way valve 10 Perform a check of the discharge pipe thermistor See ...

Page 36: ...e Faulty refrigerant high pressure sensor 2 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 3 Connect a pressure gauge to both high and low pressure service ports and read the high and low refrigerant pressure Connect the service monitoring tool to the unit and compare the pressure values to ...

Page 37: ...rform a check of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 2 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 3 Connect a pressure gauge to both high and low pressure service ports and read the hig...

Page 38: ...re is no rpm detection Fan judgement is based on logic by current drawn Unit will stop operating Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P 2 Check if power supply cable to fan motor is NOT loose ...

Page 39: ...rface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the fan inverter PCB A7P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A7P 2 Check if power supply cable to fan motor is NOT loose Check connector X2A on fan inverter PCB A7P See To check the wiring of the fan inverter PCB 3 8 Fan inverter PCB 4259 Check...

Page 40: ...inverter PCB A4P 2 Perform a check of the outdoor unit fan motor M1F See 3 14 Outdoor unit fan motor 4307 Possible cause Faulty outdoor unit fan motor M1F INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 20 E7 06 18 30 Outdoor unit fan motor M2F overcurrent error Main error code Sub error code Unit E7 06 Main 18 Sub 1 30 Sub 2...

Page 41: ...in outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Fan inverter PCB A4P is overheated Unit will stop operating Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the fan inverter P...

Page 42: ...CB A7P is overheated Unit will stop operating Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the fan inverter PCB A7P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A7P 2 Check the required space around the outdoor unit heat exchanger See 4 3 External factors 4372 Possible ca...

Page 43: ...s switched ON the outdoor unit main PCB checks all expansion valve coil windings by current check 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB 2 Perform a check of the Sub PCB See 3 20 Sub PCB 4342 Possible cause Faulty Sub PCB 3 Perform a check of the upper heat exchanger expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty upper heat excha...

Page 44: ...b 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Subcool expansion valve Y2E malfunction Unit will stop operating Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perfor...

Page 45: ...ssible cause External source may cause interference INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 25 E9 04 07 10 Electronic expansion valve Y3E abnormality Main error code Sub error code Unit E9 04 Main 07 Sub 1 10 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main o...

Page 46: ...conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 8 Perform a power reset If the error disappears and is raised again after a while check for the presence of an external source causing electrical noise See 4 3 External factors 4372 Possible cause External source may cause interference INFORMAT...

Page 47: ...rigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 5 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 6 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power su...

Page 48: ...3 7 Expansion valve 4244 Possible cause Faulty subcool expansion valve 3 Perform a check of all refrigerant side thermistors See 3 21 Thermistors 4348 Possible cause Faulty refrigerant side thermistor s 4 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 5 Check if the refrigerant circuit is co...

Page 49: ...ks all expansion valve coil windings by current check 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB 2 Perform a check of the Sub PCB See 3 20 Sub PCB 4342 Possible cause Faulty Sub PCB 3 Perform a check of the receiver gas expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty receiver gas expansion valve 4 Perform a check of all refrigerant si...

Page 50: ...its can be identified by field setting 1 00 Trigger Effect Reset Liquid cooling expansion valve Y5E malfunction Unit will stop operating Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order INFORMATION When the power is switched ON the outdoor unit main PCB checks all expansion valve coil windings by current check 1 Perform a c...

Page 51: ...m is still present contact the helpdesk 2 3 30 E9 31 36 41 Electronic expansion valve Y6E malfunction Main error code Sub error code Unit E9 31 Main 36 Sub 1 41 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by ...

Page 52: ...7 Perform a power reset If the error disappears and is raised again after a while check for the presence of an external source causing electrical noise See 4 3 External factors 4372 Possible cause External source may cause interference INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 31 E9 44 45 46 Electronic expansion valve Y...

Page 53: ...charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 6 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 7 Perform a power reset If the error disappears and is raised again after a while check for the presence of an external source causing...

Page 54: ...efrigerant side thermistors See 3 21 Thermistors 4348 Possible cause Faulty refrigerant side thermistor s 5 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 6 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 7 Check if...

Page 55: ...ain PCB checks all expansion valve coil windings by current check 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB 2 Perform a check of the Sub PCB See 3 20 Sub PCB 4342 Possible cause Faulty Sub PCB 3 Perform a check of all expansion valves See 3 7 Expansion valve 4244 Possible cause Faulty expansion valve 4 Perform a check of all refrigerant side thermistor...

Page 56: ...1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Expansion valve defective circuit Unit will stop operating Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order INFORMATION When the power is switched ON the outdoor unit main PCB checks all expansion valve coil windings by current check 1 Pe...

Page 57: ... still present contact the helpdesk 2 3 35 F3 01 03 05 Compressor discharge temperature too high Main error code Sub error code Unit F3 01 Main 03 Sub 1 05 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field...

Page 58: ...4 Possible cause Faulty upper heat exchanger expansion valve 8 Perform a check of the expansion valve s of the indoor unit s See service manual of the respective indoor unit s for more information Possible cause Faulty indoor unit expansion valve INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 36 F3 20 21 22 Compressor body t...

Page 59: ...r heat exchanger expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty upper heat exchanger expansion valve 7 Perform a check of the expansion valve s of the indoor unit s See service manual of the respective indoor unit s for more information Possible cause Faulty indoor unit expansion valve INFORMATION If all procedures listed above have been performed and the problem is still prese...

Page 60: ...heck of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 10 Perform a check of the indoor air thermistor See indoor unit manuals to check thermistors on indoor units Possible cause Faulty indoor air thermistor 11 Check all indoor units operation in heating mode Check for room temperatures below 20 C Check if ...

Page 61: ...and or humidity in the refrigerant circuit See 4 2 Refrigerant circuit 4363 Possible cause Non condensables and or humidity in the refrigerant circuit 6 Perform a check of the evaporator side expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty evaporator side expansion valve 7 Check for objects near the indoor unit that may block the airflow See 4 3 External factors 4372 Possible ca...

Page 62: ...ensation Unit will stop Manual reset via user interface To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the suction pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty suction pipe thermistor or connector fault 2 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge...

Page 63: ...units operation in heating mode Check for room temperatures below 20 C Check if caution disappears once rooms heat up If NOT continue checking the cause of the wet operation Possible cause Indoor room temperature too low when in heating mode Too cold rooms might create more subcool resulting in wet operation INFORMATION If all procedures listed above have been performed and the problem is still pr...

Page 64: ...ause Faulty evaporator side expansion valve 7 Check for objects near the indoor unit that may block the airflow See 4 3 External factors 4372 Possible cause Airflow of the indoor unit is blocked 8 Clean the air filters of the indoor unit s See service manual of the respective indoor unit s Possible cause Faulty or clogged air filter 9 Adjust external static pressure setting for ducted type indoor ...

Page 65: ... or connector fault 2 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 3 Perform a check of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 4 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant ...

Page 66: ...em is still present contact the helpdesk 2 3 42 F4 14 Indoor unit wet operation alarm Trigger Effect Reset In cooling mode on indoor Unit TGas Pipe TLiquid Pipe 2 5 C while Indoor Expansion Valve opening 300 pulse AND Outdoor Unit Discharge Superheat T Discharge T condensation 10 C for more than 45 minutes Unit stops Operating Manual reset via user interface To solve the error code INFORMATION It ...

Page 67: ...ndensation during test run Unit will stop running Manual reset via user interface Excessive subcool is detected from comparison of R1T ambient thermistor R3T liquid thermistor R11T de icer thermistor to saturated temperature derived from high pressure sensor S1NPH To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the outdoor air th...

Page 68: ...it fan motor 11 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 12 Perform a check of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 13 Perform a check of the indoor unit air thermistors See service manual of the r...

Page 69: ...t 3 Perform a check of the de icer thermistor See 3 21 Thermistors 4348 Possible cause Faulty de icer thermistor or connector fault 4 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 4363 Possible cause Refrigerant overcharge 5 Check for the presence of non condensables and or humidity in the refrigerant circuit See 4 2 Refrigerant circuit 4363 Possible cause Non c...

Page 70: ...low when in heating mode Too cold rooms might create more subcool resulting in wet operation INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 45 F6 03 Refrigerant overcharge detection by high subcool value Trigger Effect Reset Discharge superheat 10 C SHDischarge TDischarge Tcondensation during test run Unit will stop running ...

Page 71: ...ic pressure setting for ducted type indoor units if necessary 10 Perform a check of the indoor unit fan motor See service manual of the respective indoor unit s Possible cause Faulty indoor unit fan motor 11 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 12 Perform a check of the refrigerant high pressur...

Page 72: ... not the unit that shows U9 2 At the located branch selector box turn power supply OFF and then ON Check if error disappears Possible cause External noise Check further on how to eliminate external factors 3 Perform a check of the expansion valves in the branch selector box See 3 7 Expansion valve 4244 Possible cause Faulty expansion valve loose connector faulty expansion valve coil 4 Perform a ch...

Page 73: ... branch selector box PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 48 F9 03 Branch selector box electronic expansion valve abnormality subcooling Trigger Effect Reset After power is supplied continuity has not been detected on the coil for expansion valve Unit will stop running Power reset at branch selector box To solv...

Page 74: ...s Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Transmission abnormality between outdoor unit main PCB and inverter PCB A3P Unit will stop operating Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed orde...

Page 75: ... and inverter PCB A6P Unit will stop operating Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check wiring main PCB and inverter PCB 2 Check if connector X41A is correctly inserted See 6 2 Wiring diagram 4385 Possible cause Incorrect wiring 3 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty m...

Page 76: ...le cause Faulty outdoor unit fan motor M1F 2 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 52 H7 02 06 10 Defective fan inverter PCB A7P Main error code Sub error code Unit H7 01 Main 05 Sub 1 09 Sub 2 INFORM...

Page 77: ... indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Abnormal current form detected by fan inverter PCB during start up of fan motor Unit will stop operating Power reset at outdoor unit INFORMATION It is recommen...

Page 78: ...MATION It is recommended to perform the checks in the listed order 1 Perform a check of the outdoor unit fan motor M1F See 3 14 Outdoor unit fan motor 4307 Possible cause Faulty outdoor unit fan motor M1F 2 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P INFORMATION If all procedures listed above have been performed and the probl...

Page 79: ...Defrost fail alarm Trigger Effect Reset When outdoor unit judges defrost is not completed Unit keeps running Auto reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check the required space around the outdoor unit heat exchanger See 4 3 External factors 4372 Possible cause Insufficient air flow or air by pass due to required space specifications...

Page 80: ...ng 1 00 Trigger Effect Reset Compressor M1C discharge thermistor R21T open circuit or out of range Unit will stop operating Manual reset via user interface Automatic reset when thermistor read out is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause...

Page 81: ...e thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 2 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 59 J3 18 24 30 Discharge thermistor R22T open circuit Main error code Sub error code ...

Page 82: ...r code Unit J3 19 Main 25 Sub 1 31 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Compressor M2C discharge thermistor R22T short circuit or out of range Unit will stop ...

Page 83: ... 00 Trigger Effect Reset Compressor M1C body temperature thermistorR15T open circuit or out of range Unit will stop operating Manual reset via user interface Automatic reset when thermistor read out is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the compressor body thermistor See 3 21 Thermistors 4348 Possible ca...

Page 84: ... the listed order 1 Perform a check of the compressor body thermistor See 3 21 Thermistors 4348 Possible cause Faulty compressor body thermistor or connector fault 2 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 63 J3 56 57 58 High dischar...

Page 85: ...e cause Faulty subcool expansion valve 5 Perform a check of the expansion valve s of the indoor unit s See service manual of the respective indoor unit s for more information Possible cause Faulty indoor unit expansion valve 6 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB 7 Check if the refrigerant circuit is correctly charged See 4 2 Refrigerant circuit 436...

Page 86: ... Compressor suction thermistor R12T malfunction Main error code Sub error code Unit J5 01 Main 03 Sub 1 05 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Thermistor rea...

Page 87: ...outdoor units can be identified by field setting 1 00 Trigger Effect Reset Thermistor read out is out of range Unit will stop operating Auto reset when thermistor read out is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the suction pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty suction pipe thermi...

Page 88: ...See 3 21 Thermistors 4348 Possible cause Faulty de icer thermistor or connector fault 2 Perform a check of the Sub PCB See 3 20 Sub PCB 4342 Possible cause Faulty Sub PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 68 J6 08 09 10 Upper heat exchanger gas pipe thermistor R8T malfunction Main error code Sub error code Unit ...

Page 89: ...error code Unit J6 11 Main 12 Sub 1 13 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Lower heat exchanger gas pipe thermistor R9T short open circuit or out of range Un...

Page 90: ... by field setting 1 00 Trigger Effect Reset Main liquid pipe thermistor R3T short open circuit or out of range Unit will stop operating Manual reset via user interface Automatic reset when thermistor read out is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main liquid pipe thermistor See 3 21 Thermistors 4348 ...

Page 91: ...r See 3 21 Thermistors 4348 Possible cause Faulty refrigerant liquid thermistor of the subcool heat exchanger or connector fault 2 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 72 J8 01 02 03 Upper heat exchanger liquid temperature thermis...

Page 92: ...error code Unit J8 01 Main 02 Sub 1 03 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Lower heat exchanger liquid temperature thermistor R5T short open circuit or out o...

Page 93: ...y field setting 1 00 Trigger Effect Reset Autocharge thermistor R14T short open circuit or out of range Unit will stop operating Manual reset via user interface Automatic reset when thermistor read out is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the autocharge thermistor See 3 21 Thermistors 4348 Possible caus...

Page 94: ...the subcool heat exchanger See 3 21 Thermistors 4348 Possible cause Faulty gas pipe thermistor of the subcool heat exchanger 2 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 76 J9 08 09 10 Gas thermistor R6T abnormality Main error code Sub ...

Page 95: ...b 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Receiver gas thermistor R13T short open circuit or out of range Unit will stop operating Manual reset via user interface Au...

Page 96: ... is within range To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 2 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB INFORMATION If all procedures listed ab...

Page 97: ...edures listed above have been performed and the problem is still present contact the helpdesk 2 3 80 JC 06 08 10 Low pressure sensor S1NPL abnormality Main error code Sub error code Unit JC 06 Main 08 Sub 1 10 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Su...

Page 98: ...it is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Low pressure sensor S1NPL read out open circuit or out of range Unit will stop operating Manual reset via user interface Automatic reset when sensor read out is within range To solve the error code INFORMATION It is recommended to perform t...

Page 99: ...or code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P or non compatible inverter PCB 3 Perform a check of the compressor See 3 3 Compressor 4221 Possibl...

Page 100: ...ty setting 2 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P or non compatible inverter PCB 3 Perform a check of the compressor See 3 3 Compressor 4221 Possible cause Faulty compressor 4 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalanc...

Page 101: ...ible cause Faulty compressor 4 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 85 L1 04 10 14 Power transistor error on inverter PCB A3P Main ...

Page 102: ...ower drop Short circuit INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 86 L1 05 15 16 Inverter PCB A3P hardware fault Main error code Sub error code Unit L1 05 Main 15 Sub 1 16 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 ...

Page 103: ... Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Main PCB detects voltage current errors on output waveform or current read out Unit will stop operating Manual reset via user interface Po...

Page 104: ...s can be identified by field setting 1 00 Trigger Effect Reset Main PCB detects voltage current errors on output waveform or current read out Unit will stop operating Manual reset via user interface Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Fault...

Page 105: ... output waveform or current read out Unit will stop operating Manual reset via user interface Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274...

Page 106: ... To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P or non compatible inverter PCB 3 Perform a check of the compressor See 3 3 Compre...

Page 107: ...ng capacity setting 2 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P or non compatible inverter PCB 3 Perform a check of the compressor See 3 3 Compressor 4221 Possible cause Faulty compressor 4 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply...

Page 108: ...t contact the helpdesk 2 3 93 L1 29 33 35 Fan inverter PCB A7P Eeprom error Main error code Sub error code Unit L1 29 Main 33 Sub 1 35 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger...

Page 109: ...g writing memory EEPROM error Unit will stop operating Manual reset via user interface Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P or non compatible inverter PCB INFORMATION If all procedures listed above have be...

Page 110: ...1 47 Main 49 Sub 1 51 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Main PCB detects voltage current errors on output waveform or current read out Unit will stop opera...

Page 111: ...cted Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Main PCB detects voltage current errors on output waveform or current read out Unit will stop operating Manual reset via user interface Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the main PCB See 3...

Page 112: ...imer 3 minutes infinite cycle Automatic reset when within zero crossing interval range Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order INFORMATION Main PCB checks L1 N on connector X1A for sinus waveform each time crossing the zero line Interval between each zero crossing is 10 miliseconds when the power supply is 50 Hz 1 ...

Page 113: ...in zero crossing interval range Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order INFORMATION Main PCB checks L1 N on connector X1A for sinus waveform each time crossing the zero line Interval between each zero crossing is 10 miliseconds when the power supply is 50 Hz 1 Check if the power supply is conform with the regulatio...

Page 114: ...pective circuit breaker DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 2 Check that the thermal interface grease is applied properly on the PCB or refrigerant piping contact surface of the heat sink Adjust if needed Possible cause Thermal interface grease NOT applied properly on the heat sink 3 Check if heat sin...

Page 115: ...ed Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Thermistor located inside the power module of the fan inverter PCB detects a temperature higher than a certain value Unit will stop operating Manual reset via remote controller Outdoor unit power reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order Pre...

Page 116: ...8 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 102 L4 07 19 21 Fan inverter PCB A7P high fin temperature Main error code Sub error code Unit L4 07 Main 19 Sub 1 21 Sub 2 INFORMATION Main Sub 1 and Sub 2 indi...

Page 117: ...ause No refrigerant flow through the radiant cooling refrigerant circuit 5 Perform a check of the liquid cooling expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty liquid cooling expansion valve 6 Check ambient temperature Check if outdoor unit location temperature differs drastically 7 Check if there is discharge air by pass on installation location Possible cause External noise C...

Page 118: ...t sink 3 Check if heat sink plate is correctly fixed with screws Possible cause Heat sink plate not correctly installed 4 Check by touching if refrigerant is flowing through the radiant cooling refrigerant circuit The radiant cooling refrigerant circuit should be warm if refrigerant is flowing If no refrigerant flow perform a check of the liquid cooling expansion valve see 3 7 Expansion valve 4244...

Page 119: ...rm with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed stop va...

Page 120: ...rm with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed stop va...

Page 121: ... conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed s...

Page 122: ... conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed s...

Page 123: ...code INFORMATION It is recommended to perform the checks in the listed order 1 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Perform a ch...

Page 124: ...y or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check if the refrigerant circuit is clogged See 4 2 Refrigerant circuit 4363 Possible cause Clogged refrigerant circuit 3 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P 4 Perform a check of the compressor M2C See 3 3 Compressor 4221 Possible cause Faulty compresso...

Page 125: ... Perform a check of the compressor M1C See 3 3 Compressor 4221 Possible cause Faulty compressor M1C INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 111 L9 16 17 18 Inverter PCB A6P output phase abnormality Main error code Sub error code Unit L9 16 Main 17 Sub 1 18 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevan...

Page 126: ... the checks in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the noise filter PCB See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB 3 Perform a check of the inverter PCB See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB 4 Perform a check of the fan inverter PCB ...

Page 127: ...in the listed order 1 Perform a check of the main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the noise filter PCB A2P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Check the wiring between the PCB s S...

Page 128: ...8 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P 5 Check that the bridge connector X4A of the fan inverter PCB is correctly connected See 3 8 Fan inverter PCB 4259 Possible caus...

Page 129: ... 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Perform a check of the noise filter PCB A5P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A5P 5 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P 6 Perform a check of the fan inverter PCB A7P See 3 8 Fan inver...

Page 130: ... main PCB See 3 11 Main PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the noise filter PCB A2P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Perform a check of the noise filter PCB A5P See 3 12 Noise filter PCB 4298 Possi...

Page 131: ...ain PCB 4290 Possible cause Faulty main PCB or wrong capacity setting 2 Perform a check of the Sub PCB See 3 20 Sub PCB 4342 Possible cause Faulty Sub PCB 3 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s 4 Check if the correct spare part is installed for all PCB s See checking procedures of the specific PCB s Possible cause Wrong spare par...

Page 132: ...N If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 119 P1 07 08 09 Open phase or unbalanced power supply detection by inverter PCB A6P Main error code Sub error code Unit P1 07 Main 08 Sub 1 09 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 ...

Page 133: ...olve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check for objects near the indoor unit that may block the airflow See 4 3 External factors 4372 Possible cause Airflow of the indoor unit is blocked 2 Clean the air filters of the indoor unit s See service manual of the respective indoor unit s Possible cause Faulty or clogged air filter 3 Adjust external...

Page 134: ...ermistor of the PCB 1 Check the required space around the outdoor unit heat exchanger See 4 3 External factors 4372 Possible cause Insufficient air flow or air by pass due to required space specifications not met 2 Perform a check of the liquid cooling expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty liquid cooling expansion valve 3 Perform a check of the inverter PCB A3P See 3 1...

Page 135: ...e Insufficient air flow or air by pass due to required space specifications not met 2 Perform a check of the liquid cooling expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty liquid cooling expansion valve 3 Perform a check of the fan inverter PCB A4P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A4P INFORMATION If all procedures listed above have been perfor...

Page 136: ...use Insufficient air flow or air by pass due to required space specifications not met 2 Perform a check of the liquid cooling expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty liquid cooling expansion valve 3 Perform a check of the fan inverter PCB A7P See 3 8 Fan inverter PCB 4259 Possible cause Faulty fan inverter PCB A7P INFORMATION If all procedures listed above have been perf...

Page 137: ... liquid cooling expansion valve See 3 7 Expansion valve 4244 Possible cause Faulty liquid cooling expansion valve 3 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 125 P8 00 Freeze up during refrigerant auto charge Trigge...

Page 138: ... Push BS1 mode button once To solve the error code 1 Proceed with test run INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 127 PA 00 No refrigerant in refrigerant cylinder during auto charge Trigger Effect Reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Connect a new ref...

Page 139: ...ause No input at field setting 2 14 2 14 0 when field setting 2 88 0 2 Set field setting 2 88 to 1 see 6 9 Field settings 4455 Press the set button BS2 more than 5 seconds to start the short test run INFORMATION Leak check function will NOT be available if short test run is conducted while commissioning INFORMATION If all procedures listed above have been performed and the problem is still present...

Page 140: ...form a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 131 PJ 09 15 16 Capacity setting mismatch for fan inverter PCB A4P Main error code Sub error code Unit PJ 09 Main 15 Sub 1 16 Sub 2 INFORMATION Main Sub 1 and Sub 2 indications...

Page 141: ...FORMATION Main Sub 1 and Sub 2 indications are relevant in multiple outdoor unit configurations Main outdoor unit is the unit to which F1 F2 IN transmission line is connected Main Sub 1 and Sub 2 outdoor units can be identified by field setting 1 00 Trigger Effect Reset Main PCB detects other type PCB than set in EEPROM or wrong dip switch setting on spare part main PCB Unit will stop operating Ma...

Page 142: ...ing on spare part main PCB Unit will stop operating Manual reset via user interface Power reset at outdoor unit To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check if the correct spare part is installed for the main PCB See 3 11 Main PCB 4290 Check dips switch setting for spare part main PCB Possible cause Incorrect spare part main PCB or incorre...

Page 143: ...ant low pressure sensor 4 Perform a check of the suction pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty suction pipe thermistor or connector fault 5 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 6 Check for the presence of non condensables and or humidity in the refrigerant circuit See ...

Page 144: ...rm a check of the suction pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty suction pipe thermistor or connector fault 5 Perform a check of the discharge pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty discharge pipe thermistor or connector fault 6 Check for the presence of non condensables and or humidity in the refrigerant circuit See 4 2 Refrigerant circuit 4363 Po...

Page 145: ...7 Expansion valve 4244 Possible cause Faulty expansion valve 3 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 4 Perform a check of the suction pipe thermistor See 3 21 Thermistors 4348 Possible cause Faulty suction pipe thermistor or connector fault 5 Perform a check of the discharge pipe th...

Page 146: ...to perform the checks in the listed order 1 Check the phase sequence on the mains power supply terminal see To check the power supply of the unit in 4 1 Electrical circuit 4 356 Correct if needed Possible cause Incorrect phase sequence on mains power supply terminal 2 Check if any of the phases is missing on the mains power supply terminal see To check the power supply of the unit in 4 1 Electrica...

Page 147: ...e power supply of the unit in 4 1 Electrical circuit 4 356 Correct if needed Possible cause Incorrect phase sequence on mains power supply terminal 2 Check if any of the phases is missing on the mains power supply terminal see To check the power supply of the unit in 4 1 Electrical circuit 4 356 Correct if needed Possible cause Missing phase s on mains power supply terminal 3 Check if the phase L3...

Page 148: ...f the power supply imbalance 10 Power drop Short circuit 2 Perform a check of the noise filter PCB See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB 3 Perform a check of the inverter PCB s See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB s INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 141 U1...

Page 149: ...B See 3 11 Main PCB 4290 Possible cause Faulty main PCB 3 Perform a check of the inverter PCB s See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB s 4 Perform a check of the noise filter PCB See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 142 U2 ...

Page 150: ...ring 2 Perform a check of the noise filter PCB A2P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORMATION If all procedures listed above have been perfor...

Page 151: ... Perform a check of the noise filter PCB A2P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORMATION If all procedures listed above have been performed an...

Page 152: ...g 2 Perform a check of the noise filter PCB A2P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A2P 3 Perform a check of the inverter PCB A3P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A3P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORMATION If all procedures listed above have been performed...

Page 153: ...ring 2 Perform a check of the noise filter PCB A5P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A5P 3 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORMATION If all procedures listed above have been perfor...

Page 154: ... Perform a check of the noise filter PCB A5P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A5P 3 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORMATION If all procedures listed above have been performed an...

Page 155: ...circuit 4356 Possible cause Incorrect power supply wiring 2 Perform a check of the noise filter PCB A5P See 3 12 Noise filter PCB 4298 Possible cause Faulty noise filter PCB A5P 3 Perform a check of the inverter PCB A6P See 3 10 Inverter PCB 4274 Possible cause Faulty inverter PCB A6P 4 Check the wiring between the PCB s See 6 2 Wiring diagram 4385 Possible cause Faulty wiring between PCB s INFORM...

Page 156: ...ve have been performed and the problem is still present contact the helpdesk 2 3 149 U3 03 Test run not performed yet Trigger Effect Reset Test run NOT performed Unit will NOT operate Perform test run To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check if communication between outdoor unit and indoor units is initialised Check field setting 1 10 ...

Page 157: ...etween 1 or more indoor unit s and outdoor unit is NOT correct Check the F1 F2 transmission line between the indoor unit and outdoor unit see 4 1 Electrical circuit 4356 Possible cause Faulty or interruption in transmission line between indoor units and outdoor unit 4 Perform a test run from the outdoor unit See installer reference guide for more information INFORMATION If all procedures listed ab...

Page 158: ... solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check if communication between outdoor unit and indoor units is initialised Check field setting 1 10 for count of indoor units see 6 9 Field settings 4455 If less indoor units shown than expected communication between 1 or more indoor unit s and outdoor unit is NOT correct Check the F1 F2 transmission l...

Page 159: ...s and outdoor unit See 4 1 Electrical circuit 4356 Possible cause Faulty or interruption in transmission line between indoor units and outdoor unit 3 Perform a test run from the outdoor unit See installer reference guide for more information INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 154 U3 08 Transmission abnormality on...

Page 160: ...checks in the listed order 1 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check the F1 F2 transmission line between the indoor units and outdoor unit See 4 1 Electrical circuit 4356 Possible cause Faulty or interruption in transmission line between indoor un...

Page 161: ...rror code INFORMATION It is recommended to perform the checks in the listed order 1 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 2 Check the F1 F2 transmission line between the indoor units and outdoor unit See 4 1 Electrical circuit 4356 Possible cause Faulty...

Page 162: ...e checks in the listed order 1 Set field setting 2 5 of the outdoor unit to 1 to start the indoor units connected to that outdoor unit on forced fan operation see 6 9 Field settings 4 455 If any of these indoor units is NOT operating check the indoor unit s that have power black out or malfunctioning PCB See service manual of the respective indoor unit for more information Possible cause Power bla...

Page 163: ...le cause Faulty or interruption in transmission line between outdoor unit and option DTA104A61 62 5 Check that ONLY the master outdoor unit has F1 F2 IN connection If another outdoor unit has F1 F2 IN connection correct the installation 6 Check if low noise operation or demand control is active without an optional DTA104A61 62 PCB Field setting 2 12 CANNOT be set to 1 if DTA104A61 62 is not presen...

Page 164: ...n outdoor unit and sub 1 outdoor unit Trigger Effect Reset Main PCB on main outdoor unit detects transmission abnormality on a multi installation Forced stop Auto reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check the Q1 Q2 communication between the outdoor units See 4 1 Electrical circuit 4356 Possible cause Faulty or interruption in comm...

Page 165: ... main PCB of the sub 2 outdoor unit See 3 11 Main PCB 4290 Possible cause Faulty main PCB of the sub 2 outdoor unit 4 Check that ONLY the master outdoor unit has F1 F2 IN connection If another outdoor unit has F1 F2 IN connection correct the installation INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 162 U7 05 Multi system a...

Page 166: ...ain PCB on main outdoor unit detects transmission abnormality on a multi installation Forced stop Auto reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check the Q1 Q2 communication between the outdoor units See 4 1 Electrical circuit 4356 Possible cause Faulty or interruption in communication between outdoor units 2 Perform a check of the mai...

Page 167: ... 2 3 165 U7 11 Excess indoor units detected on test run Trigger Effect Reset Test run detects more than allowed amount of indoor units or indoor unit total index Forced stop Auto reset To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check total index and total count for indoor units See Data book on Business Portal for more information Possible cau...

Page 168: ... least one other indoor unit on same F1 F2 wiring has an error To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check the indoor units for error codes other than U9 01 See troubleshooting in the service manual of the respective indoor unit s to solve the error code s 2 Check for improper combination of units See the combination table in the Databook...

Page 169: ...t the helpdesk 2 3 168 UA 00 Combination abnormality Trigger Effect Reset Combination abnormality Forced stop Power reset and only allowed combination To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Change the installation with ONLY R410A type indoor units INFORMATION If all procedures listed above have been performed and the problem is still prese...

Page 170: ... problem is still present contact the helpdesk 2 3 171 UA 17 Combination abnormality Local setting abnormality Trigger Effect Reset Main PCB on main outdoor unit detects compatibility issues Forced stop Automatic reset after re initialization detects compatible units and normal field settings Main PCB detects field setting abnormality To solve the error code INFORMATION It is recommended to perfor...

Page 171: ...TION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 173 UA 19 Combination abnormality Local set alarm Trigger Effect Reset Main PCB on main outdoor unit detects compatibility issues Forced stop Automatic reset after re initialization detects compatible units and normal field settings Main PCB detects field setting abnormality local set ...

Page 172: ...cedures listed above have been performed and the problem is still present contact the helpdesk 2 3 175 UA 21 Combination abnormality BPMK units detected Trigger Effect Reset Main PCB detects BPMK unit s on F1 F2 wiring Forced stop Automatic reset after re initialization detects compatible units To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check ...

Page 173: ...7 UA 23 Branch selector box Abnormality Connected Indoor Unit Index too High Trigger Effect Reset Total indoor unit index connected to branch selector box is too high Alarm status ON Power reset at branch selector box To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check total index and total count for indoor units See Data book on Business Portal ...

Page 174: ...FORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 179 UA 26 Branch selector box Abnormality Transmission Wiring Abnormality on branch selector box Trigger Effect Reset Transmission abnormality detected between branch selector boxes Alarm status ON Auto recovery when transmission is normal To solve the error code INFORMATION It is...

Page 175: ...onnected through BS Units A system needs to have above a minimum combination ratio of indoor units that are connected through branch selector boxes See Databook for more information Possible cause Indoor Units connected through branch selector boxes are below allowed minimum ratio 3 Check the transmission wiring between branch selector box and connected indoor unit s See 4 1 Electrical circuit 435...

Page 176: ...or This means There is an error in the circuit but it is not the unit that shows U9 3 Check system layout Only BS Q A type branch selector boxes are compatible with VRV IV Heat Recovery System Possible cause Older type branch selector box installed INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 182 UA 29 Branch selector box ...

Page 177: ...ing Power reset at outdoor unit To solve the error code 1 Check outdoor units on the same Q1 Q2 wiring Heat Pump and Heat Recovery type outdoor units cannot be present on the same circuit Possible cause Heat Pump and Heat Recovery type units on same circuit 2 3 184 UA 31 Combination abnormality REMQ U Unit Detected Without a Multi Combination Trigger Effect Reset More than 3 outdoor units are dete...

Page 178: ...n as REMQ5U REMQ5U or REMQ8U REMQ5U Possible cause REMQ U unit installed in a not allowed multi combination 2 Check the Q1 Q2 communication between the outdoor units in multi combination See 4 1 Electrical circuit 4356 Possible cause Faulty wiring 3 Perform a check of the main PCB of the main outdoor unit See 3 11 Main PCB 4290 Possible cause Faulty main PCB of the main outdoor unit INFORMATION If...

Page 179: ... procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 188 UA 43 Combination abnormality Incorrect combination Trigger Effect Reset Main PCB on main outdoor unit detects compatibility issues Forced stop Automatic reset after re initialization detects compatible units To solve the error code INFORMATION It is recommended to perform the checks in the l...

Page 180: ... unit To solve the error code 1 HXHD A units are not allowed to connect under BS Unit piping Check HXHD A unit installation manual INFORMATION If all procedures listed above have been performed and the problem is still present contact the helpdesk 2 3 191 UA 51 Combination abnormality Only Hydrobox Units Detected Trigger Effect Reset Outdoor unit detects only hydro units connected Forced stop Powe...

Page 181: ...sistency on F1 F2 transmission Trigger Effect Reset Minimum 1 indoor unit fails to perform cross pipe check during test run Forced stop Perform test run To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Check that all stop valves of the refrigerant circuit are open See 4 2 Refrigerant circuit 4363 Possible cause Closed stop valve in the refrigerant c...

Page 182: ...ing connections of the system are correctly installed Possible cause Refrigerant piping and or wiring mismatch 3 Set field setting 2 5 of the outdoor unit to 1 to start the indoor units connected to that outdoor unit on forced fan operation see 6 9 Field settings 4 455 If any of these indoor units is NOT operating check the indoor unit s that have power black out or malfunctioning PCB See service ...

Page 183: ...its is NOT operating check the indoor unit s that have power black out or malfunctioning PCB See service manual of the respective indoor unit for more information Possible cause Power black out or malfunctioning PCB on indoor unit s 4 Check field setting 1 10 to count the indoor units see 6 9 Field settings 4455 If less indoor units detected than it should be check the indoor unit s that have powe...

Page 184: ...wer black out or malfunctioning PCB See service manual of the respective indoor unit for more information Possible cause Power black out or malfunctioning PCB on indoor unit s 4 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 5 Check the F1 F2 transmission line b...

Page 185: ...nual of the respective indoor unit for more information Possible cause Power black out or malfunctioning PCB on indoor unit s 4 Check if the power supply is conform with the regulations See 4 1 Electrical circuit 4356 Possible cause Faulty or disturbance of the power supply imbalance 10 Power drop Short circuit 5 Check the F1 F2 transmission line between the indoor units and outdoor unit See 4 1 E...

Page 186: ...tart refrigerant leak check mode Perform refrigerant leak check when average indoor temperature 15 C To solve the error code INFORMATION It is recommended to perform the checks in the listed order 1 Perform a check of the indoor unit air thermistors See service manual of the respective indoor unit s for more information Possible cause Faulty indoor unit air thermistor s 2 Perform refrigerant leak ...

Page 187: ...of the refrigerant high pressure sensor See 3 17 Refrigerant high pressure sensor 4330 Possible cause Faulty refrigerant high pressure sensor 2 Perform a check of the refrigerant low pressure sensor See 3 18 Refrigerant low pressure sensor 4333 Possible cause Faulty refrigerant low pressure sensor 3 Restart leak detection operation INFORMATION If all procedures listed above have been performed and...

Page 188: ...nd compare temperatures to auto charge time Perform a new leak test when the indoor and outdoor temperatures do NOT deviate too much compared to the time of test run Possible cause Indoor and or outdoor temperature s of test run and latest leak check function is drastically different from each other 3 Check if indoor unit layout has changed since latest test run If this is the case a new test run ...

Page 189: ...ning Unit Cleaning Error Brush motor AH 15 Self cleaning Unit Cleaning Error Cylinder motor AH 16 Self cleaning Unit Limit switch error brush motor slide AH 17 Self cleaning Unit Limit switch error cylinder motor side AJ 01 Capacity adapter missing AJ 02 Incorrect expansion valve motor C1 01 Transmission error between main PCB and fan motor PCB C1 02 Transmission error between main PCB and auxilia...

Page 190: ...03 Air thermistor on Remote controller open circuit U4 01 Communication error between indoor unit and outdoor unit U9 01 Error on other indoor unit UA 13 Combination error indoor unit outdoor unit refrigerant UA 15 Outdoor unit not compatible with self cleaning panel UE 00 Communication error with central controller device ...

Page 191: ...erter Overcurrent Error A3P 18 20 22 Inverter Overcurrent Error A6P E7 01 13 25 Outdoor Unit Fan Motor M1F Error 02 14 26 Outdoor Unit Fan Motor M2F Error 05 17 29 Outdoor Unit Fan Motor M1F Overcurrent Error 06 18 30 Outdoor Unit Fan Motor M2F Overcurrent Error 09 21 33 Fan Inverter PCB A4P IPM Overheated 10 22 34 Fan Inverter PCB A7P IPM Overheated E9 01 05 08 Electronic Expansion Valve Y1E Malf...

Page 192: ...2 04 06 Transmission Error on Inverter PCB A3P 03 05 07 Transmission Error on Inverter PCB A6P H7 01 05 09 Defective fan inverter PCB A4P 02 06 10 Defective fan inverter PCB A7P 21 23 26 Defective fan inverter PCB A7P 22 24 26 Defective fan inverter PCB A4P H9 01 02 03 Ambient Temperature Thermistor Malfunction HA Defrost Fail Alarm J3 16 22 28 Discharge Temperature Thermistor R21T Open Circuit 17...

Page 193: ...02 08 12 Inverter PCB A3P Current Detection Primary Circuit 03 09 13 Inverter PCB A3P Current Detection Secondary Circuit 04 10 14 Power Transistor Error on Inverter PCB A3P 05 15 16 Inverter PCB A3P Hardware Fault 17 22 42 Inverter PCB A6P Malfunction 18 23 43 Inverter PCB A6P Current Detection Primary Circuit 19 24 44 Inverter PCB A6P Current Detection Secondary Circuit 20 25 45 Power Transistor...

Page 194: ...ower Supply Detection by Inverter PCB A6P P2 00 Refrigerant Auto charge Interrupted P4 01 04 05 Fin Thermistor Fault on Inverter PCB A3P 02 15 17 Fin Thermistor Fault on Fan Inverter PCB A4P 03 16 18 Fin Thermistor Fault on Fan Inverter PCB A7P 06 07 08 Fin Thermistor Fault on Inverter PCB A6P P8 Freeze Up During Refrigerant Auto Charge P9 Refrigerant Auto Charge Finished Normally PA No Refrigeran...

Page 195: ...t Performed Yet 04 Test Run Ended Abnormally 05 Test Run Aborted on Initial Transmission 06 Test Run Aborted on Normal Transmission 07 Transmission abnormality on Test Run 08 Transmission abnormality on Test Run U4 01 Transmission Error between Indoor U and Outdoor Unit 03 Transmission Error between Indoor U and System 15 Unable to Start Test Run U7 01 Transmission Abnormality Between Systems DTA1...

Page 196: ...h Selector Box Detected 28 Branch Selector Box Abnormality Non compatible Branch Selector Box Detected 29 Branch Selector Box Abnormality Connected Indoor Unit Index too Low 30 Combination Abnormality Heat Pump and Heat Recovery Outdoor Units Detected in Same Combination 31 Combination Abnormality REMQ U Unit Detected Without a Multi Combination 35 Combination Abnormality REMQ U Unit Detected in W...

Page 197: ...cannot be performed Outdoor Air Temperature is out of range E 4 Refrigerant Leak Check is interrupted Too Low Pressure is Detected E 5 Refrigerant Leak Check cannot be performed A unit which is not compatible with Leak Detection Function is installed NG Refrigerant Leak Check Function detects refrigerant leak OK Refrigerant Leak Check Function detects no refrigerant leak ...

Page 198: ... Suction superheat Suction temperature evaporation temperature 5 K Suction superheat suction temperature evaporation temperature Suction temperature Read out from suction thermistor R3T Evaporation temperature Calculated by main PCB from the pressure read out of the low pressure sensor Suction superheat may be high if difference between indoor set temperature indoor air temperature is too high and...

Page 199: ...eration when the room temperature reaches the set temperature the outdoor unit goes off and the indoor unit changes to whisper fan speed This is to prevent cold air blowing directly on occupants of the room The fan speed will not change even when another indoor unit is in heating operation if the button is pressed 2 4 6 Symptom The fan direction does not correspond to the setting The fan direction...

Page 200: ...oise A low sah choro choro sound is heard while the indoor unit is stopped When another indoor unit is in operation this noise is heard In order to prevent oil and refrigerant from remaining in the system a small amount of refrigerant is kept flowing 2 4 11 Symptom Noise of air conditioners Indoor unit outdoor unit A continuous low hissing sound is heard when the system is in cooling or defrost op...

Page 201: ...oes not stop after a short heating operation This is to prevent refrigerant from remaining in the compressor The unit will stop after 5 to 10 minutes 2 4 18 Symptom The inside of an outdoor unit is warm even when the unit has stopped This is because the crankcase heater is warming the compressor so that the compressor can start smoothly 2 4 19 Symptom Hot air can be felt when the indoor unit is st...

Page 202: ...ly No Cool Heat master is set Select Cool Heat Master by pressing Operating Mode button on the desired unit The symbol will fade away for Cool Heat Master and will be fixed not blinking for the remaining indoor units Indoor unit s show icon blinking temporarily when ON button is pressed The unit s are either under Centralized Control and prohibited to operate or under Forced OFF operation by T1 T2...

Page 203: ...t Piping or wiring mismatch Tranmission or piping problem Correct piping wiring Abnormal refrigerant amount Outdoor unit may be overcharged or lacking refrigerant Check refrigerant amount See 4 2 Refrigerant circuit 4363 Incorrect thermistor values Thermistors not in their location miswiring or faulty thermistor Check thermistors see 3 21 Thermistors 4348 Incorrect expansion valve operation Expans...

Page 204: ...lves for heat exchanger that run as evaporator Check superheat Recover refrigerant and weigh Charge refrigerant to the correct amount Flash gas on liquid piping Expansion valve fault of refrigerant shortage Check expansion valves for heat exchangers that run as evaporator Check superheat Recover refrigerant and weigh Charge refrigerant to the correct amount 2 4 21 Other symptoms Mode Cooling Low p...

Page 205: ...n normal Moisture in refrigerant 1 Lower than normal Lower than normal Lower than normal Impurities dust burr in refrigerant 2 Lower than normal Lower than normal Lower than normal Refrigerant shortage Lower than normal Lower than normal Lower than normal Insufficient compression 3 Higher than normal Lower than normal Lower than normal 1 Water in the refrigerant freezes inside the electronic expan...

Page 206: ... not visually damaged Action Yes Perform an electrical check of the 4 way valve see 3 1 1 Checking procedures 4206 No Fix or replace the 4 way valve coil see 3 1 2 Repair procedures 4211 To perform an electrical check of the 4 way valve Prerequisite First perform a mechanical check of the 4 way valve see 3 1 1 Checking procedures 4206 1 Unplug the 4 way valve connector from the appropriate PCB 2 M...

Page 207: ...onnector connected to the PCB measure the voltage on the 4 way valve connection of the PCB The measured voltage MUST be 0 V AC for high pressure low pressure 4 way valve Y3S 230 V AC for lower heat exchanger 4 way valve Y4S 230 V AC for upper heat exchanger 4 way valve Y5S When operating with low load Y5S can switch OFF 0 V AC 7 De activate Heating and activate Cooling operation via the Cool Heat ...

Page 208: ...e Cooling mode Oil Return Operation in Cooling Defrost Oil Return Operation in Heating Y4S valve Heating mode Low load Cooling mode Simultaneous Cooling Heating operation Defrost operation Y5S valve Heating mode Oil Return Operation in simultaneous Cooling Heating mode Y5S may also be OFF if low load condition Is this the case Action No Skip the next step of this procedure Yes Perform the next ste...

Page 209: ...of the 4 way valve 1 First perform an electrical check of the 4 way valve see 3 1 1 Checking procedures 4206 When outdoor temperature is mild and unit can switch between heating and cooling INFORMATION This procedure is ONLY possible when the outdoor temperature is within the temperature range for both Heating and Cooling operation mode See the databook on Business Portal for the temperature range...

Page 210: ...rocedures 4211 When outdoor temperature does not allow the unit to run in cooling or heating mode INFORMATION Follow this procedure when the outdoor temperature is outside the temperature range for one of the operation modes Heating or Cooling The unit CANNOT operate in the mode for which the outdoor temperature is outside its temperature range See the databook on Business Portal for the temperatu...

Page 211: ...ller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite If needed remove any parts to create more space for the removal of the 4 way valve coil 1 Remove the screw and remove the 4 way valve coil from the 4 way valve body c a b a Screw b 4 way valve coil c 4 way valve body 2 Cut all tie straps that fix the 4 way val...

Page 212: ...uit The nitrogen pressure MUST NOT exceed 0 02 MPa 6 Heat the ends of the 4 way valve pipes using an oxygen acetylene torch and remove the expansion valve pipe ends 7 Stop the nitrogen supply when the piping has cooled down 8 To install the 4 way valve body see 3 1 2 Repair procedures 4211 To install the 4 way valve body 1 Install the 4 way valve in the correct location INFORMATION If any refriger...

Page 213: ...way valve coil 1 Install the 4 way valve coil on the 4 way valve body c a b a Screw b 4 way valve coil c 4 way valve body 2 Install and tighten the screw to fix the 4 way valve coil 3 Route the 4 way valve coil harness towards the appropriate PCB 4 Connect the 4 way valve coil connector to the PCB WARNING When reconnecting a connector to the PCB do NOT apply force as this may damage the connector ...

Page 214: ...ntral controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 1 Turn ON the power of the unit 2 Measure the voltage on connector X1A of the branch selector box PCB The voltage MUST be 230 V AC 10 BS1Q A a a Connector X1A BS4 16Q A a a Connector X1A Does the Branch selector box PCB receive power Action Yes Return to 3 2 1 ...

Page 215: ...to the unit see 4 1 2 Repair procedures 4361 To check the HAP LED of the branch selector box PCB Prerequisite First perform a power check of the Branch selector box PCB see 3 2 1 Checking procedures 4214 1 Locate the HAP LED on the Branch selector box PCB BS1Q A a a HAP LED BS4 16Q A a a HAP LED Does the HAP LED blink in regular intervals approximately 1 Hz Action Yes Return to 3 2 1 Checking proc...

Page 216: ...ctors are fully plugged in 2 Check that no connectors or wires are damaged 3 Check that the wiring corresponds with the wiring diagram see 6 2 Wiring diagram 4385 INFORMATION Correct the wiring as needed Is the problem solved Action Yes No further actions required No Return to 3 2 1 Checking procedures 4214 of the Branch selector box PCB and continue with the next procedure To check the fuse of th...

Page 217: ...llation manual Correct as needed Is the problem solved Action Yes No further actions required No Return to 3 2 1 Checking procedures 4214 of the Branch selector box PCB and continue with the next procedure Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error ...

Page 218: ...bridged connector X15A 5 Carefully pull the Branch selector box PCB at the side and unlatch the PCB supports one by one using a small pair of pliers BS1Q A a a a a a a a PCB support BS4 16Q A a a a a a a a a PCB support 6 Remove the Branch selector box PCB from the Branch selector box 7 To install the Branch selector box PCB see 3 2 2 Repair procedures 4217 To install the branch selector box PCB 1...

Page 219: ...y applicable for branch selector boxes BS4 16Q A PCB 5 Install the bridged connector X15A 6 Check DIP switches and adjust as required see 3 2 1 Checking procedures 4214 Is the problem solved Action Yes No further actions required No Return to 3 2 1 Checking procedures 4214 of the Branch selector box PCB and continue with the next procedure To remove a fuse of the branch selector box PCB Prerequisi...

Page 220: ... install a fuse on the branch selector box PCB see 3 2 2 Repair procedures 4217 To install a fuse on the branch selector box PCB WARNING For continued protection against risk of fire replace only with same type and rating of fuse 1 Install the fuse on the correct location on the PCB CAUTION Make sure the fuse is plugged in correctly contact with the fuse holder ...

Page 221: ...edure 3 3 Compressor 3 3 1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform an auditive check of the compressor Prerequisite First perform a power transistor check of the inverter PCB see 3 10 Inverter PCB 4274 If power transistor is OK proceed as follows Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the ...

Page 222: ... mechanical lock is present on the compressor Action Yes Replace the compressor see 3 3 2 Repair procedures 4227 No Perform an mechanical check of the compressor see 3 3 1 Checking procedures 4221 To perform a mechanical check of the compressor Prerequisite First perform an auditive check of the compressor see 3 3 1 Checking procedures 4221 Prerequisite Stop the unit operation via the central cont...

Page 223: ...erform a mechanical check of the compressor see 3 3 1 Checking procedures 4221 2 Hz rps x number of poles 2 For K Type Compressor Hz 3 x rps For G Type Compressor Hz 2 x rps DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 3 Remove the cover of the compressor wire terminals a a Compressor wire terminals cover 4 Di...

Page 224: ... the measured winding resistance 5 Measure the resistance between the compressor motor windings U V V W and U W Result All measurements MUST be approximately the same Unit Compressor Winding resistance value at temperature of 20 C REMQ5U REYQ8 12U M1C 0 26 Ω 5 REYQ14 16 M1C M2C 0 77 Ω 5 REYQ18 20 M1C 0 77 Ω 5 M2C 0 26 Ω 5 Compressor motor winding measurements are correct Action Yes Continue with t...

Page 225: ...in each phase U V V W and U W All measurements MUST be the same Compressor motor winding current measurements are correct Action Yes Perform an insulation check of the compressor see 3 3 1 Checking procedures 4221 No Preventively replace the compressor see 3 3 2 Repair procedures 4227 To perform an insulation check of the compressor Prerequisite First perform an electrical check of the compressor ...

Page 226: ...minals to allow correct connection during installation a a a a Faston connector 4 Set the Megger voltage to 500 V DC or 1000 V DC 5 Measure the insulation resistance between the following terminals The measured insulation resistance MUST be 3 MΩ U ground V ground W ground Compressor insulation measurements are correct Action Yes Compressor is OK Return to troubleshooting of the specific error and ...

Page 227: ...shown in the figure below 3 Tighten the bolt a again 1 3 2 1 3 3 3 2 x2 2 1 2 1 2 a b a 12 3 N m To remove the transportation stay only for 18 20 HP The transportation stays for protecting the unit during transport must be removed Proceed as shown in the figure and procedure below NOTICE If the unit is operated with the transportation stay attached abnormal vibration or noise may be generated 1 Sl...

Page 228: ...sulation Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 1 Detach all the strips a a a a a a Strip 2 Detach the strip b of the top jacket c 3 Remove the top jacket c 4 Remove the body jacket d from the compressor e b c e d b Strip c Top jacket ...

Page 229: ...r insulation Prerequisite Recuperate the refrigerant from the refrigerant circuit see 4 2 2 Repair procedures 4368 1 If needed remove any parts to create more space for the removal of the compressor DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 2 Remove the cover of the compressor wire terminals a a Compressor ...

Page 230: ...or Remove the crankcase heater see To remove the crankcase heater 4236 4 Cut the compressor pipes below the soldered joint using a pipe cutter a a a Compressor pipe 5 Remove the all the nuts and remove the compressor from the unit a a b c c c a a Nut b Compressor c Damper 6 Remove the 3 dampers from the compressor ...

Page 231: ...2 Install the 3 dampers in the correct location on the unit a a b c c c a a Nut b Compressor c Damper INFORMATION The compressor dampers may look different 3 Remove the caps from the compression pipe and suction pipe CAUTION The oil in the compressor is hygroscopic Therefore remove the caps from the compressor pipes as late as possible 4 Supply nitrogen to the refrigerant circuit The nitrogen pres...

Page 232: ...he compressor pipes and the oil inside the compressor pipes will damage or destroy the compressor 6 After soldering is done stop the nitrogen supply after the component has cooled down 7 Connect the Faston connectors to the compressor wire terminals U V and W a a a a Faston connector 8 Install the cover of the compressor wire terminals ...

Page 233: ... crankcase heater 4237 10 Install the compressor insulation see 3 3 2 Repair procedures 4227 Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure To install the compressor insulation b c e d b Strip c Top jacket d Body jacket e Compressor 1 Install the body jacket d on the compressor e 2 Install the...

Page 234: ...al check of the crankcase heater Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker 1 Remove the required plate work see 3 15 Plate work 4315 DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 2 Open the compressor insulation 3 Detach the spring that ...

Page 235: ...outdoor temperature Use a contact thermometer to measure the other thermistor temperatures Compare with the read out via the service monitoring tool or field settings 10 With the crankcase heater energised compressor OFF and discharge temperature 70 C measure the voltage on the crankcase heater connector on the PCB Result The measured voltage MUST be 230 V AC INFORMATION The compressor body temper...

Page 236: ...case heater see 3 4 2 Repair procedures 4236 3 4 2 Repair procedures To remove the crankcase heater Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker 1 Remove the required plate work see 3 15 Plate work 4315 DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier volt...

Page 237: ...e connector or connector pins of the PCB 5 Fix the crankcase heater harness using new tie straps INFORMATION Replace all cable ties that were cut during removal Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 5 Current sensor 3 5 1 Checking procedures To perform an electrical check of the cur...

Page 238: ...n pins 2 and 3 of the current sensor connector Result The measured value MUST be 45 50 Ω Is the measured resistance correct Action Yes Return to the troubleshooting of the specific error and continue with the next procedure No Replace the current sensor see 3 5 2 Repair procedures 4238 3 5 2 Repair procedures To remove the current sensor Prerequisite Stop the unit operation via the central control...

Page 239: ...current sensor see 3 5 2 Repair procedures 4238 To install the current sensor 1 Slide the current sensor on the power wiring and install the current sensor in place 2 Install the power wiring in the connections and fasten the screws 3 Install the ferrite core 4 Connect the current sensor connector 5 Install new tie wraps on the wiring of the current sensor and on the power wiring a b c b b d e e a...

Page 240: ...late work see 3 15 Plate work 4315 1 Turn ON the power of the unit 2 Force the indoor unit into cooling mode with high load condition 3 Check liquid pressure by a manifold on liquid stop valve 4 Check discharge pressure using the service monitoring tool or field setting mode 1 42 Make sure the refrigerant high pressure sensor is operating correctly See 3 17 1 Checking procedures 4330 5 Check R3T R...

Page 241: ...ext step NOTICE Below check procedure will only be relevant if indoor units are in heating mode with high load condition Y4S and Y5S MUST be ON 6 Force the indoor unit into heating mode with high load condition 7 Check liquid pressure by a manifold on liquid stop valve 8 Check suction pressure using the service monitoring tool or field setting mode 1 43 Make sure the refrigerant low pressure senso...

Page 242: ...No Component is OK Return to the troubleshooting of the specific error and continue with the next step 3 6 2 Repair procedures To remove the E bridge assembly Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Close the stop valves of the refrigerant c...

Page 243: ...and below the appropriate non return valve block 4 To install the E bridge with new non return valve s see 3 6 2 Repair procedures 4242 To install the E bridge assembly 1 Replace the necessary non return valve s a b g e c d f a Expansion valve b Cut here c Cut here d Cut here e Cut here f Cut above non return valve block g Cut below non return valve block INFORMATION Pay attention to the direction...

Page 244: ...ended to perform the checks in the listed order To perform a mechanical check of the expansion valve Prerequisite Power OFF the unit for 3 minutes Then turn ON the unit and listen to the expansion valve assembly If the expansion valve does NOT make a latching sound continue with the electrical check of the expansion valve see Checking procedures 4244 Prerequisite Stop the unit operation via the ce...

Page 245: ...ns of each phase wire and the common wire using a multi meter All measurements MUST be approximately the same Name Symbol Location PCB Connector Winding resistance Upper heat exchanger expansion valve Y1E Main X21A 150 15 Ω Sub cool expansion valve Y2E Main X22A 46 3 Ω Lower heat exchanger expansion valve Y3E Main X23A 150 15 Ω Receiver gas expansion valve Y4E Main X25A 150 15 Ω Liquid cooling exp...

Page 246: ...place the valve body if any leaks are found see Repair procedures 4247 5 Wait for the PCB to command the expansion valve to open pulse output to expansion valve visible on service monitoring tool INFORMATION If the PCB does NOT command the expansion valve to open when it is supposed to perform a check of the appropriate thermistors and pressure sensors expansion valves are driven by superheat or s...

Page 247: ...he expansion valve open Action Yes Component is OK Return to the troubleshooting of the specific error and continue with the next step No Replace the expansion valve see Repair procedures 4247 Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue ...

Page 248: ...om the appropriate PCB See To perform an electrical check of the expansion valve 4245 for an overview oft he expansion valve connectors and their locations 6 To install the expansion valve motor see Repair procedures 4247 To remove the expansion valve body Prerequisite Recuperate the refrigerant from the refrigerant circuit see 4 2 2 Repair procedures 4368 Prerequisite If needed remove any parts o...

Page 249: ...it The nitrogen pressure MUST NOT exceed 0 02 MPa 3 Wrap a wet rag around the expansion valve body and solder the refrigerant pipes to the expansion valve body CAUTION Overheating the valve will damage or destroy it 4 After soldering is done stop the nitrogen supply after the component has cooled down a b a Expansion valve body b Expansion valve pipe 5 To install the expansion valve motor see Repa...

Page 250: ...actions required No Return to Checking procedures 4244 of the expansion valve and continue with the next procedure To install the expansion valve motor with clip 1 Install the expansion valve motor on the expansion valve body INFORMATION The expansion valve motor is equipped with a pipe retention clip Install the pipe retention clip over the pipe to lock the expansion valve motor b a c a Expansion...

Page 251: ...the expansion valve body CAUTION Make sure to install the expansion valve motor in the correct position orientation b c c d e a a Expansion valve motor b Metal bracket c Nipple d Notch e Expanion valve body 2 Route the expansion valve motor harness towards the appropriate PCB 3 Connect the expansion valve motor connector to the appropriate PCB WARNING When reconnecting a connector to the PCB do NO...

Page 252: ...7 2 Slide the expansion valve magnet over the expansion valve body and gently rotate the magnet clockwise counterclockwise to manually close open the expansion valve Does the expansion valve open Action Yes Perform an electrical check of the expansion valve see Checking procedures 4252 No Replace the Branch selector box see Installation manual of the Branch selector box To perform an electrical ch...

Page 253: ...P LP gas pipe Y5E X25A 150 15 Ω Subcool Y6E X26A 46 3 Ω Suction gas pipe Y7E X27A 150 15 Ω HP LP gas pipe Y8E X28A 150 15 Ω Subcool Y9E X29A 46 3 Ω Suction gas pipe Y10E X30A 150 15 Ω HP LP gas pipe Y11E X31A 150 15 Ω Subcool Y12E X32A 46 3 Ω A2P Expansion valve name Symbol Connector Winding resistance BS4Q A BS6Q A BS8Q A BS10Q A BS12Q A BS16Q A Suction gas pipe Y13E X21A 150 15 Ω HP LP gas pipe ...

Page 254: ...ipe Y23E X31A 150 15 Ω Subcool Y24E X32A 46 3 Ω A3P Expansion valve name Symbol Connector Winding resistance BS4Q A BS6Q A BS8Q A BS10Q A BS12Q A BS16Q A Suction gas pipe Y25E X21A 150 15 Ω HP LP gas pipe Y26E X22A 150 15 Ω Subcool Y27E X23A 46 3 Ω Suction gas pipe Y28E X24A 150 15 Ω HP LP gas pipe Y29E X25A 150 15 Ω Subcool Y30E X26A 46 3 Ω Suction gas pipe Y31E X27A 150 15 Ω HP LP gas pipe Y32E ...

Page 255: ...pipe Y41E X25A 150 15 Ω Subcool Y42E X26A 46 3 Ω Suction gas pipe Y43E X27A 150 15 Ω HP LP gas pipe Y44E X28A 150 15 Ω Subcool Y45E X29A 46 3 Ω Suction gas pipe Y46E X30A 150 15 Ω HP LP gas pipe Y47E X31A 150 15 Ω Subcool Y48E X32A 46 3 Ω INFORMATION Below is an example of the resistance measurements in which the common wire is connected to pin 6 of the expansion valve motor connector Connections ...

Page 256: ...r the PCB to command the expansion valve to open pulse output to expansion valve visible on service monitoring tool INFORMATION If the PCB does NOT command the expansion valve to open when it is supposed to perform a check of the appropriate thermistors and pressure sensors expansion valves are driven by superheat or subcool value calculated through the thermistors 6 While in opening or closing se...

Page 257: ...on Yes Component is OK Return to the troubleshooting of the specific error and continue with the next step No Replace the Branch selector box see Branch selector box Installation manual Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with th...

Page 258: ...expansion valve coil connector from the appropriate PCB See To perform an electrical check of the expansion valve 4 252 for an overview of the expansion valve connectors and their locations 5 To install the expansion valve coil see Repair procedures 4257 To install the expansion valve coil 1 Install the expansion valve coil on the expansion valve body INFORMATION Turn the expansion valve motor 1 8...

Page 259: ... perform a power check of the fan inverter PCB Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Access the switch box see 3 15 Plate work 4315 1 Turn ON the power of the unit 2 Measure the voltage between pins 1 and 3 of connector X5A The measured vo...

Page 260: ...oes the HAP LED blink in regular intervals approximately 1 Hz Action Yes Return to Checking procedures 4259 of the fan inverter PCB and continue with the next procedure No Replace the fan inverter PCB see Repair procedures 4263 To check if the correct spare part is installed Prerequisite First perform all earlier checks of the fan inverter PCB see Checking procedures 4259 1 Visit your local spare ...

Page 261: ...ted and that all connectors are fully plugged in 2 Check that no connectors or wires are damaged 3 Check that the wiring corresponds with the wiring diagram see 6 2 Wiring diagram 4385 INFORMATION Correct the wiring as needed Is the problem solved Action Yes No further actions required No Return to Checking procedures 4259 of the fan inverter PCB and continue with the next procedure To check the f...

Page 262: ...fier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 2 Check the fan inverter PCB in reference with the tables below c a b d e f a Fan inverter PCB A4P b Connector P1 c Connector N1 d Connector X1A pin U e Connector X1A pin V f Connector X1A pin W VDC Com Ref VDC Com Ref P1 X1A pin U O L N1 X1A pin V 0 45 P1 X1A pin V O L N1 X1A pin W 0 45 P1 X1A pin W O L X1A pi...

Page 263: ... the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Access the switch box see 3 15 Plate work 4315 1 Locate the fan inverter PCB 2 Using pliers detach the cable clamp from the power terminal assembly a a b a Cable clamp b Fan connector X1A 3 Disconnect the fan connector X1A from the fan inver...

Page 264: ...8 To install the new fan inverter PCB see Repair procedures 4263 To install the fan inverter PCB 1 Clean the heat sink surface and apply a thin layer of heat sink compound to the heat sink surface 2 Install the fan inverter PCB on its correct location 3 Latch the PCB supports using a small pair of pliers to fix the PCB 4 Install and tighten the 2 screws to fix the fan inverter PCB to the heat sink...

Page 265: ...e 3 8 2 Double fan outdoor unit Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform a power check of the fan inverter PCB Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Access the switch box see 3 ...

Page 266: ...he measured output voltage on the inverter PCB correct Action Yes Correct the wiring between the fan inverter PCB and the inverter PCB see 4 1 2 Repair procedures 4361 No Perform a check of the inverter PCB see 3 10 1 Checking procedures 4274 To check the HAP LED of the fan inverter PCB Prerequisite First perform a power check of the fan inverter PCB see Checking procedures 4265 1 Locate the HAP L...

Page 267: ...er PCB see Repair procedures 4269 To check the wiring of the fan inverter PCB Prerequisite First perform all earlier checks of the fan inverter PCB see Checking procedures 4265 Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker 1 Check that all wires are properly connected and that all connectors are fully plugged in 2 Check that no...

Page 268: ...perform a power transistor check of the fan inverter PCB Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 1 Set the multimeter to diode measurement DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rect...

Page 269: ...in U 0 45 N11 P11 0 75 Are the test results OK Action Yes Power transistors are OK Return to Checking procedures 4265 No Replace the fan inverter PCB see Repair procedures 4269 Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next pr...

Page 270: ...a thin layer of heat sink compound to the heat sink surface 2 Install the fan inverter PCB on its correct location 3 Latch the PCB supports using a small pair of pliers to fix the PCB 4 Install and tighten the 2 screws to fix the fan inverter PCB to the heat sink plate a b b a d c a a a Connector b Screw c Connector X1A d Connector X4A 5 Connect all connectors to the fan inverter PCB 6 Reinstall c...

Page 271: ...the high pressure switch and the appropriate PCB If NO continuity is measured repair as needed see 6 2 Wiring diagram 4385 4 Measure the resistance between the pins 1 2 of the high pressure switch connector Result The switch MUST be closed INFORMATION Connect the service monitoring tool to the unit or use field settings mode 1 42 see 6 9 Field settings 4455 to monitor the high pressure switch If t...

Page 272: ... No Replace the high pressure switch see 3 9 2 Repair procedures 4272 3 9 2 Repair procedures To remove the high pressure switch Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Recuperate the refrigerant from the refrigerant circuit see 4 2 2 Repair...

Page 273: ...MUST NOT exceed 0 02 MPa 3 Wrap a wet rag around the high pressure switch and solder the high pressure switch pipe to the high pressure switch a b c c d d e a High pressure switch b High pressure switch pipe c Screw d Clamp e Plate CAUTION Overheating the pressure switch will damage or destroy it 4 After soldering is done stop the nitrogen supply after the component has cooled down 5 Install the c...

Page 274: ...he voltage between the following wires on the inverter PCB Result All measurements MUST be 400 V AC L1B L2B L1B L3B L2B L3B b a c a Wire L1B b Wire L2B c Wire L3B Does the inverter PCB receive power Action Yes Return to 3 10 1 Checking procedures 4274 of the inverter PCB and continue with the next procedure No Continue with the next step 3 Perform an electrical check of the noise filter PCB see 3 ...

Page 275: ...10 2 Repair procedures 4282 To check if the correct spare part is installed Prerequisite First perform all earlier checks of the inverter PCB see 3 10 1 Checking procedures 4274 1 Visit your local spare parts webbank 2 Enter the model name of your unit and check if the installed spare part number corresponds with the spare part number indicated in the webbank Is the correct spare part for the inve...

Page 276: ...te First perform all earlier checks of the inverter PCB see 3 10 1 Checking procedures 4274 1 Measure the continuity of the fuse If no continuity is measured the fuse has blown a a Fuse Any blown fuses on the inverter PCB Action Yes Replace the inverter PCB see 3 10 2 Repair procedures 4282 No Return to 3 10 1 Checking procedures 4274 of the inverter PCB and continue with the next procedure To che...

Page 277: ...tage should be approximately 560 V DC a d c b a Connector X5A b Connector X6A c Inverter PCB A3P d Inverter PCB A6P Is the measured voltage correct Action Yes Diode module and power module are OK Perform a power transistor check of the inverter PCB see 3 10 1 Checking procedures 4274 No Perform a diode module and power module check see 3 10 1 Checking procedures 4274 To perform a diode module and ...

Page 278: ...10 V DC before proceeding see To check the rectifier voltage 4356 2 Remove the cover of the compressor wire terminals a a Compressor wire terminals cover 3 Disconnect the Faston connectors from the compressor wire terminals U V and W INFORMATION Note the position of the Faston connectors on the compressor wire terminals to allow correct connection during installation a a a a Faston connector ...

Page 279: ...uring point P 4 Check the diode module and the power module in reference with the tables below Diode module check VDC Com Ref VDC Com Ref P1 L1B O L N31 L1B 0 50 P1 L2B O L N31 L2B 0 50 P1 L3B O L N31 L3B 0 50 L1B P1 0 50 L1B N31 O L L2B P1 0 50 L2B N31 O L L3B P1 0 50 L3B N31 O L N31 P1 0 90 P1 N31 O L Power module check VDC Com Ref VDC Com Ref P U O L N31 U 0 43 P V O L N31 V 0 43 P W O L N31 W ...

Page 280: ...ter PCB see 3 10 1 Checking procedures 4274 Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker 1 Open the compressor insulation DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 2 Remove the cover of the compressor wire terminals a a Compressor wire ...

Page 281: ...t casing Secure the compressor wiring to avoid touching them accidentally 4 Connect the Faston connectors to the Inverter Analyzer SPP number 1368521 a Inverter checker e 2 LEDs for phase U b Faston terminal U f 2 LEDs for phase V c Faston terminal V g 2 LEDs for phase W d Faston terminal W 5 Turn ON the power of the unit 6 Activate power transistor check mode by applying field setting 2 28 1 Resu...

Page 282: ...Checking procedures 4274 No Replace the inverter PCB see 3 10 2 Repair procedures 4282 Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 10 2 Repair procedures To remove the inverter PCB Prerequisite Stop the unit ope...

Page 283: ...g from the main board 6 Detach the tie wrap 7 Loosen and remove the screw that fixes the cable clamp a g b c h d f e g j i k k l m n a Screw b Cable clamp c Tie wrap d Tie wrap e Cables f Cables g Screw h Compressor inverter assembly i Screw j Thermistor clamp k Screw l Heat pipe m Ground wire n Screw 8 Detach the tie wrap 9 Cut the tie wraps on the cable harness 10 Separate the cables and 11 Loos...

Page 284: ...fixes the power terminal assembly 17 Move the power terminal assembly to the right f b f d a b b b c e d f f g g a Power terminal assembly b Screw c Heat sink d Inverter PCB e Compressor cable f Screw g Screw 18 Disconnect connectors X3 and X5 from the fan inverter PCB 19 Turn the power terminal assembly to the left 20 Remove the 4 screws that fix the heat sink WARNING Thermal grease is applied to...

Page 285: ...holes on the PCB Remove the screws to remove the PCB from the heat sink element a b b b a b b b b b a Screw b PCB support 26 Unlatch the PCB supports one by one using a small pair of pliers 27 Remove the compressor inverter PCB For double fan units 28 Disconnect all connectors from the inverter PCB 29 Disconnect the wire terminals of the inverter PCB a b a b b b b b b b c c c c c c c a a c d d a C...

Page 286: ...ter PCB 34 To install the new inverter PCB see 3 10 2 Repair procedures 4282 To install the inverter PCB For single fan units 1 Clean the heat sink c surface and apply a thin layer of heat sink compound to the heat sink surface 2 Install the inverter PCB on its correct location 3 Latch the PCB supports c using a small pair of pliers to fix the PCB 4 Install and tighten the 2 screws d to fix the in...

Page 287: ...al position 7 Install the 4 screws b that fix the heat sink c 8 Turn the power terminal assembly a to the right h g f e a c b d e a Flat screwdriver b Heat pipe c Heat sink d Screw e Power terminal assembly f Connector X3 g Connector X5 h Fan inverter PCB 9 Connect connectors X3 f and X5 g from to fan inverter PCB h 10 Move the power terminal assembly e to the left 11 Install the screw d to fix th...

Page 288: ...tall the 2 screws k to fix the heat pipe l 15 Install the screw i to fix the thermistor clamp j 16 Install the 2 screws g to fix the compressor inverter assembly h 17 Tie the cables e and f together with tie wraps c d 18 Install the screw a to fix the cable clamp b g a a b d c d c e f a Screw b Power terminal assembly c Screw d Cable clamp e Connectors X1A and X2A f Wiring g Tie wrap 19 Install th...

Page 289: ... fix the PCB 27 Install and tighten the 2 screws d to fix the inverter PCB to the heat sink plate a b a b b b b b b b c c c c c c c a a c d d a Connector b Connector c PCB support d Screw 28 Install the 4 screws e that fix the heat sink f to the switch box e f e e e e f e e e e Screw f Heat sink 29 Connect all connectors a to the inverter PCB 30 Connect the wire terminals b to the inverter PCB Is ...

Page 290: ... AC 10 L3 pin 1 N pin 5 L1 pin 3 N pin 5 a a Connector X1A Does the main PCB receive power Action Yes Return to 3 11 1 Checking procedures 4290 of the main PCB and continue with the next procedure No Continue with the next step 3 Check the power supply to the unit see 4 1 1 Checking procedures 4356 Does the unit receive power Action Yes Correct the wiring from the main power supply terminal to the...

Page 291: ...cking procedures 4290 1 Locate the HAP LED on the main PCB a a HAP LED Does the HAP LED blink in regular intervals approximately 1 Hz Action Yes Return to 3 11 1 Checking procedures 4290 of the main PCB and continue with the next procedure No Replace the main PCB 3 11 2 Repair procedures 4293 To check if the correct spare part is installed 1 First perform all earlier checks of the main PCB see 3 1...

Page 292: ...ected and that all connectors are fully plugged in 2 Check that no connectors or wires are damaged 3 Check that the wiring corresponds with the wiring diagram see 6 2 Wiring diagram 4385 4 Check that the bridge connector X4A is plugged in see 6 2 Wiring diagram 4385 INFORMATION Correct the wiring as needed Is the problem solved Action Yes No further actions required No Return to 3 11 1 Checking pr...

Page 293: ...ures 4293 No Return to 3 11 1 Checking procedures 4290 of the main PCB and continue with the next procedure Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 11 2 Repair procedures To correct the wiring from the main ...

Page 294: ...c c c c c c c a Connector b Wire terminal c PCB support 3 Disconnect all connectors from the main PCB assembly 4 Note the field wiring on X1M transmission field wiring terminals 5 Disconnect wiring connections on wiring terminals 6 Carefully pull the PCB at the side and unlatch the PCB supports one by one using a small pair of pliers 7 Remove the main PCB 8 To install the new outdoor unit main PCB...

Page 295: ...wiring the black white wiring should be connected to X40A and the red black wiring should be connected to X41A 5 Connect all the wire terminals 6 When installing a new main PCB it needs to be defined for capacity Otherwise PJ error is generated 7 When installing a new main PCB set the dipswitch settings accordingly to the model See 3 11 2 Repair procedures 4293 Is the problem solved Action Yes No ...

Page 296: ...es are OFF REYQ8 DS2 2 is ON REYQ10 DS2 1 and DS2 2 are ON REYQ12 DS2 3 is ON REYQ14 DS2 1 and DS2 3 are ON REYQ16 DS2 2 and DS2 3 are ON REYQ18 DS2 1 and DS2 2 and DS2 3 are ON REYQ20 DS2 4 is ON 3 After replacing main PCBA1P a test run is required Refer to Installation Manual for Test Run If test run is not carried out successfully U3 Error will be triggered 4 If PJ or UA or U7 Errors are trigge...

Page 297: ...om the PCB a a a Fuse 2 To install the fuse on the main PCB see 3 11 2 Repair procedures 4293 To install a fuse on the main PCB WARNING For continued protection against risk of fire replace only with same type and rating of fuse 1 Install the fuse on the correct location on the PCB CAUTION Make sure the fuse is plugged in correctly contact with the fuse holder a a a Fuse Is the problem solved Acti...

Page 298: ...wing wires of the noise filter PCB on the location shown below All measurements MUST be 400 V AC L1A L2A L1A L3A L2A L3A a b c a L1A b L1A c L3A Is the measured voltage on the PCB correct Action Yes Return to 3 12 1 Checking procedures 4298 procedures of the PCB and continue with the next procedure No Continue with the next step 3 Check the power supply to the unit see 4 1 1 Checking procedures 43...

Page 299: ...requisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker 1 Check that all wires are properly connected and that all connectors are fully plugged in 2 Check that no connectors or wires are damaged 3 Check that the wiring corresponds with the wiring diagram see 6 2 Wiring diagram 4385 INFORMATION Correct the wiring as needed Is the problem sol...

Page 300: ... noise filter PCB Prerequisite First perform all earlier checks of the noise filter PCB see 3 12 1 Checking procedures 4298 1 Measure the continuity of the fuse If no continuity is measured the fuse has blown a a a a a Fuse Blown fuse on the noise filter PCB Action Yes Replace the noise filter PCB see 3 12 2 Repair procedures 4301 No Return to 3 12 1 Checking procedures 4298 of the noise filter PC...

Page 301: ...inuity of all wires 4 Replace any damaged or broken wires Is the problem solved Action Yes No further actions required No Return to 3 12 1 Checking procedures 4298 of the noise filter PCB and continue with the next procedure To remove the noise filter PCB Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the req...

Page 302: ...filter PCB and continue with the next procedure 3 13 Oil return valve 3 13 1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform a mechanical check of the oil return valve Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate w...

Page 303: ... an indoor unit via remote controller or central controller 5 Measure the voltage on the Y11S or Y12S valve connection on the PCB Result The measured voltage MUST be 0 V AC Y11S and Y12S are NOT energized when compressor is OFF and the pressure difference between the high and low pressure 0 3 MPa 6 Connect the service monitoring tool to the unit and check the pressure difference between the high a...

Page 304: ... procedures 4304 Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 13 2 Repair procedures To remove the oil return valve coil Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the r...

Page 305: ...circuit The nitrogen pressure MUST NOT exceed 0 02 MPa 6 Heat the end of the oil return valve pipes using an oxygen acetylene torch and remove the oil return valve pipe ends 7 Stop the nitrogen supply when the piping has cooled down 8 To install the oil return valve body see 3 13 2 Repair procedures 4304 To install the oil return valve body 1 Install the oil return valve in the correct location 2 ...

Page 306: ...urn valve coil on the oil return valve body b c a a Screw b Valve coil c Valve body 2 Install and tighten the screw to fix the oil return valve coil 3 Route the oil return valve coil harness towards the appropriate PCB 4 Connect the oil return valve coil connector to the PCB WARNING When reconnecting a connector to the PCB do NOT apply force as this may damage the connector or connector pins of th...

Page 307: ... Check the state of the propeller fan blade assembly for damage deformations and cracks Is the propeller fan blade assembly damaged Action Yes Replace the propeller fan blade assembly see Repair procedures 4308 No Perform a mechanical check of the DC fan motor assembly see Checking procedures 4307 To perform a mechanical check of the DC fan motor assembly Prerequisite First perform a mechanical ch...

Page 308: ...r and measure the resistance between the pins 1 2 1 3 and 2 3 of the DC fan motor connector Result All measurements MUST be 8 27 Ω 5 at 20 C INFORMATION Winding resistance values above are given for reference You should NOT be reading a value in kΩ or a short circuit Make sure that the propeller fan blade does NOT rotate as this could affect resistance measurements 9 Measure the insulation resista...

Page 309: ... axle c b d a e a Screw b Allen key c Axle cover d Propeller fan blade assembly e Pulley remover INFORMATION Use a pulley remover if the propeller cannot be removed manually 5 To install the propeller fan blade assembly see Repair procedures 4308 To remove the DC fan motor assembly 1 Remove the propeller fan blade assembly from the DC fan motor assembly see Repair procedures 4308 2 Disconnect the ...

Page 310: ...an motor assembly to the unit by tightening the screws 3 Route the DC fan motor cable 4 Attach the DC fan motor cable 5 Install a new tie strap to fix the DC fan motor cable 6 Connect the DC fan motor connector to the connector on the fan inverter PCB 7 Lock the ferrite bead 8 Install the propeller fan blade assembly see Repair procedures 4308 To install the propeller fan blade assembly 1 Install ...

Page 311: ...ORMATION It is recommended to perform the checks in the listed order To perform a mechanical check of the propeller fan blade assemblies Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 1 If propeller fan blade touches the bellmounth check if the fan motor is cor...

Page 312: ...chanical check of both DC fan motor assemblies see Checking procedures 4311 2 Turn ON the power of the unit 3 Activate Cooling or Heating operation via the Cool Heat master user interface 4 Check the functioning of the outdoor unit fan Outdoor unit fan Action Rotates continuously without interruption DC fan motor assembly is OK Return to the troubleshooting of the specific error and continue with ...

Page 313: ...4265 No Replace the DC fan motor assembly see Repair procedures 4313 Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure Repair procedures To remove the propeller fan blade assembly Prerequisite Stop the unit operation vi...

Page 314: ...e fan inverter PCB 4 Unlock the ferrite bead 5 Cut the tie strap 6 Detach the DC fan motor cable b c d c a c c a Fan motor cable b Tie wrap c Screw d Fan motor 7 Remove the 4 screws that fix the DC fan motor assembly 8 Remove the DC fan motor assembly from the unit 9 To install the DC fan motor assembly see Repair procedures 4313 To install the DC fan motor assembly 1 Install the DC fan motor asse...

Page 315: ...ng an Allen key to fix the propeller fan blade assembly c b d a e a Screw b Allen key c Axle cover d Propeller fan blade assembly Is the problem solved Action Yes No further actions required No Return to Checking procedures 4311 of the outdoor unit fan motor and continue with the next procedure 3 15 Plate work 3 15 1 To access the switch box on single fan units Prerequisite Stop the unit operation...

Page 316: ...inal assembly d Screw 2 Remove the 4 screws that fix the main PCB assembly 3 Remove the 3 screws that fix the power supply terminal assembly a c b a Main PCB b Power input wiring c Noise filter PCB 4 Slightly tilt the main PCB assembly to access the power input wiring on the noise filter PCB 5 Remove the power input wiring from the noise filter PCB ...

Page 317: ...rerequisite Turn OFF the respective circuit breaker 1 Remove the required plate work see 3 15 Plate work 4315 DANGER RISK OF ELECTROCUTION Confirm the rectifier voltage is below 10 V DC before proceeding see To check the rectifier voltage 4356 b a d c e b a e a b e e f a a a a e e b a 2 1 a Screw b Screw c Short screw d Screw e Screw f Inverter mounting plate 2 Do NOT loosen the screws a that fix ...

Page 318: ...the heat sinks from the inverter boards 7 Loosen and remove the 6 screws e that fix the inverter mounting plate a b a Inverter mounting plate b Liquid cooling piping 8 Carefully pull the inverter mounting plate a to the front and tilt it Pay attention to the liquid cooling piping b 9 Disconnect the necessary wiring to have access to noise filter PCB s the reactors and on the rear side of the inver...

Page 319: ...late 2 Loosen and remove the 2 screws a that fix the service plate assembly 3 Remove the service plate assembly b from the unit To remove the upper front plate b a a a a a a a a Screw b Upper front plate 4 Loosen and remove the 7 screws a that fix the upper front plate assembly 5 Lift the upper front plate assembly b and remove it from the unit ...

Page 320: ...e assembly 7 Lift the front plate assembly b and remove it from the unit To remove the switch box cover DANGER RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF to be sure the rectifier voltage is below 10 V DC before proceeding b a a a Screw b Switchbox cover 8 Loosen and remove the 2 screws a that fix the switchbox cover 9 Remove the switchbox cover...

Page 321: ...front plate 10 Loosen and remove the 3 screws a that fix the lower front plate assembly 11 Lift the lower front plate assembly b and remove it from the unit To remove the side plate a a b a a a a a a Screw b Side plate 12 Loosen and remove the 7 screws a that fix the side plate assembly 13 Lift the side plate assembly b and remove it from the unit ...

Page 322: ...er side plate assembly 15 Lift the upper side plate assembly b and remove it from the unit To remove the top plate b a a a a a a b a Screw b Top plate 16 Loosen and remove the 12 screws a that fix the top plate assembly 17 Remove the top plate b from the unit 3 15 4 To remove the plate work on double fan units Prerequisite Stop the unit operation via the central controller 1 Turn OFF the respectiv...

Page 323: ...late 2 Loosen and remove the 2 screws a that fix the service plate assembly 3 Remove the service plate assembly b from the unit To remove the upper front plate b a a a a a a a a Screw b Upper front plate 4 Loosen and remove the 7 screws a that fix the upper front plate assembly 5 Lift the upper front plate assembly b and remove it from the unit ...

Page 324: ...ssembly 7 Lift the front plate assembly b and remove it from the unit To remove the switch box cover DANGER RISK OF ELECTROCUTION Wait for at least 10 minutes after the circuit breaker has been turned OFF to be sure the rectifier voltage is below 10 V DC before proceeding a a a b a a a Screw b Switchbox cover 8 Loosen and remove the 5 screws a that fix the switchbox cover 9 Remove the switchbox co...

Page 325: ...front plate 10 Loosen and remove the 3 screws a that fix the lower front plate assembly 11 Lift the lower front plate assembly b and remove it from the unit To remove the side plate a a b a a a a a a Screw b Side plate 12 Loosen and remove the 7 screws a that fix the side plate assembly 13 Lift the side plate assembly b and remove it from the unit ...

Page 326: ...e it from the unit To remove the top plate b a a a a a a b a Screw b Top plate 16 Loosen and remove the 12 screws a that fix the top plate assembly 17 Remove the top plate b from the unit 3 15 5 To remove the plate work on the branch selector box Prerequisite Stop the unit operation via the central controller 1 Turn OFF the respective circuit breaker To remove the switch box cover 2 Loosen and rem...

Page 327: ...Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 a a a a c b a Screw b Switch box cover c Branch selector box PCB To remove the top plate 4 Loosen and remove the top plate screws 5 Lift the top plate and remove it from the unit a b b a a a a Screw b Cover ...

Page 328: ... Remove the wiring or Faston connectors from the reactor 5 Using a megger device of 500 V DC check the insulation resistance Make sure there is no earth leakage Is the measured insulation resistance correct Action Yes Continue with the next step No Replace the reactor see 3 16 2 Repair procedures 4328 6 Measure the continuity of the reactor Is the continuity measurement correct Action Yes Return t...

Page 329: ...reactor to the switch box 5 To install the reactor see 3 16 2 Repair procedures 4328 To install the reactor 1 Install the reactor on the correct location in the switch box a a c a c c c b b c c c c a Screw b Faston connector c Screw 2 Install the 4 screws that fix the reactor to the switch box 3 Connect the wiring to the reactor using the screws or Faston connectors Is the problem solved Action Ye...

Page 330: ...power of the unit 2 Connect a pressure gauge to the high pressure service port Read the pressure INFORMATION When the unit is operating in heating mode the high pressure port is the gas service port When the unit is operating in cooling defrost mode the high pressure port is the liquid service port 3 Using the graphic below determine the expected sensor output voltage based on the pressure obtaine...

Page 331: ...20 3 6 4 34 4 Measure the voltage on X32A pins 1 3 refrigerant pressure sensor output signal 5 Check that the measured voltage is in line with the expected voltage through the read refrigerant pressure INFORMATION Connect the service monitoring tool to the unit or use field settings mode 1 42 see 6 9 Field settings 4455 to monitor the high pressure If the measured output voltage value matches the ...

Page 332: ...or Prerequisite Stop the unit operation via the central controller Prerequisite Turn OFF the respective circuit breaker Prerequisite Remove the required plate work see 3 15 Plate work 4315 Prerequisite Recuperate the refrigerant from the refrigerant circuit see 4 2 2 Repair procedures 4368 Prerequisite If needed remove any parts or insulation to create more space for the removal 1 Cut all tie stra...

Page 333: ...ION Overheating the pressure sensor will damage or destroy it 4 After soldering is done stop the nitrogen supply after the component has cooled down 5 Route the refrigerant pressure sensor harness towards the appropriate PCB 6 Connect the refrigerant pressure sensor connector to the appropriate PCB 7 Fix the refrigerant pressure sensor harness using new tie straps 8 Add refrigerant to the refriger...

Page 334: ... pressure 3 Using the graphic below determine the expected sensor output voltage based on the pressure obtained in the previous step 2 1 5 1 0 5 0 5 0 0 5 0 0 5 1 1 5 2 2 5 3 3 5 4 a b a Detected pressure MPa b Output voltage V V DC Detected pressure MPa 0 5 0 00 0 6 0 06 0 7 0 12 0 8 0 18 0 9 0 23 1 0 0 29 1 1 0 35 1 2 0 40 1 3 0 46 1 4 0 52 1 5 0 57 1 6 0 63 1 7 0 69 1 8 0 75 1 9 0 80 2 0 0 86 2...

Page 335: ...ld settings 4455 to monitor the low pressure If the measured output voltage value matches the voltage determined through the measured pressure but the pressure via the service monitoring tool is NOT correct replace the applicable PCB The measured voltage is inside the expected range Action Yes Refrigerant pressure sensor is OK Return to the troubleshooting of the specific error and continue with t...

Page 336: ...Cut the refrigerant pressure sensor pipe using a pipe cutter a b a Refrigerant pressure sensor b Refrigerant pressure sensor pipe 4 Remove the refrigerant pressure sensor 5 Supply nitrogen to the refrigerant circuit The nitrogen pressure MUST NOT exceed 0 02 MPa 6 Heat the end of the refrigerant pressure sensor pipe using an oxygen acetylene torch and remove the refrigerant pressure sensor pipe en...

Page 337: ...ng new tie straps 8 Add refrigerant to the refrigerant circuit see 4 2 2 Repair procedures 4368 Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 19 Solenoid valve 3 19 1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform a mechanical check of...

Page 338: ...ith the next step No Replace the solenoid valve coil see 3 19 2 Repair procedures 4339 3 Re connect the solenoid valve connector to the appropriate PCB 4 Turn ON the power using the respective circuit breaker 5 Turn on the unit using the user interface 6 Measure the voltage power supply on the solenoid valve connection on the PCB The measured voltage MUST be 0 V AC when the solenoid valve is close...

Page 339: ...valve is open check with a contact thermometer or by touching if refrigerant flows through the solenoid valve 4 Wait for the solenoid valve to open or close and again perform the above checks Is the solenoid valve operating correctly Action Yes Component is OK Return to the troubleshooting of the specific error and continue with the next step No Replace the solenoid valve body see 3 19 2 Repair pr...

Page 340: ...the solenoid valve body Prerequisite Recuperate the refrigerant from the refrigerant circuit see 4 2 2 Repair procedures 4368 Prerequisite If needed remove any parts or insulation to create more space for the removal 1 Remove the solenoid valve coil see 3 19 2 Repair procedures 4339 2 Cut the solenoid valve body pipes using a pipe cutter b a b a Solenoid valve body b Pipe 3 Remove the solenoid val...

Page 341: ...MUST NOT exceed 0 02 MPa 3 Wrap a wet rag around the solenoid valve body and solder the refrigerant pipes to the solenoid valve body b a b a Solenoid valve body b Pipe CAUTION Overheating the valve will damage or destroy it 4 After soldering is done stop the nitrogen supply after the component has cooled down 5 To install the solenoid valve coil see 3 19 2 Repair procedures 4339 6 Add refrigerant ...

Page 342: ...ess using new tie straps INFORMATION Replace all cable ties that were cut during removal Is the problem solved Action Yes No further actions required No Return to 3 19 1 Checking procedures 4337 of the solenoid valve and continue with the next procedure 3 20 Sub PCB 3 20 1 Checking procedures INFORMATION It is recommended to perform the checks in the listed order To perform a power check of the Su...

Page 343: ...ply terminal to the Sub PCB see 3 20 2 Repair procedures 4345 No Adjust the power supply to the unit see 4 1 2 Repair procedures 4361 To check the HAP LED of the Sub PCB Prerequisite First perform a power check of the Sub PCB see 3 20 1 Checking procedures 4342 1 Locate the HAP LED on the Sub PCB a a HAP LED Does the HAP LED blink in regular intervals approximately 1 Hz Action Yes Return to 3 20 1...

Page 344: ...ia the central controller Prerequisite Turn OFF the respective circuit breaker 1 Check that all wires are properly connected and that all connectors are fully plugged in 2 Check that no connectors or wires are damaged 3 Check that the wiring corresponds with the wiring diagram see 6 2 Wiring diagram 4385 INFORMATION Correct the wiring as needed Is the problem solved Action Yes No further actions r...

Page 345: ... procedures 4342 of the sub PCB and continue with the next procedure Problem solved After all checking procedures listed above have been performed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure 3 20 2 Repair procedures To correct the wiring from the main power supply terminal to the Sub PCB Pr...

Page 346: ... before proceeding see To check the rectifier voltage 4356 2 Locate the Sub PCB 3 Disconnect all connectors from the Sub PCB 4 Carefully pull the Sub PCB at the side and unlatch the PCB supports one by one using a small pair of pliers a a a a a a a PCB support 5 Remove the Sub PCB from the unit 6 To install the Sub PCB see 3 20 2 Repair procedures 4345 To install the Sub PCB 1 Install the Sub PCB ...

Page 347: ...e from the PCB a a Fuse 2 To install a fuse on the Sub PCB see 3 20 2 Repair procedures 4345 To install a fuse on the Sub PCB WARNING For continued protection against risk of fire replace only with same type and rating of fuse 1 Install the fuse on the correct location on the PCB CAUTION Make sure the fuse is plugged in correctly contact with the fuse holder a a Fuse Is the problem solved Action Y...

Page 348: ...ping or ambient for air thermistor Is the thermistor correctly installed thermal contact between the thermistor and the piping Action Yes Perform an electrical check of the specific thermistor see Checking procedures 4348 No Correctly install the thermistor see Repair procedures 4352 To perform an electrical check of the specific thermistor 1 First perform a mechanical check of the thermistor see ...

Page 349: ...r of the subcool heat exchanger R6T Main X30A 7 8 1 Liquid pipe thermistor of the subcool heat exchanger R7T Main X30A 9 10 1 Upper heat exchanger Gas temperature thermistor R8T Main X29A 1 2 1 Lower heat exchanger Gas temperature thermistor R9T Main X29A 3 4 1 Suction temperature thermistor R10T Main X29A 5 6 1 De icer thermistor R11T Sub X15A1 2 1 Compressor suction temperature thermistor R12T S...

Page 350: ...T Main X19A 3 4 2 4 Determine the thermistor resistance that matches the measured temperature Type 1 thermistor T C kΩ T C kΩ T C kΩ T C kΩ 20 197 81 10 39 96 40 10 63 70 3 44 19 18 17 16 15 14 13 12 11 186 53 175 97 166 07 156 80 148 10 139 94 132 28 125 09 118 34 11 12 13 14 15 16 17 18 19 38 08 36 30 34 62 33 02 31 50 30 06 28 70 27 41 26 18 41 42 43 44 45 46 47 48 49 10 21 9 81 9 42 9 06 8 71 ...

Page 351: ...8 13 59 13 04 12 51 12 01 11 52 11 06 61 62 63 64 65 66 67 68 69 4 70 4 54 4 38 4 23 4 08 3 94 3 81 3 68 3 56 Type 2 thermistor T C kΩ T C kΩ T C kΩ T C kΩ 0 5 10 15 20 25 30 35 635 1 496 6 391 310 247 3 198 5 160 2 130 1 40 45 50 55 60 65 70 75 106 2 87 1 71 8 59 5 49 5 41 4 34 8 29 3 80 85 90 95 100 105 110 115 24 9 21 1 18 15 4 13 3 11 4 9 9 8 6 120 125 130 135 140 145 150 7 5 6 5 5 7 5 4 4 3 9...

Page 352: ...istors If the measured resistance value matches the resistance determined through the measured temperature but the temperature for the corresponding thermistor via service checker tool or field settings mode 1 is NOT correct replace the applicable PCB Does the measured resistance of the thermistor match with the temperature determined resistance Action Yes Thermistor is OK Return to the troublesho...

Page 353: ...ctor See connector and pin information of the thermistors at the start of the electrical check procedure and 6 2 Wiring diagram 4385 ALWAYS replace the complete set of thermistors wired to the same connector 8 When removing the complete set of thermistors wired to the same connector Remove all other thermistors wired to the connector from their thermistor holder Disconnect the thermistor connector...

Page 354: ...to the same connector 4 When installing the complete set of thermistors wired to the same connector Install all other thermistors wired to the connector in their thermistor holder Route the thermistor harness of all thermistors towards the appropriate PCB Connect the thermistor connector to the appropriate PCB WARNING When reconnecting a connector to the PCB do NOT apply force as this may damage t...

Page 355: ...ambient temperature close to the outdoor unit 3 Connect the service checker tool to the outdoor unit 4 Read the temperature of the specific PCB fin thermistor The read temperature MUST correspond to the measured ambient temperature Does the temperature of the fin thermistor match with the ambient temperature Action Yes Thermistor is OK Return to the troubleshooting of the specific error and contin...

Page 356: ...aker 4 Measure the voltage between the phases L1 L2 L3 on the power supply terminal X1M The voltage MUST be 400 V AC 10 5 Measure the voltage between each phase and N on the power supply terminal X1M The voltage MUST be 230 V AC 10 6 Unbalance between the phases MUST NOT exceed 2 Is the measured voltage power supply correct Action Yes Return to the troubleshooting of the specific error and continu...

Page 357: ...Power terminal assembly For double fan units 4 Measure the voltage on the rectifier voltage check connector a X5A to check inverter PCB A3P c Result The measured voltage should be below 10 V DC 5 Measure the voltage on the rectifier voltage check connector b X6A to check inverter PCB A6P d Result The measured voltage should be below 10 V DC a d c b a Connector X5A b Connector X6A c Inverter PCB A3...

Page 358: ...ppears on the 16V base line 5 V 16 V F1 F2 terminals on indoor units branch selector boxes outdoor units and central controllers are all possible measurement points Use as many points as you can and take the time necessary for measurement if analyzing with an oscilloscope On outdoor units measurement should be done either at F1 F2 IN or F1 F2 OUT If the F1 F2 OUT terminal is not used then measure ...

Page 359: ... use AC mode if possible 8 Set the triggering mode of the oscilloscope to Normal If Auto mode is selected observed waveforms may be cleared instantaneously leading to misinterpretation of data 9 Ignore very short time pulses of 1V amplitude or less or overshooting at the rising edge may be ignored Focus on the shown points of the waveform below Examples of waveform distortions on D3Net and possibl...

Page 360: ...check the communication between outdoor units Q1 and Q2 are connection terminals for the transmission wiring between multi outdoor units 1 Measure the voltage as shown below VDC Com Ref Q1 X37A 13 V DC Q2 X37A 13 V DC Q1 X37A 3 V DC Q2 X37A 3 V DC c a b d a Terminal Q1 b Terminal Q2 c Connector X37A pin 1 d Connector X37A pin 2 Is the measured voltage correct Action Yes Return to the troubleshooti...

Page 361: ... 2 Repair procedures To adjust the power supply 1 Make sure that the power source is in line with the requirements described in the databook 2 Adjust the power supply within 50 Hz 3 Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure To adjust the wiring between the outdoor unit and the indoor unit...

Page 362: ...tialization If a branch selector box is Power OFF all the indoor units connected to the branch selector box will not be identified no matter if they have power or not If so these units will not be recognized by the outdoor unit upon power restore to this indoor unit 1 Set multimeter to V DC measurement The example below is performed while COM F1 and V DC F2 the polarity will be opposite than the g...

Page 363: ...is procedure takes depends on the amount of indoor units To adjust the wiring between the outdoor units 1 Adjust the wiring according to the wiring diagram and connection diagram see 6 2 Wiring diagram 4385 2 Check that all wires are properly connected 3 Check that no wires are damaged Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific err...

Page 364: ... the unit 4 Activate Heating operation via the Cool Heat master user interface 5 Read the pressure on the high and low pressure gauges If the difference between high and low pressure 0 2 MPa the refrigerant circuit might be clogged 6 On the refrigerant liquid piping between the indoor unit heat exchanger and the outdoor unit heat exchanger coil using a contact thermometer measure the temperature b...

Page 365: ...cy increases on the capacity control Low pressure is maintained at a certain level High pressure drooping control Operating frequency comes to the lowest level Subcooling degree becomes higher The temperature of liquid connection piping becomes lower High pressure gradually rises with increasing operating frequency Low pressure rises with lowering compressor output Operating frequency Low pressure...

Page 366: ... control with low outdoor air Low pressure rises with increasing opening degree of the electronic expansion valve and the operating frequency slightly increases due to the capacity control High pressure decreases due to compressor capacity decreasing Operating frequency comes to the lowest level Heating Frequency Low pressure High pressure Proper amount Higher degree of shortage Degree of refriger...

Page 367: ...replace the refrigerant see 4 2 2 Repair procedures 4368 No Return to the troubleshooting of the specific error and continue with the next procedure To perform a leak test The leak test must satisfy the specifications of EN378 2 1 Perform the two leaks tests below To check for leaks Vacuum leak test 1 Evacuate the system from the liquid and gas piping to 100 7 kPa 1 007 bar 5 Torr absolute for mor...

Page 368: ...Repair procedures 4368 No Return to the troubleshooting of the specific error and continue with the next procedure To check if the refrigerant field piping is conform with the regulations 1 Check if the refrigerant field piping is conform with the regulations Adjust as needed See installation manual for field piping specifications Is the problem solved Action Yes No further actions required No Ret...

Page 369: ...needs to be repaired See also Repair information 4371 for more details Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure To recuperate the refrigerant Prerequisite Stop the unit operation via the central controller 1 Necessary tools Service tool Remark Refrigerant recovery unit Compatible with th...

Page 370: ...very bottle Without this additional setup the discharge line from the recovery device to the refrigerant cylinder would not have been vacuumed 3 Connect the vacuum pump manifold recovery unit and refrigerant recovery cylinder to the service ports of the refrigerant circuit as shown below b c a d j e f c c g h i a Liquid service port b Suction gas service port c Flexible hose d Manifold e Recovery ...

Page 371: ...required No Perform a pressure test of the refrigerant circuit see 4 2 1 Checking procedures 4363 Repair information Refrigerant piping handling Make sure that the applied pressure is never higher than the unit design pressure indicated on the nameplate PS Work according to the F gas regulation and or local regulations Make sure the correct amount of refrigerant is charged after repair according t...

Page 372: ... 99 Additional refrigerant charge amount 1 Once automatic or manual additional refrigerant charge is completed it is necessary to give input to the outdoor unit over the total additional refrigerant charge amount 2 Set field setting 2 14 according to the table below See 6 9 Field settings 4455 Mode 2 14 R410A kg Mode 2 14 R410A kg Mode 2 14 R410A kg 0 No input 7 30 35 14 65 70 1 0 5 8 35 40 15 70 ...

Page 373: ...t s near the indoor unit that may block the airflow Remove the object s as needed Is the problem solved Action Yes No further actions required No Return to the troubleshooting of the specific error and continue with the next procedure To check the required space around the outdoor unit heat exchanger 1 Check if the space around the outdoor unit heat exchanger is sufficient See the installation man...

Page 374: ...y load etc Depending on the above mentioned factors maintenance may be required sooner than the mentioned interval here below The table below also assumes a unit operation of 10 hours day and 2500 hours year Normal use of the unit is considered when a unit is not performing the stop start cycle Thermo OFF and then ON more than 6 times hour Component Inspection Maintenance Electric Motor 1 year 20 ...

Page 375: ...nt temperature and air inlet of outdoor unit heat exchanger is 5K or more consider mounting an air guide at air discharge outlet of the outdoor unit 5 Prior to cleaning check for oil drips on the bottom plate If found check system for signs of refrigerant shortage check possible leaking points and repair when necessary Refer to Repair instructions of the component when necessary 6 Clean the bottom...

Page 376: ...tool for normal operation See 2 4 Symptom based troubleshooting 4198 5 2 2 To clean the cover plates 1 Clean the cover plates with a wet cloth NOTICE To clean the plate work Use water or compressed air not warmer than 50 C Do not use any cleaning agents or chemicals Do not use pressurized water 5 2 3 To clean the outdoor unit heat exchanger 1 Straighten the hair fins 2 Clear the outdoor unit heat ...

Page 377: ...discharge air due to longer supply duct expansion valve is malfunctioning see next step 5 The best way to judge expansion valve bleeding is to operate indoor units in cooling set the dedicated indoor unit to Fan only operation and then check refrigerant thermistors by Service Checker Fan only operated indoor unit sets expansion valve to 0 pulse If the gas thermistor on the indoor unit is close to ...

Page 378: ... there is a filter on the air suction line for the indoor unit Refer to installation manual for the indoor unit INFORMATION When air filters are not cleaned at regular intervals dust begins to accumulate on the indoor unit heat exchanger 17 Check the indoor unit heat exchanger and clean him if necessary see 5 3 3 To clean the indoor unit heat exchanger 4 378 Normally this is not a required step if...

Page 379: ...r interface central controller Prerequisite Turn OFF the power of the branch selector box Prerequisite Turn OFF the respective circuit breaker 1 Prior to cleaning check installation space for oil drips If found check system for signs of refrigerant shortage check possible leaking points and repair as needed 2 Check if any other equipment interferes with the operation of the branch selector box 3 C...

Page 380: ...e necessary 12 Check the DIP switch settings See the installation manual for more information 13 Log the maintenance in the log book After outdoor unit and indoor unit see 5 3 Maintenance procedures for indoor units 4 377 maintenance is performed check the system via the service monitoring tool for normal operation See 2 4 Symptom based troubleshooting 4198 ...

Page 381: ...n Cleaned PCB s heat sink Clean Cleaned Not OK Not OK Not applicable PCB s heat sink Clean Cleaned Unit outside state Clean Cleaned Not OK Not applicable Unit inside state Clean Cleaned Unit outside state Clean Cleaned Tighten electrical connections OK Not OK Unit inside state Clean Cleaned Correct stable water flow OK Not OK Tighten electrical connections OK Not OK Free air circulation OK Not OK ...

Page 382: ...Not OK Not applicable Unit outside state Clean Cleaned Fan motor blades Clean Cleaned Not OK Unit inside state Clean Cleaned Unit outside state Clean Cleaned Tighten electrical connections OK Not OK Unit inside state Clean Cleaned Correct air flow OK Not OK Tighten electrical connections OK Not OK Wireless remote controller batteries OK Not OK Not applicable Correct air flow OK Not OK Service manu...

Page 383: ...d Fan motor blades Clean Cleaned Not OK Tighten electrical connections OK Not OK Unit outside state Clean Cleaned Correct stable water flow OK Not OK Unit inside state Clean Cleaned Tighten electrical connections OK Not OK Correct air flows OK Not OK Remarks Remarks concerning the performed maintenance Signature certified technician Service manual 383 Direct expansion Maintenance VRV ESIE18 15B 20...

Page 384: ...cal data 6 1 Detailed information setting mode 6 1 1 Detailed information setting mode Outdoor unit See the installer reference guide on business portal for more information 6 1 2 Detailed information setting mode Remote controller See the installer reference guide on business portal for more information ...

Page 385: ...ssion F1 F2 outdoor multi transmission Q1 Q2 refer to the installation manual 4 How to use BS1 BS3 switch refer to the Service Precaution label on the electrical component box cover 5 When operating do NOT short circuit the protection devices S1PH S2PH for 14 20 HP only 6 For 5 12 HP When using the optional accessory refer to the installation manual of the optional accessory 6 For 14 20 HP connect...

Page 386: ...H Drain pan heater option F1U F2U A1P Fuse T 3 15 A 250 V F3U Field fuse F101U A4P Fuse F401U F403U A2P Fuse F601U A3P Fuse HAP A P Pilot lamp service monitor is green K3R A1P Magnetic relay Y11S K6R A1P Magnetic relay E3H K7R A1P Magnetic relay E1HC K9R A1P Magnetic relay Y3S K11R A1P Magnetic relay Y2S K12R A1P Magnetic relay Y4S K13R A1P Magnetic relay Y5S L1R Reactor M1C Motor compressor M1F M...

Page 387: ...ensor high S1NPL Pressure sensor low S1PH Pressure switch discharge SEG1 SEG3 A1P 7 segment display T1A Current sensor V1D A3P Diode V1R A3P A4P Power module X A Connector X1M Terminal block X1M A1P Terminal block control Y1E Electronic expansion valve heat exchanger upper Y2E Electronic expansion valve subcool heat exchanger Y3E Electronic expansion valve heat exchanger lower Y4E Electronic expan...

Page 388: ...3H Drain pan heater option F1U F2U A1P Fuse T 3 15 A 250 V F1U A8P Fuse T 3 15 A 250 V F3U Field fuse F101U A4P A7P Fuse F401U F403U A2P A5P Fuse F601U A3P A6P Fuse HAP A P Pilot lamp service monitor is green K3R A3P A6P Magnetic relay K3R A1P Magnetic relay Y12S K4R A1P Magnetic relay Y11S K6R A1P Magnetic relay E3H K7R A1P Magnetic relay E1HC K8R A1P Magnetic relay E2HC K9R A1P Magnetic relay Y3...

Page 389: ... R13T Thermistor receiver gas R14T Thermistor auto charge R15T only 18 20 HP Thermistor compressor body R21T R22T Thermistor M1C M2C discharge S1NPH Pressure sensor high S1NPL Pressure sensor low S1PH S2PH Pressure switch discharge SEG1 SEG3 A1P 7 segment display T1A Current sensor V1D A3P A6P Diode V1R A3P A4P A6P A7P Power module X A Connector X1M Terminal block X1M A1P Terminal block control Y1...

Page 390: ...ry ESIE18 15B 2020 05 Y5S Solenoid valve heat exchanger upper Y11S Solenoid valve M1C oil return Y12S Solenoid valve M2C oil return Z C Noise filter ferrite core Z F A2P A5P Noise filter with surge absorber Connector for optional accessories X10A Connector bottom plate heater ...

Page 391: ...al 391 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 REMQ5U REYQ8 12U 2D120651A indoor F1 F2 outdoor F1 F2 Front side Rear side outdoor Q1 Q2 Note 7 Note 8 Note 3 Note 5 Note 6 Note 3 Note 3 ON ON OFF OFF El compo box ...

Page 392: ...20 05 REYQ14 20U 2D120652A indoor F1 F2 outdoor F1 F2 outdoor Q1 Q2 Note 7 Note 3 Note 7 Note 5 Note 5 Note 10 Note 6 Note 6 Note 9 Note 3 Note 3 ON ON OFF OFF to in d unit el compo box outer shell M1C M2C Terminal of M1C M2C Layout of M1C M2C M1F M2F El compo box to out d unit to multi unit ...

Page 393: ...gs are as follows On Off On Off On Off For using DIP switch DS1 DS2 refer to installation manual or service precaution label on EL Compo box cover Symbols Field wiring Terminal block Connector Terminal Protective earth Legend for wiring diagram BS1Q A A1P Printed circuit board DS1 DIP switch F1U Fuse T 3 15 A 250 V PS Switching power supply X1M Terminal strip X1M A1P Terminal strip control X2M Ter...

Page 394: ... diagram English Translation Indoor unit Indoor unit Outdoor unit Outdoor unit See note See note BS unit top BS unit top Power supply Power supply To outdoor unit To outdoor unit To indoor unit To indoor unit BS unit top See note 7 See Note 3 To indoor unit To outdoor unit Indoor unit Outdoor unit Power supply 220 240V 50 Hz ...

Page 395: ...1P remove the short circuit connector and connect the air conditioner stop signal optional product For details please refer tot he operation manual attached to the kit Symbols Field wiring Terminal block Connector Terminal Protective earth Legend for wiring diagram BS4 16Q A A1P A2P A3P A4P Printed circuit board Control C1 Capacitor DS1 DS2 DIP switch F1U Fuse T 3 15 A 250 V PS Switching power sup...

Page 396: ...Y39E Y42E Y45E Y48E Electric expansion valve Sub cool Optional accessories X15A Connector drain up kit abnormal signal Translation of text on wiring diagram English Translation Indoor Indoor Outdoor Outdoor Outdoor unit Outdoor unit Note x Note x LAYOUT OF EL COMPO BOX LAYOUT OF EL COMPO BOX Power supply Power supply ON ON OFF OFF OR OR BS unit BS unit ...

Page 397: ...BS4Q14A Power Supply Power supply indoor F1 F2 A unit indoor F1 F2 B unit indoor F1 F2 C unit indoor F1 F2 D unit outdoor F1 F2 outdoor unit BS unit F1 F2 BS unit BS unit F1 F2 Note3 Note3 Note3 Note3 Note3 Note3 OR t i n u C t i n u D t i n u B t i n u A LAYOUT OF EL COMPO BOX X15A Note 5 ON OFF ON ON ON note 5 OFF OFF OFF ...

Page 398: ...Outdoor F1 F2 Outdoor unit Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 ON ON ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF Power Supply Note 5 OFF OFF OFF OFF OFF OFF ON ON ON ON TO X4A A1P TO X5A A1P ON ON t i n u G t i n u H t i n u C t i n u D E unit E unit F unit F unit A unit B unit Indoor F1 F2 E unit Indoor F1 F2 F unit BS unit F1 F2 BS unit BS un...

Page 399: ...r F1 F2 I unit Indoor F1 F2 J unit Outdoor F1 F2 Outdoor unit BS unit F1 F2 BS unit Case of BS10Q14AV1 Case of BS12Q14AV1 X15A Note 5 LAYOUT OF EL COMPO BOX Note3 Note3 Note3 Note3 Note3 Note3 or Indoor F1 F2 L unit Indoor F1 F2 K unit Indoor F1 F2 J unit Indoor F1 F2 I unit Outdoor F1 F2 Outdoor unit BS unit F1 F2 BS unit or BS unit F1 F2 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Indoor F1 ...

Page 400: ...unit Indoor F1 F2 M unit Indoor F1 F2 N unit Indoor F1 F2 O unit Indoor F1 F2 P unit Outdoor F1 F2 Outdoor unit BS unit F1 F2 BS unit X15A Note 5 LAYOUT OF EL COMPO BOX Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 Note3 or Indoor F1 F2 L unit Indoor F1 F2 K unit Indoor F1 F2 J unit Indoor F1 F2 I unit or BS unit F1 F2 3 e t o N 3 e t o N 3 e t o N 3 e t o N 3 e t o N Note3 Note3 Note3 Indoor F1...

Page 401: ...0 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 6 3 Piping diagram 6 3 1 Piping diagram Outdoor unit Piping diagram 5 12 HP a b d e c a Stop valve liquid b Service port c Stop valve high pressure low pressure d Stop valve gas e Charge port ...

Page 402: ...Service manual 402 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 Piping diagram 14 20 HP a b d e c a Stop valve liquid b Service port c Stop valve high pressure low pressure d Stop valve gas e Charge port ...

Page 403: ...rt Stop valve Filter Check valve Pressure relief valve Thermistor Solenoid valve Heat sink PCB Capillary tube Expansion valve 4 way valve Propeller fan High pressure switch Low pressure sensor High pressure sensor Oil separator Accumulator Heat exchanger Compressor Double tube heat exchanger Distributor Liquid receiver ...

Page 404: ...sion valve sub cool PI proportional integral control to keep outlet superheat on sub cool heat exchanger Y3E Electronic expansion valve lower heat exchanger While in heating operation PI proportional integral control is applied to keep the outlet superheat degree of lower heat exchanger constant Y4E Electronic expansion valve receiver gas purge Used to collect refrigerant to the receiver Y5E Elect...

Page 405: ...t condition R21T Thermistor M1C discharge Detects discharge temperature of the compressor R22T Thermistor M2C discharge Detects discharge temperature of the compressor R3T Thermistor liquid main Used to detect pipe temperature of receiver inlet R4T Thermistor upper heat exchanger liquid pipe This detects temperature of liquid pipe between the air heat exchanger and upper heat exchanger electronic ...

Page 406: ...ompressor suction pipe temperature R13T Thermistor receiver gas purge Detects gas pipe temperature of receiver R15T Thermistor M1C body Detects compressor body temperature Acts as safety for overheated operation of compressor Liquid service port Service port liquid pipe to field liquid piping Dual gas service port Service port dual gas pipe to field dual gas piping Low pressure gas service port Se...

Page 407: ...P S1NPH S1NPL S1PH HPS Y3S M1F Y2S SV SV M Y4E EVL 4 5 6 c b a 1 2 3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor unit unit OFF fan OFF indoor electronic expansion valve 0 pulse 2 Indoor unit unit ON cooling thermo OFF fan ON indoor electronic expansion valve 0 pulse 3 Indoor unit unit ON cooling thermo ON fan ON Indoor electronic expansion valve superheat Control 4 Branch selector box electronic e...

Page 408: ...lve high pressure OFF electronic expansion valve low pressure OFF 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E Superheat control Y3E Subcool Control 0 pulse in low load Y4E 0 Pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF ON in low load Y5S OFF ...

Page 409: ...it Unit OFF Fan OFF Indoor electronic expansion valve 192 pulse 2 Indoor Unit Unit ON Heating Thermo OFF Fan Low Load Speed Indoor electronic expansion valve 192 pulse 3 Indoor Unit Unit ON Heating Thermo ON Fan ON 4 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pressure OFF 5 Branch selector box electronic expansion valve high pressure OFF electro...

Page 410: ...1B VRV IV Heat Recovery ESIE18 15B 2020 05 Y1E Superheat Control Subcool Control in low loads Y2E Superheat control Y3E Superheat Control 0 pulse in low load Y4E Gas Purge Control Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S ON Y5S ON OFF in low load ...

Page 411: ...C EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit ON Heating Thermo OFF Fan Low Load Speed Indoor EEV 192 pulse 2 Indoor Unit Unit ON Heating Thermo ON Fan ON 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON 4 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pressure OFF 5 Branch selector box electronic expansion valve high pressure ON electronic expansion...

Page 412: ...evaporator or Subcool Control when heat exchanger is condenser Y2E Superheat control Y3E Superheat Control when heat exchanger is evaporator or Subcool Control when heat exchanger is condenser Y4E Gas Purge Control Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S ON Lower heat exchanger is evaporator Y5S OFF Upper heat exchanger is condenser ...

Page 413: ... EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 192 pulse 2 Indoor Unit Unit ON Cooling Thermo OFF Fan ON Indoor electronic expansion valve 192 pulse 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON Indoor electronic expansion valve superheat control 4 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low p...

Page 414: ...Heat Recovery ESIE18 15B 2020 05 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E 0 pulse Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF Y5S OFF ...

Page 415: ... b a 1 2 3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 224 pulse 2 Indoor Unit Unit ON Heating Thermo OFF Fan ON Indoor electronic expansion valve 224 pulse 3 Indoor Unit Unit ON Heating Thermo ON Fan ON Indoor electronic expansion valve Open 4 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pres...

Page 416: ...V Heat Recovery ESIE18 15B 2020 05 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E OFF Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF Y5S OFF ...

Page 417: ...door Unit Unit ON Heating Thermo OFF Fan ON Indoor electronic expansion valve 224 pulse 2 Indoor Unit Unit ON Heating Thermo ON Fan ON Indoor electronic expansion valve subcool Control 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON Indoor electronic expansion valve superheat Control 4 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure OFF subcoo...

Page 418: ...8 15B 2020 05 6 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pressure ON subcool electronic expansion valve OFF Y1E Superheat Control Y2E OFF Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S OFF Y5S ON ...

Page 419: ...3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 0 pulse 2 Indoor Unit Unit ON Cooling Thermo OFF Fan ON Indoor electronic expansion valve 0 pulse 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON Indoor electronic expansion valve superheat control 4 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pre...

Page 420: ...B 2020 05 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E Superheat Control Y3E Subcool Control 0 pulse in low load Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF ON in low load Y5S OFF ...

Page 421: ... 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 192 pulse 2 Indoor Unit Unit ON Heating Thermo OFF Fan Low Load speed Indoor electronic expansion valve192 pulse 3 Indoor Unit Unit ON Heating Thermo ON Fan ON 4 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pressure OFF 5 Branch selector box electronic expansion valve high pressure ...

Page 422: ...1B VRV IV Heat Recovery ESIE18 15B 2020 05 Y1E Superheat Control Subcool control in low loads Y2E Superheat Control Y3E Superheat Control 0 pulse in low load Y4E Gas Purge Control Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S ON Y5S ON OFF in low load ...

Page 423: ...3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit ON Heating Thermo OFF Fan Low Load Speed Indoor EEV 192 pulse 2 Indoor Unit Unit ON Heating Thermo ON Fan ON 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON 4 Branch selector box electronic expansion valve high pressure OFF electronic expansion valve low pressure OFF 5 Branch selector box electronic expansion valve high pressure ON electronic ...

Page 424: ...evaporator or Subcool Control when heat exchanger is condenser Y2E Superheat control Y3E Superheat Control when heat exchanger is evaporator or Subcool Control when heat exchanger is condenser Y4E Gas Purge Control Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S ON Lower heat exchanger is evaporator Y5S OFF Upper heat exchanger is condenser ...

Page 425: ... a 1 2 3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 192 pulse 2 Indoor Unit Unit ON Cooling Thermo OFF Fan ON Indoor electronic expansion valve 192 pulse 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON Indoor electronic expansion valve superheat Control 4 Branch selector box electronic expansion valve high pressure ON electronic expansion val...

Page 426: ...Heat Recovery ESIE18 15B 2020 05 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E 0 pulse Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF Y5S OFF ...

Page 427: ...L 4 5 6 c b a 1 2 3 EVH EVSC EVL EVH EVSC EVL EVH EVSC 1 Indoor Unit Unit OFF Fan OFF Indoor electronic expansion valve 224 pulse 2 Indoor Unit Unit ON Heating Thermo OFF Fan ON Indoor electronic expansion valve 224 pulse 3 Indoor Unit Unit ON Heating Thermo ON Fan ON Indoor electronic expansion valve Open 4 Branch selector box electronic expansion valve high pressure ON electronic expansion valve...

Page 428: ...V Heat Recovery ESIE18 15B 2020 05 6 Branch selector box electronic expansion valve high pressure ON electronic expansion valve low pressure ON Y1E Subcool Control Y2E OFF Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S ON Y4S OFF Y5S OFF ...

Page 429: ...EVSC 1 Indoor Unit Unit ON Heating Thermo OFF Fan ON Indoor electronic expansion valve 224 pulse 2 Indoor Unit Unit ON Heating Thermo ON Fan ON Indoor electronic expansion valve subcool control 3 Indoor Unit Unit ON Cooling Thermo ON Fan ON Indoor electronic expansion valve superheat Control 4 Branch selector box electronic expansion high pressure valve ON electronic expansion valve low pressure O...

Page 430: ...8 15B 2020 05 6 Branch selector box electronic expansion high pressure valve OFF electronic expansion valve low pressure ON Subcool electronic expansion valve OFF Y1E Superheat Control Y2E OFF Y3E Subcool Control Y4E 0 pulse Y5E Heat Sink Cooling Control Y2S ON Y3S OFF Y4S OFF Y5S ON ...

Page 431: ...onic expansion valve HPS High pressure switch M1C Compressor 1 M2C Compressor 2 M1F Fan motor 1 M2F Fan motor 2 R1T Thermistor air R10T Thermistor Suction R11T Thermistor heat exchanger de icer R12T Thermistor Compressor Suction R13T Thermistor Receiver gas purge R14T Auto charge Thermistor R15T Thermistor M1C Body R21T Thermistor M1Cdischarge R22T Thermistor M2C discharge R3T Thermistor accumulat...

Page 432: ...e pipe connections b Gas pipe indoor unit side pipe connections c Liquid pipe outdoor unit side pipe connections d High pressure low pressure gas pipe outdoor unit side pipe connections e Suction gas pipe outdoor unit side pipe connections f Subcool heat exchanger double tube g Filter h Subcool electronic expansion valve i High pressure low pressure pipe upper electronic expansion valve j Suction ...

Page 433: ...t side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pipe connections d Filter e Subcool heat exchanger double tube f Subcool electronic expansion valve g Suction pipe electronic expansion valve h High pressure low pressure electronic expansion valve i1 j1 Indoor unit A i2 j2 Indoor unit B i3 j3 Indoor unit C j4 j4 In...

Page 434: ...unit side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pipe connections d Filter e Subcool heat exchanger double tube f Subcool electronic expansion valve g Suction pipe electronic expansion valve h High pressure low pressure electronic expansion valve i1 j1 Indoor Unit A i2 j2 Indoor Unit B i3 j3 Indoor Unit C i4 j4...

Page 435: ...it side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pipe connections d Filter e Subcool heat exchanger double tube f Subcool electronic expansion valve g Suction pipe electronic expansion valve h High pressure low pressure electronic expansion valve i1 j1 Indoor unit A i2 j2 Indoor unit B i3 j3 Indoor unit C j4 j4 I...

Page 436: ...t side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pipe connections d Filter e Subcool heat exchanger double tube f Subcool electronic expansion valve g Suction pipe electronic expansion valve h High pressure low pressure electronic expansion valve i1 j1 Indoor unit A i2 j2 Indoor unit B i3 j3 Indoor unit C j4 j4 In...

Page 437: ... e f d e f d e f d e f d e f d h j8 i9 j9 i10 j10 i11 j11 i12 j12 a Liquid pipe outdoor unit side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pipe connections d Filter e Subcool heat exchanger double tube f Subcool electronic expansion valve g Suction pipe electronic expansion valve h High pressure low pressure elec...

Page 438: ...20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 i5 j5 Indoor unit E i6 j6 Indoor unit F i7 j7 Indoor unit G i8 j8 Indoor unit H i9 j9 Indoor unit I i10 j10 Indoor unit J i11 j11 Indoor Unit K i12 j12 Indoor Unit L i gas pipe j liquid pipe ...

Page 439: ...d d d c b a d g g g g g g g g g g h h h h h h h h h g h g g g g g h h h h h e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d e f d h j8 i9 j9 i10 j10 i11 j11 i12 j12 i13 j13 i14 j14 i15 j15 i16 j16 a Liquid pipe outdoor unit side pipe connections b Suction gas pipe outdoor unit side pipe connections c High pressure low pressure gas pipe outdoor unit side pi...

Page 440: ...lve h High pressure low pressure electronic expansion valve i1 j1 Indoor unit A i2 j2 Indoor unit B i3 j3 Indoor unit C j4 j4 Indoor unit D i5 j5 Indoor unit E i6 j6 Indoor unit F i7 j7 Indoor unit G i8 j8 Indoor unit H i9 j9 Indoor unit I i10 j10 Indoor unit J i11 j11 Indoor Unit K i12 j12 Indoor Unit L i13 j13 Indoor Unit M i14 j14 Indoor Unit N i15 j15 Indoor Unit O i16 j16 Indoor Unit P i gas ...

Page 441: ...lve Y4S g Main liquid pipe thermistor R3T h Low pressure sensor i High pressure low pressure gas pipe 4 way valve Y3S j Compressor suction thermistor R12T k High pressure switch l Receiver gas thermistor R13T m Gas pipe thermistor of the subcool heat exchanger gas R6T n Air thermistor R1T o Electronic expansion valve auto charge Y6E p Electronic expansion valve lower heat exchanger Y3E q Compresso...

Page 442: ...Q5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 z aa bb cc dd z Electronic expansion valve receiver gas Y4E aa Electronic expansion valve liquid cooling Y5E bb Electronic expansion valve subcool Y2E cc Solenoid valve liquid pipe Y2S dd Fan motor M1F ...

Page 443: ...ic expansion valve subcool Y2E i Solenoid valve liquid pipe Y2S j Oil return valve M2C Y12S k High pressure switch l Receiver gas thermistor R13T m Compressor M1C a n o r s t w y u l q p j b c o u k cc m v x z aa bb d f e g h i a Lower heat exchanger 4 way valve Y4S b Upper heat exchanger 4 way valve Y5S c High pressure low pressure4 way valve Y3S d Electronic expansion valve auto charge Y6E e Ele...

Page 444: ...h S1PH r High pressure switch S2PH s Gas pipe thermistor of the subcool heat exchanger R6T t Main liquid pipe thermistor R3T u Low pressure sensor v Oil return valve M1C Y11S w Compressor M2C discharge thermistor R22T x Compressor M1C discharge thermistor R21T y Liquid pipe thermistor of the subcool heat exchanger R7T z Compressor M2C body thermistor R15T aa Compressor M2C bb Compressor M1C cc De ...

Page 445: ...Single fan units a d e f g h i j k l F a c c b b R a Switchbox F Front view b Fan motor M1F R Rear view c Compressor M1C d Sub PCB A5P e Main PCB A1P f Rectifier voltage check connector X3A g Main supply connection terminal X1M h M1F connector X1A i Reactor L1R j Noise filter PCB A2P k Fan inverter PCB A4P l Inverter PCB A3P ...

Page 446: ...c Fan motor M2F h M1F connector X1A d Compressor M2C i Fan inverter PCB for M1F A4P e Compressor M1C j Noise filter PCB A5P k Rectifier voltage check connector for A6P X6A l Noise filter PCB A2P m Rectifier voltage check connector for A3P X5A n Reactor L2R for A6P o Main supply connection terminal X1M p M2F connector X2A q Fan inverter PCB for M2F A7P r Inverter PCB for M2C A6P s Inverter PCB for ...

Page 447: ...manual 447 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 6 5 3 Branch selector box BS1Q A b a a X1M b A1P BS4Q A a d b c a X1M b X3M c X4M d X2M e A1P BS6Q A BS8Q A a e f b c d a X1M b X3M c X4M d X2M e A1P f A2P ...

Page 448: ...8 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 BS10Q A BS12Q A a f g h b c d e a X1M b X3M c X4M c X4M d X5M d X2M e A1P f A2P f A3P BS16Q A g h i b c d e j f a a X1M b X3M c X4M d X5M d X6M d X2M e A1P f A2P f A3P f A4P ...

Page 449: ...or Low pressure protection Low pressure 0 07 MPa Retry 3 times in 60 minutes E4 Drop control Low pressure 0 35 MPa in cooling mode Reset Low pressure 0 4 MPa Drop control Low pressure 0 17 MPa in heating mode Reset Low pressure 0 23 MPa Drop control Low pressure 0 07 MPa 4th retry in 60 minutes E4 Forced stop M1C M2C Compressor JT16KBVDYR S Current protection Current 28 A Drop control M1C M2C Comp...

Page 450: ...ermistor Overheat protection Temperature 120 C for 2 times within 10 minutes Reset Temperature 100 C F3 Forced stop A3P A6P A4P A7P Radiation fin temperature Overheat protection Temperature 110 C Reset Temperature 107 C Drop control Temperature 114 C L4 Forced stop Drop control is visible through service checker tool Retries are monitored by field setting Mode 1 monitor mode 1 23 24 25 See 6 9 Fie...

Page 451: ...6 Technical data Service manual 451 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 6 7 Field information report See next page ...

Page 452: ...ation is required Please fill out the following form before contacting your distributor FIELD INFORMATION REPORT Key person information Name Company name Your contact details Phone number E mail address Site address Your reference Date of visit Claim information Title Problem description Error code Trouble date Problem frequency Investigation steps done Insert picture of the trouble Current situat...

Page 453: ...ursement Piping layout Wiring layout simple schematic Unit Installation information Model name Serial number Installation commissioning date Software version user interface Software version outdoor PCB Provide pictures of the field settings overview viewable on the user interface ...

Page 454: ...ce tools check the Business Portal http www mydaikin eu 2 Go to the tab After sales support on the left navigation pane and select Technical support 3 Click the button Service tools An overview of the available service tools for the different products is shown Also additional information on the service tools instruction latest software can be found here ...

Page 455: ...er see the installer reference guide of the specific controller and the indoor unit installer reference guide for more information 6 9 2 To use mode 1 Mode 1 is used to monitor the status of the unit What How Changing and accessing the setting in mode 1 Once mode 1 is selected push BS1 one time you can select the wanted setting It is done by pushing BS2 Accessing the selected setting s value is do...

Page 456: ... setting It is done by pushing BS2 Accessing the selected setting s value is done by pushing BS3 1 time To quit and return to the initial status Press BS1 Changing the value of the selected setting in mode 2 Once mode 2 is selected push BS1 for more than 5 seconds you can select the wanted setting It is done by pushing BS2 Accessing the selected setting s value is done by pushing BS3 1 time Now BS...

Page 457: ...ase of 2 18 default value is 0 which means the function is not active Result Mode 2 setting 18 is addressed and selected return value e g 0 is the current setting situation 5 To change the value of the setting push BS2 till the required value appears on the 7 segment display indication When achieved define the setting value by pushing BS3 1 time To start operation according to the chosen setting c...

Page 458: ...t 1 00 Undefined 0 Main unit 1 Sub 1 unit 2 Sub 2 unit 1 Low noise operation status 1 01 0 Not in low noise operation 1 In low noise operation 2 Demand operation status 1 02 0 Not in demand operation 1 In demand operation 3 Automatic back up operation status 1 03 0 Off 1 On 4 Defrost selection set 1 04 0 Slow 1 Normal 2 Quick 5 Te set 1 05 0 Automatic 1 3 C 2 6 C 3 7 C 4 8 C 5 9 C 6 10 C 7 11 C 6 ...

Page 459: ...er code 1 20 Use set BS2 to view full code 21 Outdoor unit capacity 1 21 0 No data 3 8 HP 4 10 HP 5 12 HP 6 14 HP 7 16 HP 8 18 HP 9 20 HP 22 Software id lower code 1 22 Displays lower code for software ID 23 Latest retry 1 23 Displays latest reason causing retry 24 2nd latest retry 1 24 Displays 2nd latest reason causing retry 25 3rd latest retry 1 25 Displays 3rd latest reason causing retry 26 Nu...

Page 460: ...t of range 38 Number of connected RA units 1 38 RA units connected through BP unit Possible 0 63 39 Number of connected HXY A unit 1 39 VRV LT Hydrobox unit Possible 0 63 40 Cooling comfort set 1 40 Setting by mode 2 81 Possible 0 3 41 Heating comfort set 1 41 Setting by mode 2 82 Possible 0 3 42 High pressure MPa 1 42 S1NPH 43 Low pressure MPa 1 43 S1NPL 44 Compressor frequency Hz 1 44 Total freq...

Page 461: ...n 2 00 0 Individual 1 Master DTA104A6 option required 2 Slave DTA104A6 option required 1 Cool heat unified address 2 01 0 Possible 0 31 2 Low noise demand address 2 02 0 Possible 0 31 5 Indoor unit forced fan H 2 05 0 Disabled 1 Enabled 6 Indoor unit forced thermo ON 2 06 0 Disabled 1 Enabled 8 Te setting 2 08 0 Auto 1 3 C 2 6 C 3 7 C 4 8 C 5 9 C 6 10 C 7 11 C 9 Tc setting 2 09 0 Auto 1 41 C 2 42 ...

Page 462: ...27 level1 level2 level3 2 22 0 Off 1 Level 1 2 Level 2 3 Level 3 25 Low noise operation level setting if LNO triggered by external input combined with 2 12 level1 level2 level3 2 25 1 Level 1 2 Level 2 3 Level 3 26 Nighttime low noise operation start time setting combined with 2 22 2 26 1 20h00 2 22h00 3 24h00 27 Nighttime low noise operation stop time setting combined with 2 22 2 27 1 6h00 2 7h00...

Page 463: ...eration 1 Inverter 1 M1C OFF 2 Inverter 2 M2C OFF 3 Main unit off 39 Emergency operation sub 1 unit 2 39 0 Not in emergency operation 1 Inverter 1 M1C OFF 2 Inverter 2 M2C OFF 3 Sub 1 unit OFF 40 Emergency operation sub 2 unit 2 40 0 Not in emergency operation 1 Inverter 1 M1C OFF 2 Inverter 2 M2C OFF 3 Sub 2 unit OFF 45 Technical cooling 2 45 0 Disabled 1 Enabled 47 Te setting during parallel hea...

Page 464: ... at X10A 70 Capacity less heating 2 70 0 Off 1 Operation off 2 Thermo off 3 Operation off thermo off 81 Cooling comfort setting 2 81 0 Eco 1 Mild 2 Quick 3 Powerful 82 Heating comfort setting 2 82 0 Eco 1 Mild 2 Quick 3 Powerful 83 Cool heat master allocation in case VRV RA installed together 2 83 0 VRV 1 RA 84 BP initial EV opening in heating mode 2 84 0 400 pls 1 500 pls 2 600 pls 3 300 pls 85 T...

Page 465: ...anual 465 REYQ8 20 REMQ5U7Y1B VRV IV Heat Recovery ESIE18 15B 2020 05 N Item Display Content 88 Detailed refrigerant check during test run 2 88 0 Enabled 1 Disabled 90 Multi tenant setting soft 2 90 0 Disabled 1 Enabled 24 hours ...

Page 466: ...nation heavy LL 1250 hr flat 100 hr 1 Long life filter type 01 Long life filter 02 Super long life filter 04 Oil guard filter 2 Air thermistor selection 01 Combined control 02 Only the return air thermistor 03 Only the remote controller thermistor 3 Display filter sign 01 Display 02 No display 4 Spare 5 Remote controller thermistor visible by central control device in group wiring P1P2 01 No 02 Ye...

Page 467: ...ity presence sensor 01 High sensitive 02 Low sensitive 03 Standard 04 Disable presence sensor 7 Airflow adjustment 01 Manual setting see mode 23 6 below 02 ESP auto judgment completed 03 Start ESP auto judgment if control set to fan only ON 8 Compensation by floor sensor 01 Floor sensor disabled 02 Air suction temperature priority 03 Standard 04 Floor temperature priority 9 Compensation of floor t...

Page 468: ... input 04 Forced OFF multi tenant 2 Thermostat differential to set point 01 1 0 C FXFQ FXZQ FXCQ FXKQ FXUQ FXHQ VKM Biddle 02 0 5 C FXSQ FXMQ FXAQ FXLQ FXNQ FXDQ EKEQM 3 OFF by thermostat fan speed 01 LL 02 Set fan speed 03 OFF 4 Automatic mode differential 01 0 C 02 1 C 03 2 C 04 3 C 05 4 C 06 5 C 07 6 C 08 7 C 5 Auto restart after power failure 01 Disabled 02 Enabled 6 Fan speed in cooling therm...

Page 469: ...n setting if 4 swing motors 01 All direction simultaneously swing 02 03 Opposite sides synchronization swing 3 Output to flap motor 01 Enabled 02 Disabled 03 4 Air flow position setting 01 Draft prevention 02 Standard 03 Ceiling soiling prevention 5 ESP setting phase control motor 01 Standard 02 Increase step 1 03 Increase step 2 04 6 External static pressure manual set 01 02 50 Pa 03 60 Pa 04 70 ...

Page 470: ...ed 02 Equipped 1 Thermostat OFF excess humidity 01 Not equipped 02 Equipped 2 Direct duct connection 01 Not equipped 02 Equipped 3 Drain pump operation heating operation if humidifier is used 01 Not equipped 02 Equipped 4 Filter sign 01 By timer 02 By external input 5 Independent ventilation 01 Not equipped 02 Equipped 6 Independent unit 01 No 02 Yes 9 Demand control 01 Not equipped 02 Equipped ...

Page 471: ...1 01 01 01 01 01 01 1 02 01 01 01 01 02 01 01 01 01 04 01 01 02 04 2 02 02 01 02 01 02 01 02 01 02 02 02 01 01 02 3 01 01 03 01 01 02 01 01 01 01 01 02 na 01 01 4 01 03 01 02 03 03 01 01 01 01 01 03 01 01 03 5 02 02 02 02 02 02 02 02 02 02 02 02 02 02 02 6 na 02 02 01 02 02 02 02 02 na 02 na na 02 02 7 na 01 01 01 01 01 01 01 01 na 01 na na 01 01 8 na 01 01 01 01 01 01 01 01 na 01 na na 01 01 9 01...

Page 472: ...VKM Biddle EKEQM 25 0 na 02 02 02 02 01 02 02 02 na na na na na na 1 01 01 01 01 01 02 01 01 01 01 01 02 01 01 02 2 na 01 01 na 01 na 01 01 01 01 na na na na na 3 01 01 01 01 01 01 01 01 01 01 01 01 02 01 02 4 na 01 01 01 01 01 01 01 01 01 na na na na na 5 01 01 01 01 01 01 01 01 01 01 01 01 01 01 02 6 01 01 01 01 01 01 01 01 01 01 01 01 01 01 02 7 spare 8 spare 9 01 01 01 na na 01 01 01 01 01 01 ...

Page 473: ......

Page 474: ......

Page 475: ......

Search results

Summary of Contents for VRV IV+

Reviews:

Related manuals for VRV IV+

Brands by name

Popular brands

Daikin VRV IV+, Service Manual

Search results

Summary of Contents for VRV IV+

Reviews:

Related manuals for VRV IV+

Brands by name

Popular brands