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Panasonic U-4LE1R8, Service Manual

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Panasonic U-4LE1R8 Service Manual Download Page 99

Mini VRF SYSTEM

PCB Settings

4

1. Outdoor Unit Control PCB 

4-7

 LED1, 2
(D302, D303)

LED (red × 2) 

LED 1 and 2 blink alternately while automatic address setting is in progress.

Display the alarm contents for alarms that are detected by the outdoor unit.

•

•

Power LED
(D514)

LED (green): Power indicator
Indicates the DC 5V power on the outdoor unit control PCB.

 RUN

2P plug : Start pin
Short-circuit this pin and apply a pulse signal to start all indoor units in that refrigerant 
system.

 STOP

2P plug : Stop pin
Short-circuit this pin and apply a pulse signal to stop all indoor units in that refrigerant 
system.

CHK

2P plug (black)
Short-circuit during the test run operation. 
Open the circuit after the test run.

SILENT
(CN-SILENT)

2P plug (White) : Socket for silent mode

CN-OPTION 1, 2

Plug for Demand Terminal (optional CZ-CAPDC3)

Used for installing the external timer for the silent mode.
(Refer to the section 1-14. Servicing and Maintenance Functions in service manual.)

 AP

2P plug : Vacuuming pin

To perform vacuuming of the outdoor unit, short-circuit this pin and then turn the 
power ON. All solenoid valves turn ON and vacuuming begins smoothly. (Do not 
perform automatic address setting at this time.)

Release the short-circuit to return the unit to normal status.

•

•

MODE

2P plug : Indoor unit Heating/Cooling mode change pin

When operating the compressors to perform automatic address setting, operation 
in Heating mode can be normally used. However, short-circuiting this pin performs 
operation in Cooling mode. (Static signal)

Short-circuiting this pin during ordinary operation changes the mode from Cooling 
to Heating (if the current mode is Cooling) or from Heating to Cooling (if the 
current mode is Heating).

•

•

TEST

2P plug 

This pin is used to test the PCB at the factory.

When the power is turned ON after this pin has been short-circuited, all output 
signals will be output in sequence. (Sequential output does not occur if this pin is 
short-circuited when the power is already ON.) Releasing this pin returns the unit 
to normal control.

•

•

SM830209-00̲Mini̲VRF SYS.indb   7

SM830209-00̲Mini̲VRF SYS.indb   7

2012/01/11   18:26:37

2012/01/11   18:26:37

Summary of Contents for U-4LE1R8

Page 1: ... Mounted S 22MK1E5 S 28MK1E5 S 36MK1E5 S 45MK1E5 S 56MK1E5 S 73MK1E5 S 106MK1E5 R1 Concealed Floor Standing S 22MR1E5 S 28MR1E5 S 36MR1E5 S 45MR1E5 S 56MR1E5 S 71MR1E5 P1 Floor Standing S 22MP1E5 S 28MP1E5 S 36MP1E5 S 45MP1E5 S 56MP1E5 S 71MP1E5 Y1 4 Way Cassette 60 60 S 22MY1E5 S 28MY1E5 S 36MY1E5 S 45MY1E5 S 56MY1E5 M1 Slim Low Static Ducted S 22MM1E5 S 28MM1E5 S 36MM1E5 S 45MM1E5 S 56MM1E5 E1 H...

Page 2: ...roperty damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including fail...

Page 3: ...malfunction of this appliance do not repair by yourself Contact to the sales dealer or service dealer for a repair CAUTION Do not touch the air inlet or the sharp aluminum fins of the outdoor unit You may get injured Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm after i...

Page 4: ...r the installation of multi air conditioner systems is on the increase because of the need for effective use of floor space individual control energy conservation by curtailing heat and carrying power etc Most importantly the multi air conditioner system is able to replenish a large amount of refrigerant compared to conventional individual air conditioners If a single unit of the multi air conditi...

Page 5: ... 2 3 4 3 5 3 51 1 Contents of Remote Controller Switch Alarm Display 2 Outdoor Unit Control PCB LED Display 3 Mini VRF System Alarm Codes 4 Inspection of Parts Outdoor Unit 3 52 5 Symptom Thermostat in OFF continues or cycles OFF ON too frequently 3 Trouble Diagnosis 4 PCB Settings 1 Outdoor Unit Control PCB 5 Self Diagnostics Function Table 1 Self Diagnostics Function Table 6 Service Checker 1 Ou...

Page 6: ...v SM830209 00 Mini VRF SYS indb 5 SM830209 00 Mini VRF SYS indb 5 2012 01 11 18 24 07 2012 01 11 18 24 07 ...

Page 7: ... Automatic Address Setting from the Remote Controller 1 10 3 3 Display during automatic address setting 1 10 3 4 Request concerning recording the indoor outdoor unit combination Nos 1 11 3 5 Checking the indoor unit addresses 1 11 1 Address Settings Outdoor Units SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 24 07 2012 01 11 18 24 07 ...

Page 8: ...F Refer to Table of Self Diagnostic Functions and Description of Alarm Displays YES NO Turn OFF the indoor and outdoor unit power Make necessary corrections Check the alarm contents Make necessary corrections Turn OFF the indoor and outdoor unit Check the alarm contents Is it OK to start the compressors Turn ON the indoor and outdoor unit power Short circuit the cooling side of the mode change 3P ...

Page 9: ...emp CN TD RC plug CN RC Liquid temp CN C1 Suction temp CN TS High pressure switch plug CN 63PH OC plug CN OC MOV plug CN MOV1 EEPROM memory IC IC18 CHK S003 JP001 CN PRY2 CN PRY1 S002 S004 TEST AP RUN STOP CHK CN OPT1 CN OPT2 EMG plug CN EMG SILENT CN SILENT LED for EEPROM memory IC D330 POWER LED D514 High pressure sensor CN HPS Outdoor air temp CN TO Comp discharge temp CN TD RC plug CN RC Liqui...

Page 10: ... 2P Short circuit these pins and apply a pulse signal to start all indoor units in that system STOP 2P Short circuit these pins and apply a pulse signal to stop all indoor units in that system If the pins are left short circuited it will not be possible to start operation from the indoor unit remote controllers AP 2P Socket for silent mode 2P plug White CN SILENT These pins are used when applying ...

Page 11: ... PCB short circuit the automatic address pin CN A ADD for 1 second or longer then release it Communication for automatic address setting begins To cancel again short circuit the automatic address pin CN A ADD for 1 second or longer then pull it out The LED that indicates that automatic address setting is in progress turns OFF and the process is stopped Automatic address setting is completed when L...

Page 12: ...dress setting in Heating mode Case 3A Automatic address setting in Cooling mode Case 3B System address system 1 setting No of indoor units 6 units setting Outdoor unit system 1 Unit No 1 Leave the socket that is used to short circuit the terminal plug CN TERMINAL Inter unit control wiring Indoor unit Remote controller Remote controller communication wiring No 2 unit settings System address system ...

Page 13: ... pin CN A ADD for 1 second or longer then pull it out Communication for automatic address setting begins To cancel again short circuit the automatic address pin CN A ADD for 1 second or longer then pull it out The LED that indicates automatic address setting is in progress turns OFF and the process is stopped Automatic address setting is completed when LEDs 1 and 2 on the outdoor unit control PCB ...

Page 14: ...one system at the same time Communication for automatic address setting begins the compressors turn ON and automatic address setting in heating mode begins All indoor units operate To cancel again short circuit the automatic address pin CN A ADD for 1 second or longer then pull it out The LED that indicates automatic address setting is in progress turns OFF and the process is stopped Automatic add...

Page 15: ...nger then pull it out Be sure to perform this process for one system at a time Automatic address settings cannot be performed for more than one system at the same time Communication for automatic address setting begins the compressors turn ON and automatic address setting in Cooling mode begins All indoor units operate To cancel again short circuit the automatic address pin CN A ADD for 1 second o...

Page 16: ...e After the power is turned ON and automatic address setting is not in progress 1 or more indoor units are confirmed in that system however the number of indoor units does not match the number that was set Automatic address setting is in progress Alternating Automatic address setting completed At time of automatic address setting the number of indoor units did not match the number that was set whe...

Page 17: ...splayed for the indoor unit that is connected to the remote controller Only the address of the indoor unit that is connected to the remote controller can be checked Press the button again to return to normal remote controller mode If multiple indoor units are connected to 1 remote controller group control 1 button and button for 4 seconds or longer simple settings mode 2 3 button 4 5 button again ...

Page 18: ... MEMO 1 12 SM830209 00 Mini VRF SYS indb 12 SM830209 00 Mini VRF SYS indb 12 2012 01 11 18 24 15 2012 01 11 18 24 15 ...

Page 19: ...troller Functions 1 Remote Controller Test Run Settings 2 2 2 Simple Settings Function 2 3 3 Detailed Settings Function 2 8 4 Remote Controller Servicing Functions 2 18 SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 24 15 2012 01 11 18 24 15 ...

Page 20: ... will not operate for approximately 3 minutes after the power is turned ON and after operation is stopped If correct operation is not possible a error code is displayed on the remote controller LCD display Refer to Table of Self Diagnostic Functions and correct the problem After the test run is completed press the button again Check that TEST disappears from the LCD display To prevent continuous t...

Page 21: ...LCD display Fig 2 1 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating If unit No is displayed the same setting will be made for all indoor units Press the temperature setting buttons to ...

Page 22: ... 0002 LL LL 0004 Lo 1 min LL 3 min Lo 0005 Lo Lo 0006 LL Lo Heating intake temperature shift 0000 No shift 0001 Shifts intake temperature 1 C down 0002 Shifts intake temperature 2 C down 0003 Shifts intake temperature 3 C down 0004 Shifts intake temperature 4 C down 0005 Shifts intake temperature 5 C down 0006 Shifts intake temperature 6 C down Electric heater installation 0000 No heater 0001 Heat...

Page 23: ...00 1250 0002 2 Way cassette L1 2500 1250 10000 5000 2500 1250 2500 1250 0003 1 Way cassette D1 2500 1250 0005 Low Silhouette Ducted F1 Slim Low Static Ducted M1 1250 5000 2500 2500 1250 5000 2500 0006 High Static Pressure Ducted E1 1250 2500 1250 5000 2500 0007 Ceiling T1 2500 1250 2500 1250 0008 Wall Mounted K1 150 75 0010 Floor Standing P1 150 75 0011 Concealed Floor Standing R1 150 75 Unit hour...

Page 24: ...re multiple remote controllers in the same refrigerant system it is possible to set one remote controller as the priority remote controller the remote controller which is given priority for selecting the operating mode If 2 or more remote controllers are set as priority remote controllers an alarm will occur at the remote controllers and operation will not be possible When the priority remote cont...

Page 25: ...perature shift Shifts the intake temperature during heating Can be set when the body thermostat is used 07 Electric heater installation Set when cost distribution is performed using an AMY central control system or similar system and when an optional electric heater is installed This is unrelated to control of the electric heater 08 Humidifying when heater thermostat is OFF Normally humidifying do...

Page 26: ... and settings data are displayed blinking on the remote controller LCD display Fig 2 2 At this time the indoor unit fan or all indoor unit fans in the case of group control begins operating If group control is in effect press the button and select the address unit No of the indoor unit to set At this time the fan at the indoor unit begins operating Press the temperature setting buttons to select t...

Page 27: ... to position 2 and stay Move to position 3 and stay Move to position 4 and stay Move to position 5 and stay 2 3 4 5 Fig 2 3 NOTE Setting the Flap Separately When setting the CZ RTC2 1 The 4 air outlet flap can be adjusted separately during operation When not adjusted separately all flaps operate in the same manner Procedure Stop the system before performing these steps 4 1 Press and hold the simul...

Page 28: ...it No 1 0002 Unit No 2 0003 Unit No 3 0064 Unit No 64 0099 Not set Group control address 0000 Individual 1 1 Indoor unit with no group wiring 0001 Main unit One of the group control indoor units 0002 Sub unit All group control indoor units except for main unit 0099 Not set Cooling intake temperature shift 010 Shifts intake temperature by 10 C 009 Shifts intake temperature by 9 C 001 Shifts intake ...

Page 29: ...nt Upper limit Drying 0018 18 C Lower limit at shipment 0019 19 C Lower limit Upper limit Auto heat cool 0017 17 C Lower limit at shipment 0018 18 C Lower limit 0026 26 C 0027 27 C Upper limit at shipment 0000 Normal 0001 Ignore heat exchanger temperature conditions 0000 Incapable of auto restart setting 0001 Capable of auto restart setting at factory shipment 0000 Filter input differential pressu...

Page 30: ...ature 25 C 0026 Control temperature 26 C Fan output switching 0000 Output linked with fan ON when indoor unit fan is operating 0001 Fan mode operation output Drain pump delayed start time 0000 No delayed start 0001 1 sec delayed start 0002 2 sec delayed start 0058 58 sec delayed start 0059 59 sec delayed start 0060 60 sec delayed start Humidifier setting 0000 Humidifier output OFF Drain pump stopp...

Page 31: ...ly ON Repeat timer switching 0000 Function disabled 0001 Function enabled Timer function change prohibit 0000 Function disabled 0001 Function enabled Smudging control 0000 No smudging control Setting the Flap Separately Only for 4 way Cassette type 0000 0001 0002 0003 0004 0005 0006 Setting the Flap Separately Only for 4 way Cassette type Setting the Flap Separately Only for 4 way Cassette type Se...

Page 32: ...fficult to turn the thermostat ON 18 Automatic stop time after operation start The time at which an indoor unit is automatically stopped after operation starts can be set in increments of 5 minutes 1E Temperature shift for cooling heating change in auto heat cool mode Auto heat cool selects the operating mode automatically based on the difference between the room temperature and the temperature se...

Page 33: ... However this setting is used when the T10 terminal is used for OFF reminder or for fire prevention input 31 Ventilation fan operation from remote controller It is possible to install a total heat exchanger and ventilation fan in the system which can be started and stopped by the wired remote controller The ventilation fan can operate linked with the start and stop of the indoor unit or can be ope...

Page 34: ...46 DC flap swing mode Selects the swing operation mode for the flap 5d DC fan tap setting Sets the DC fan tap according to the purpose of use Change the settings data at the same time 5E Humidifier ON time Sets the humidifier output ON time for when the humidifier is operating ON OFF control is performed during humidifier operation This setting therefore sets the ON time per 60 second interval 5F ...

Page 35: ...or unit con trol PCB If the setting No is 3 then connect the jumper connector to the connector pin TP3 2P yellow on the indoor unit control PCB 1 Way Cassette type Procedure Be sure to turn OFF the main power source before performing the steps below Open the electrical component box cover then check the indoor unit control PCB Fig 2 5 Connect the jumper connector 2P yellow which was supplied with ...

Page 36: ...Simple settings Filter life time operating mode priority central control address and other settings Press and hold the and buttons for 4 seconds or longer When settings are made from a remote controller the indoor unit where that remote controller is connected stops Detailed settings System address indoor unit address central control address and other settings Press and hold the and buttons for 4 ...

Page 37: ...ostat forced ON Procedure Press and hold the button for 4 seconds or longer Test appears on the remote controller LCD display Fig 2 6 Start operation Press the button to return to normal remote controller display Fig 2 6 2 3 1 4 CZ RTC2 SM830209 00 Mini VRF SYS indb 19 SM830209 00 Mini VRF SYS indb 19 2012 01 11 18 24 27 2012 01 11 18 24 27 ...

Page 38: ...g and buttons to change the item code to the sensor address of the sensor you wish to monitor For the relationship between the sensor address and sensor type refer to the sensor temperature relationship table on next page If group control is in effect press the button to change to the unit you wish to monitor Press the CHECK button to return to normal remote controller operation Note The temperatu...

Page 39: ...heat exchanger temp E3 Discharge air temp Discharge air temp setting Indoor unit MOV position Outdoor unit High pressure sensor temp Suction temp TS Outside air temperature Inverter primary current Sensor Temperature Relationship Table Room temp 1 Remote controller temp Discharge temp TD 1 Main unit only in case of group control Sensor address MOV1 position Actual operating Frequency SM830209 00 M...

Page 40: ... MEMO 2 22 SM830209 00 Mini VRF SYS indb 22 SM830209 00 Mini VRF SYS indb 22 2012 01 11 18 24 28 2012 01 11 18 24 28 ...

Page 41: ...arm Display 3 2 2 Outdoor Unit Control PCB LED Display 3 4 3 Mini VRF System Alarm Codes 3 5 4 Inspection of Parts Outdoor Unit 3 51 5 Symptom Thermostat in OFF continues or cycles OFF ON too frequently 3 52 SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 24 28 2012 01 11 18 24 28 ...

Page 42: ... unit PCB Error of sub outdoor unit in receiving serial communication signal from main outdoor unit Outdoor unit serial communications failure Error of main indoor unit in receiving serial communication signal from sub indoor units Duplication of main indoor unit address setting in group control Duplication of outdoor R C address setting Group control wiring is connected to individual control indo...

Page 43: ...ompressor starts up etc IPM trip IPM current or temperature Indoor coil temp sensor E1 Indoor coil temp sensor E3 Indoor suction air room temp sensor TA Indoor discharge air temp sensor BL Comp discharge gas temp sensor TD Outdoor coil liquid temp sensor C1 Outdoor air temp sensor TO Compressor intake port temperature sensor TS High pressure sensor EEPROM on the outdoor unit PCB has failed Power s...

Page 44: ...atch the number that was set Automatic address setting was completed successfully After the power is turned ON the number of detected indoor units connected to that system matches the number that was set and regular communications are occurring Automatic address setting is in progress At time of automatic address setting the number of indoor units did not match the number that was set Alarm displa...

Page 45: ...y units F04 F07 Heat Exchanger Inlet Temperature Sensor C1 Error Compressor Discharge Temperature Sensor Error F08 F12 F16 F31 Outdoor Unit Nonvolatile Memory EEPROM Error High Pressure Sensor Error Compressor Intake Temperature Sensor TS Error Outdoor Air Temperature Sensor TO Error H01 H02 H03 H31 HIC Error Compressor CT Sensor Current Sensor Unplugged L04 L10 Outdoor Unit Capacity Not Yet Setup...

Page 46: ...number of indoor units on the outdoor control PC board Is the setting the same as the number of indoor units that are actually connected 3 1 3 3 3 6 Is the indoor outdoor control line connected to more than one outdoor unit Network wired 3 2 3 4 Correct the setting Is the Terminal resistor select switch on the outdoor control PC board set to just one unit 3 3 3 5 2 1 Power on 2 3 3 1 3 2 Correct t...

Page 47: ...rrect this or after replacing the nonvolatile memory write model data to it in the remote control detailed settings mode 3 6 Is there a short miswiring disconnection wrong contact or grounding in the remote control s wiring 3 7 Is the LED blinking on the indoor unit s control PC board 3 5 Are there any indoor units with their power off in the remote control group s wiring 2 2 Are the CHK pin and o...

Page 48: ... System Alarm Codes LED OPTION CHK Pin DC Motor Model Indoor Unit Control Board TEST Pin LED CHK Pin AC Motor Model Indoor Unit Control Board OPTION SM830209 00 Mini VRF SYS indb 8 SM830209 00 Mini VRF SYS indb 8 2012 01 11 18 24 31 2012 01 11 18 24 31 ...

Page 49: ...ol PC board connected to on the indoor unit s control PC board Is the indoor unit under group control 1 1 Are the wires 1 white 2 black to the remote control group shorted or opened 1 2 2 1 Disconnect the connector mentioned above on the board of the indoor unit control PC board and see whether the E02 goes off after several minutes When doing so if two remote controllers are being used and the wi...

Page 50: ...ntroller 3 Indoor unit control PC board 1 Central control unit E03 Error in Indoor Unit Receiving Signal from Remote Controller central Error Detection Method When indoor unit s are connected Error Diagnosis It is judged an error when there is no communication from any remote controller collectively in a 3 minute period or if there is no communication from the central device in a 15 minute period ...

Page 51: ...3 Mini VRF System Alarm Codes AC Motor Model Indoor unit Control PC Board DC Motor Model Indoor unit Control PC Board OPTION RC OPTION RC SM830209 00 Mini VRF SYS indb 11 SM830209 00 Mini VRF SYS indb 11 2012 01 11 18 24 33 2012 01 11 18 24 33 ...

Page 52: ...Yes No Remove the short 4 2 Yes No 4 3 4 5 Yes No No No 4 1 Check the indoor unit addresses from the remote control s detailed settings mode Is it Not Set 99 or is the indoor unit s address duplicated 3 3 When the network of indoor outdoor operation line was wired was the SHORT setting of the terminal resistor switch on the outdoor control PC board set on multiple units four or more 2 2 Indoor out...

Page 53: ...ocedures for replacing the nonvolatile memory EEPROM of the indoor unit and or replacing the indoor unit s control board refer to the manual that is packaged with the indoor unit service board DC Motor Model Indoor unit Control Board AC Motor Model Indoor unit control Board LED LED CHK Pin TEST Pin OPTION OPTION RC RC CHK Pin for single phase outdoor unit PCB for 3 phase outdoor unit PCB TERMINAL ...

Page 54: ...Is the terminal resistor select switch on the outdoor main PC board set to OPEN Is the indoor outdoor operation line opened or shorted 1 3 1 4 Replace the indoor unit control PC board 1 5 Is the indoor outdoor operation line connected to more than one outdoor unit Network wired 1 1 Is the SHORT on the terminal resistor select switch on the outdoor main PC board set to one unit and the others are O...

Page 55: ...Power on 2 1 Correct the wiring 3 1 3 3 3 5 Yes Yes Yes No No No Disconnect the connector mentioned above on the control PC board of the indoor unit control PC board and see whether the E06 goes off after several minutes When doing so if two remote controllers are being used and the wireless remote controller is the main remote controller set the other remote controller as the main 3 3 Replace all...

Page 56: ...d 1 2 Is the terminal resistor select switch on the outdoor main PC board set to OPEN Is the indoor outdoor operation line opened or shorted 1 3 1 4 Replace the outdoor unit main PC board 1 5 Is the indoor outdoor operation line connected to more than one outdoor unit Network wired 1 1 Is the SHORT on the terminal resistor switch on the outdoor main PC board set to one unit and the others are OPEN...

Page 57: ...le unit DISP pin is shorted across the indoor unit whose address is Not Set Remove the short 1 2 Is the DISP pin on the indoor unit control PC board shorted 1 1 Conduct checks prior to auto address setting Does E08 fail to go off even after running auto address setting again 1 2 1 3 1 4 Yes Yes No No 1 3 Do not make changes to indoor unit addresses with the detailed settings of the remote controll...

Page 58: ... 1 1 1 Remote controller Press and hold both buttons for 4 seconds or longer Press button Once the display changes from flashing to steady the setting is complete Once you press button the remote controller returns to its normal display This will display the item 01 and the setting data 0001 or the like on the remote controller s display Press Timer 1 4 5 2 3 buttons to switch the setting data to ...

Page 59: ... controller during the auto address setting process When one controller in a networked system is running auto address setting it is not possible to start auto address setting from another controller Wait until the auto address setting in progress finishes 1 1 Auto Address E13 Error in Indoor Unit Transmitting Signal to Remote Controller Error Detection Method Error Diagnosis It is judged an error ...

Page 60: ...ontroller set the other remote controller as the main Replace all optional control PC board or wireless remote control parts including wiring 4 3 4 4 Is the LED blinking on the indoor unit s control PC board 4 5 Set the number of the indoor unit setting at No 10 on the outdoor unit s control PC board And compare the status of the indoor unit s connection setting at No 9 indoor unit check Then make...

Page 61: ...to communications and this is determined from the number of indoor units specified with the outdoor unit This is detected even when auto address setting is not used 1 2 1 The actual number of indoor units is more than that specified at the outdoor unit Conduct checks prior to auto address setting 1 1 Auto Address SM830209 00 Mini VRF SYS indb 21 SM830209 00 Mini VRF SYS indb 21 2012 01 11 18 25 08...

Page 62: ...ote control group wiring is opened More than one indoor unit in the control group is set to Main An indoor unit in the control group is set to Separate The DISP pin of an indoor unit sub remote controller in the control group is shorted 1 2 Replace all optional control PC board and or wireless remote control parts including wiring Replace the indoor unit control PC board 3 3 Is the wireless remote...

Page 63: ...ned on The address es of indoor unit s are not assigned correctly The indoor outdoor control line may be disconnected somewhere between the indoor unit s and the outdoor unit Check and make sure the indoor outdoor control line is connected Are the address es of indoor unit s assigned correctly 1 1 Are the indoor units turned on 1 2 1 3 1 2 Set its address 1 3 Power on Yes No 1 Indoor Unit Yes No S...

Page 64: ... Outdoor Unit Serial Transmission Error Error Detection Method Error Diagnosis Outdoor unit unable to read and confirm its own transmission data with the board of the outdoor unit The power to the control PC board of the outdoor unit is not turned on The circuit on the control PC board of the outdoor unit faulty Transmission from an outdoor unit faulty 1 2 SM830209 00 Mini VRF SYS indb 24 SM830209...

Page 65: ...y installed at holder side 1 2 1 2 Reconnect and check Replace sensor Correct and see what happens 1 3 Yes No 1 Sensor 2 PC board 3 Operating status Yes No Resistance between connector pins on PC board is less than 1 k ohm 2 1 Replace PC board 2 2 Yes No Peripheral temperature of outdoor unit is over 46 C 3 1 Check noise 3 3 Correct 3 2 Yes No Tends to have insufficient refrigerant charge in the s...

Page 66: ...n open circuit or short circuit 1 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No SM830209 00 Mini VRF SYS indb 26 SM830209 00 Mini VRF SYS indb 26 2012 01 11 18 25 11 2012 01 11 18 25 11 ...

Page 67: ...hort circuit Error Diagnosis 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No SM830209 00 Mini VRF SYS indb 27 SM830209 00 Mini VRF SYS indb 27 2012 01 11 18 25 11 2012 01 11 18 25 11 ...

Page 68: ...cuit or short circuit 1 2 Sensor connector is connected to PC board properly 1 1 1 2 Reconnect and check Yes No 1 Sensor 2 Outdoor control PC board Replace PC board because of outdoor control PC board failure 2 1 Resistance between sockets is infinity or 0 ohm 1 2 Replace sensor 2 1 Yes No SM830209 00 Mini VRF SYS indb 28 SM830209 00 Mini VRF SYS indb 28 2012 01 11 18 25 11 2012 01 11 18 25 11 ...

Page 69: ...he measuring gauge to the high pressure outlet port and measure it The detect pressure value is the pressure value indicated by the monitoring software display 2 3 3 1 Is sensor resistance value in normal Disconnect the connector and measure the resistance value between each wire of sensor Correct reference values between 1 2 8 5 ｋ ohm 1 3 1 0 ｋ ohm 2 3 8 5ｋ ohm 1 2 2 1 Replace sensor Yes No It is...

Page 70: ...time nonvolatile memory EEPROM is not installed Read values after writing onto nonvolatile memory EEPROM is inconsisntent 1 2 Does EEPROM exist on the control PC board 1 1 1 2 Install EEPROM Yes No 1 PC board Incorrect EEPROM Replace with correct EEPROM 1 3 Is EEPROM installed properly Check Bent IC pin or incorrect installation etc 1 2 1 3 Correct Yes No SM830209 00 Mini VRF SYS indb 30 SM830209 ...

Page 71: ...rcurrent trip current value Trip current value Single phase model hp horse power 1 2 2 2 3 2 2 Loose electrical wire connection 2 1 Correct wiring 2 3 Has FUSE 1 blown Check the electrical conduction with tester 2 2 Yes Yes No No Replace CR board 2 3 PC board wiring Check not only in the outdoor unit stop mode but in the drive mode Heating Cooling 4 hp 23 0A 22 0A 5 hp 26 5A 25 0A 6 hp 30 0A 28 0A...

Page 72: ...rol PC board wiring Yes No Extreme voltage fluctuations Extreme distortion of voltage waveform Check power supply 2 1 Yes No Check power supply Loose electrical wire connection Is HIC control PC board connector CN PAM poorly connected or opened with wire Replace HIC control PC board Check not only in the outdoor unit stop mode but in the drive mode Not satisfied with 10 rated supply voltage SM8301...

Page 73: ...H03 Compressor CT Sensor Current Sensor Unplugged Error Detection Method Error Diagnosis If 18A or greater is detected when the compressor is stopped alarm triggered even if the connector is unplugged If no current is detected even though a compressor is running 1 2 It is judged an error based on the criteria listed below SM830209 00 Mini VRF SYS indb 33 SM830209 00 Mini VRF SYS indb 33 2012 01 11...

Page 74: ... in the wiring power cord signal line between the HIC and the outdoor CR board Check the wiring one by one with a tester if there is opened and grounding The heat dissipating surface on the back of the HIC is in good contact with the heat sink heat dissipating fins of the electrical box Check for looseness in the fastening screws and the condition of the heat conducting putty 1 2 Tighten screw s a...

Page 75: ...phase outdoor unit HIC board 3 phase outdoor unit HIC board NU W V U P CN VDC CN VDC 4WAY Valve CN 20S Crankcase heater CN CH 4WAY Valve CN 20S Crankcase heater CN CH PIN1 VDC PIN2 VDC SM830209 00 Mini VRF SYS indb 35 SM830209 00 Mini VRF SYS indb 35 2012 01 11 18 25 23 2012 01 11 18 25 23 ...

Page 76: ...eceived over 5 times within 3 minutes 1 2 Are other outdoor units using a duplicate setting 1 1 2 1 2 2 Yes No 2 When units are networked first set the system address for each outdoor unit in the order 1 2 3 and then run auto address setting 2 1 Run the auto address setting 2 2 Installation or setting related 1 System address SM830196 00 indb 36 2011 09 30 15 50 30 SM830209 00 Mini VRF SYS indb 36...

Page 77: ...outdoor unit capacity not yet setup or systematically unauthorized setting Check Connect the outdoor maintenance remote controller and check whether item code 81 outdoor capacity value shows 0 or unauthorized capacity is set on the detailed setting mode display of the outdoor EEPROM If the capacity value of the item code 81 with the outdoor maintenance remote controller is incorrect recorrect and ...

Page 78: ...g become opened 1 2 Is the wire from the coil for controlling the 4 way valve firmly connected to the 4 way valve 1 3 4 way valve 1 PC board wiring Correct wiring 1 3 Yes No 2 1 Correct connector Yes No During heating mode Comp ON insert and remove the connector wired from the 4 WAY valve into or from CN 20S connector on the HIC PC board At the same time does the ON OFF sounds occur from the 4 way...

Page 79: ...sufficient refrigerant charge in the system Service valve inside the outdoor unit closed Additional refrigerant charge 2 2 Yes No Open service valve Replace CR board Yes No Replace the strainer Are the tubes clogged Is the outdoor unit s electronic control valve operating correctly Check for debris clogging the electronic control valve a problem with the electronical coil and or the control PC boa...

Page 80: ...ing is opened Are these checking finished without fail 3 4 4 1 Replace the outdoor unit fan Correct connection and or wiring Yes No While heating is operating an alarm is occurred 3 5 3 6 4 1 Yes No 2 Service valve 3 Problem around the heat exchanger P04 Actuation of High Pressure Switch Error Detection Method Error Diagnosis It is judged an error if the internal circuit of the high pressure switc...

Page 81: ...problem with the electronical coil and or the control PC board 4 2 4 3 Repair the expansion valve of the indoor unit Yes No 3 Problem around the heat exchanger 4 Blockage in the refrigerant circuit Error occurs when the system is operating in cooling mode 5 1 5 3 5 2 Yes No An alarm is occurred with the high pressure at 3 80 MPa with the pressure measured either as displayed by the monitoring soft...

Page 82: ...tdoor unit HIC PC board 3 1 Yes No 2 Check the outdoor unit CR board There may be a Instantaneous blackout failure If there is nothing abnormal see what happens RE1 RE2 3 1 3 Final check P05 Power Supply Error Error Detection Method Error Diagnosis Instantaneous blackout Note The work involved in diagnosing each of the items is extremely dangerous so turn the power off at the breaker before perfor...

Page 83: ...ng indoor unit continues for 3minutes even after 7 minute to 15 minute since the heating test run has started 1 1 2 1 Yes No 1 Service valve Open the service valve 2 1 2 Adjustment to refrigerant change 3 Blockage in refrigerant circuit 3 1 Avoid clogging 3 2 Yes No Are the tubes clogged Not additional refrigerant charged 3 1 Yes No Additional refrigerant charge 3 2 3 3 Replace the electronic cont...

Page 84: ...al O2 Alarm Occurred from the indoor unit With the indoor unit s EEPROM setting item code 0B set to 0001 the EXCT input was shorted 1 2 Is an O2 sensor being used Correct wiring 4 1 Yes No Is the indoor EXCT socket wire shorted 3 1 3 4 Indoor EXCT wiring 4 3 4 2 Yes No Is the alarm triggered if the indoor EXCT socket wire is disconnected and the power is reset Since there is no error see what happ...

Page 85: ... by wiring from the CR board 2 2 Correct 2 3 Yes No Correct 2 4 Yes No 2 3 Disconnected parts miswiring and or poor connections loose are observed in the connections of outdoor board s that are connected by wiring from the HIC board Correct 2 5 Yes No 2 4 Disconnected parts miswiring and or poor connections loose are observed in the connections of HIC boards connected by wiring from the CR board C...

Page 86: ...e saturation temperature is 43 C or less the secondary current of the inverter is high The frequency Hz ends up dropping due to the current 5 6 Replace the compressor See what happens Yes No Tends to have insufficient refrigerant charge in the system 5 5 Adjust the amount of refrigerant 5 6 Yes No 4 Check the situation 5 Check operation Dividing the outdoor EEPROM INV operation time by the number ...

Page 87: ...range Measure the board by itself Remove wires connected from other parts Measure using IPM terminals Conforming part resistance value measure with an analog tester Excepting the parts of value is 0 short circuit it is acceptable if a small resistance value appears as a reference value unless the HIC board IPM Pass Fail Tests Tester terminals Resistance value ohm U 1 k to 5 k V 1 k to 5 k W 1 k to...

Page 88: ...ignal cannot be detected normally 1 2 Are the connectors CN FMA CN FMB CN FM1 and CN FM2 firmly connected to the outdoor control PC board lock engaged 3 Turn the power on and run the unit again is P22 triggered again Or can you see or hear anything that is obviously wrong in its rotation Replace the outdoor control PC board If it fails to operate normally even after replacing the outdoor control P...

Page 89: ...or terminals 1 4 4 1 Check the outdoor control PC board Replace the control PC board and operate the unit 3 1 3 2 4 1 Yes No 3 Check the HIC PC boards Replace the HIC board 3 2 Replace the HIC PC board and operate the unit Apply putty and screws must not be loose Does it operate normally Yes No See what happens See what happens The results of the pass fail tests for the following HIC PC board IPM ...

Page 90: ...or unit HIC board 3 phase outdoor unit HIC board NU W V U P NU W V U P CN VDC CN VDC 4WAY Valve CN 20S Crankcase heater CN CH 4WAY Valve CN 20S Crankcase heater CN CH PIN1 VDC PIN2 VDC SM830209 00 Mini VRF SYS indb 50 SM830209 00 Mini VRF SYS indb 50 2012 01 11 18 25 47 2012 01 11 18 25 47 ...

Page 91: ...the test pin CN TEST black is short circuited Set DC fan motor at W5 FM1 340 360 rpm FM2 360 380 rpm 20S turns ON for 0 5 sec Check Inter unit control wiring circuit If normal state go to the next step If not it stops after LED1 starts blinking at 0 5 sec intervals and LED2 turns off Connector CH1 turns ON for 0 5 sec Do the test to read write EEPROM If normal state go to the next step If not it s...

Page 92: ... status 2 2 Yes No 2 2 Discharge temperature is over 80 C in stop mode and does not decrease Connect outdoor maintenance remote controller to RC socket on outdoor unit main control PC board and check alarm messages Replace discharge temperature sensor 2 3 Yes No 2 3 Demand value always stays low The value is lower than 70 Excluding 1 unlimited Connect outdoor maintenance remote controller to RC so...

Page 93: ...Control PCB 4 2 HIC 6LE1E8 4 5 4 6 1 3 Functions of Outdoor Unit PCB 1 1 Single Phase Unit HIC 5LE1E5 HIC 6LE1E5 4 3 CR 6LE1E8 4 4 CR 5LE1E5 CR 6LE1E5 4 2 1 2 3 Phase Unit SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 26 03 2012 01 11 18 26 03 ...

Page 94: ...ILENT CN SILENT TEST AP RUN STOP LED for EEPROM memory IC D330 POWER LED D514 High pressure sensor CN HPS Outdoor air temp CN TO Comp discharge temp CN TD RC plug CN RC Liquid temp CN C1 Suction temp CN TS High pressure switch plug CN 63PH OC plug CN OC MOV plug CN MOV1 EEPROM memory IC IC18 CHK SM830209 00 Mini VRF SYS indb 2 SM830209 00 Mini VRF SYS indb 2 2012 01 11 18 26 04 2012 01 11 18 26 04...

Page 95: ... 1 Outdoor Unit Control PCB HIC PCB HIC 5LE1E5 HIC 6LE1E5 CN VDC P U V W NU CN VDC 4WAY Valve CN 20S Crankcase heater CN CH 4 3 SM830209 00 Mini VRF SYS indb 3 SM830209 00 Mini VRF SYS indb 3 2012 01 11 18 26 06 2012 01 11 18 26 06 ...

Page 96: ...PT2 EMG plug CN EMG SILENT CN SILENT LED for EEPROM memory IC D330 POWER LED D514 High pressure sensor CN HPS Outdoor air temp CN TO Comp discharge temp CN TD RC plug CN RC Liquid temp CN C1 Suction temp CN TS High pressure switch plug CN 63PH OC plug CN OC MOV plug CN MOV1 EEPROM memory IC IC18 SM830209 00 Mini VRF SYS indb 4 SM830209 00 Mini VRF SYS indb 4 2012 01 11 18 26 14 2012 01 11 18 26 14...

Page 97: ...gs 4 1 Outdoor Unit Control PCB 4 5 HIC PCB HIC 6LE1E8 U P PIN1 VDC PIN2 VDC V W NU 4WAY Valve CN 20S Crankcase heater CN CH SM830209 00 Mini VRF SYS indb 5 SM830209 00 Mini VRF SYS indb 5 2012 01 11 18 26 25 2012 01 11 18 26 25 ...

Page 98: ... can be set up to 39 however control will be for 30 systems even if the setting is set to higher than 30 An alarm will be displayed if system addresses are duplicated For details refer to Table 4 1 S003 DIP switch 2P Switches for setting system address 10s digit and 20s digit If 10 systems or more are set the setting is made by a combination of this DIP switch and S002 If 10 19 systems are set set...

Page 99: ...ug Vacuuming pin To perform vacuuming of the outdoor unit short circuit this pin and then turn the power ON All solenoid valves turn ON and vacuuming begins smoothly Do not perform automatic address setting at this time Release the short circuit to return the unit to normal status MODE 2P plug Indoor unit Heating Cooling mode change pin When operating the compressors to perform automatic address s...

Page 100: ... 6 6 OFF OFF 7 7 OFF OFF 8 8 OFF OFF 9 9 OFF OFF 10 0 ON OFF 11 1 ON OFF 12 2 ON OFF 13 3 ON OFF 14 4 ON OFF 15 5 ON OFF 16 6 ON OFF 17 7 ON OFF 18 8 ON OFF 19 9 ON OFF 20 0 OFF ON 21 1 OFF ON 22 2 OFF ON 23 3 OFF ON 24 4 OFF ON 25 5 OFF ON 26 6 OFF ON 27 7 OFF ON 28 8 OFF ON 29 9 OFF ON 30 0 ON ON Table 4 2 Setting the Number of Indoor Units S004 Rotary switch gray Number of Indoor Units S004 Set...

Page 101: ...lf Diagnostics Function Table 5 Contents 5 1 5 Self Diagnostics Function Table 1 Self Diagnostics Function Table 5 2 SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 26 38 2012 01 11 18 26 38 ...

Page 102: ...ime from several seconds to several minutes after automatic address setting is started Check the Alarm Displays table and correct the problem LED 1 and 2 on the outdoor unit control PCB indicate that automatic address setting is in progress the LEDs blink alternately for several minutes after automatic address setting is started the compressors may also start and stop several times however LED 1 a...

Page 103: ...r SETTING appears on the remote controller at units where the inter unit control wiring and remote controller wiring are connected correctly LED 1 and 2 on the outdoor unit control PCB blink alternately In the case of indoor unit group control if there is a mistake in the remote controller communication wiring addresses may not be set even if SETTING appears Even if alarm E15 or E16 appears addres...

Page 104: ... E30 Outdoor Unit Serial Transmission Error No Indoor Units Error Faulty Communication in Group Control Wiring Auto Address Alarm too many units F04 F07 Heat Exchanger Inlet Temperature Sensor C1 Error Compressor Discharge Temperature Sensor Error F08 F12 F16 F31 Outdoor Unit Nonvolatile Memory EEPROM Error High Pressure Sensor Error Compressor Intake Temperature Sensor TS Error Outdoor Air Temper...

Page 105: ... 6 2 1 1 Overview 6 2 1 2 Functions 6 3 1 3 Ordinary Display Controls and Functions 6 4 1 4 Monitoring Operations 6 9 1 5 Outdoor Unit Alarm History Monitor 6 11 1 6 Setting the outdoor unit EEPROM data 6 12 SM830209 00 Mini VRF SYS indb 1 SM830209 00 Mini VRF SYS indb 1 2012 01 11 18 26 40 2012 01 11 18 26 40 ...

Page 106: ...es and check the indoor unit connection status number of units operating mode etc System Diagram The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller to the outdoor unit PCB Ordinary remote controllers or other controllers are still required for the indoor units even when the outdoor unit maintenance remote controller is connected Servic...

Page 107: ... when alarm occurs Indoor thermostat ON Display of individual outdoor unit alarms Total operating time of outdoor unit compressors Oil level of the outdoor unit oil sensor Total outdoor unit power ON time Outdoor unit microcomputer version other information Temperature monitor Displays the temperature from each indoor outdoor sensor Outdoor unit alarm history monitor Displays the outdoor unit alar...

Page 108: ... as is In the case of an independent outdoor unit 1 maintenance remote controller connected to 1 outdoor unit automatic address setting for indoor units not completed both setting mode 1 and setting mode 2 can be used for outdoor unit EEPROM data settings The overall system status for that refrigerant system is displayed Special service checker wiring PCB connector 3P blue RC 3P blue Outdoor unit ...

Page 109: ... change between heating and cooling operation The display indicates the operating mode of the indoor unit with the lowest unit No All units test run Fig 6 2 Operation The CHECK button can be used to start and stop a test run for all units To start press and hold the button for 4 seconds During the test run TEST is displayed The status of test runs performed from the indoor unit remote controller i...

Page 110: ...ON status of indoor unit 7 segment display Operating status of outdoor unit compressor 7 segment display Compressor 1 operating time 0 99999999 hrs Outdoor unit power ON time 0 99999999 hrs Compressor 1 operation count 0 65535 times Alarm history 1 most recent Alarm history 2 Alarm history 3 Alarm history 4 Alarm history 5 Alarm history 6 Alarm history 7 Alarm history 8 oldest Firmware version Dis...

Page 111: ...unit system address on main bus line 1 30 YY Outdoor unit sub bus address 1 1 appears when there is only outdoor unit Sample displays Fig 6 4 Fig 6 5 LED 1 2 3 LED 1 2 3 Fig 6 3 No of connected indoor units 4 units connected Fig 6 4 Indoor Unit Nos 1 2 3 4 connected Fig 6 5 SM830209 00 Mini VRF SYS indb 7 SM830209 00 Mini VRF SYS indb 7 2012 01 11 18 26 44 2012 01 11 18 26 44 ...

Page 112: ...igure B The display of the first 4 digits and last 4 digits changes automatically every 10 seconds It can also be changed by pressing the FLAP button NOTE The remote controller check function does not function with the outdoor unit maintenance remote controller when it is connected to the outdoor unit 1 2 4 5 3 6 7 9 10 8 11 12 14 15 16 17 19 20 18 21 22 24 25 26 27 29 28 33 40 13 23 30 34 35 32 3...

Page 113: ...display and operations are the same as for monitor mode using the indoor unit remote controller Press the UNIT button and select the indoor unit to monitor Press the temperature setting buttons and select the item code of the temperature to monitor The unit No of the selected indoor unit and the temperature data are displayed To end monitoring press the CHECK button The display returns to normal d...

Page 114: ... unit heat exchanger temp E3 Indoor unit C C Discharge air temp Discharge air temp setting Indoor unit MOV position STEP C C C C Discharge temp TD High pressure sensor temp Suction temp TS Heat exchanger liquid temp C1 C Outdoor air temp TO Outdoor unit Not used Inverter primary current A MOV position Actual operating frequency Hz SM830209 00 Mini VRF SYS indb 10 SM830209 00 Mini VRF SYS indb 10 2...

Page 115: ...it Press the button and select the outdoor unit for alarm history monitoring Press the temperature setting buttons and select the item code for the alarm history The select outdoor unit address the item code and the alarm history alarm data are displayed The outdoor unit address is displayed as R C XX YY System XX Outdoor unit system address R C XX Outdoor unit system address YY Outdoor unit sub b...

Page 116: ...ay returns to normal display mode 1 6 Setting the outdoor unit EEPROM data 5 5 1 3 1 3 2 2 A and B are displayed alternately Example shows display of 0000 0001 A Display of first 4 digits B Display of last 4 digits Description Parameter DN Outdoor unit fan Quiet mode 0 Disabled 1 Quiet mode Energy saving mode 0 None 1 Discharge temp control only Mode 3 2 Demand only Mode 2 3 Discharge temp control...

Page 117: ... XX System address YY Address at outdoor unit sub bus item code number DN value in the table below and the setting data 8 digits The setting data is displayed in 8 digits The display changes between the first 4 digits Fig A and the last 4 digits Fig B When the first 4 digits are displayed the bottom dot of the colon is lit To exit setting mode press the CHECK button The display returns to the norm...

Page 118: ... MEMO 6 14 SM830209 00 Mini VRF SYS indb 14 SM830209 00 Mini VRF SYS indb 14 2012 01 11 18 26 50 2012 01 11 18 26 50 ...

Page 119: ...201201 SM830209 00 Mini VRF SYS indb II SM830209 00 Mini VRF SYS indb II 2012 01 11 18 26 50 2012 01 11 18 26 50 ...

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