Mitsubishi Electric CITY MULTI CMB-P1016V-F Service Handbook Download Page 65 | Manualshive

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background image

(3)

Indoor unit

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

YES

NO

Normal operations

Trouble observed

Stop

Start

Breaker

turned on

Operation SW

turned on

1. Protection function

self-holding cancelled.

2. Indoor unit LEV fully

closed.

Remove controller
display extinguished

3-minute drain

pump ON

FAN stop

Drain pump

ON

Error mode

Error stop

Error code blinks on
the remote controller

Indoor unit LEV
fully closed

Error code
blinks on the
outdoor
controller board

Operation mode

Heating

mode

Cooling

display

Cooling mode

Dry mode

Heating

display

Fan mode

Cooling/heating
automatic display

Cooling/heating
automatic mode

Fan display

Dry display

Prohibition

Prohibition

Heating
operations

Cooling
operations

Prohibition

Prohibition

Cooling/heating
automatic
operations

Dry
operation

Fan
operations

Prohibition “Remote
controller blinking”

Note :3

Note :3

Note :3

Note :1

Note :2

Note :1

Note : 1

Indoor unit LEV fully closed : Opening 60 (41)

Note : 2

Two error codes include indoor unit troub le, (BC controller trouble) and outdoor unit side trouble. In the case of indoor unit
trouble, error stop is observed in the concerned indoor unit only, and in the cases of (BC controller and) outdoor unit side
troubles, error stop is observed in all the indoor units connected.

Note : 3

“Prohibition” status is observed (when several indoor units are connected to one connection, of BC controller and) when
connection mode is different from indoor unit operation mode. (Operation mode display on the remote controller blinks on
and off, fan stops, and indoor unit LEV is fully closed.)

only for PURY

Error command
to outdoor unit

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Summary of Contents for CITY MULTI CMB-P1016V-F

Page 1: ...M A P315YEM A PUY P200YEM A P250YEM A P315YEM A PURY P200YEM A P250YEM A CMB P104 P105 P106 P108 P1010 P1013 P1016V F PUHY 200YEM A 250YEM A 315YEM A PUY 200YEM A 250YEM A 315YEM A PUHY 250YEMK A 315YEMK A PUHY 200YEMC A 250YEMC A 315YEMC A Service Handbook ...

Page 2: ... 61 3 Operation Flow Chart 62 4 List of Major Component Functions 68 5 Resistance of Temperature Sensor 71 REFRIGERANT AMOUNT ADJUSTMENT 72 1 Refrigerant Amount and Operating Characteristics 72 3 Refrigerant Volume Adjustment Mode Operation 75 TROUBLESHOOTING 80 1 Principal Parts 80 2 BC Controller Disassembly Procedure 3 Self diagnosis and Countermeasures Depending on the Check Code Displayed 1 1...

Page 3: ...main unit Warning Use the specified cables for wiring Make the connections securely so that the outside force of the cable is not applied to the terminals Inadequate connection and fastening may generate heat and cause a fire Have all electric work done by a licensed electrician according to Electric Facility Engineering Standard and Interior Wire Regulations and the instructions given in this man...

Page 4: ... and performance may drop Do not use a refrigerant other than R407C If another refrigerant R22 etc is used the chlorine in the refrigerant may cause the refrigerator oil to de teriorate Use a vacuum pump with a reverse flow check valve The vacuum pump oil may flow back into the refriger ant cycle and cause the refrigerator oil to deteriorate Do not use the following tools that have been used with ...

Page 5: ...ds of the pipes should be sealed until immediately before brazing Wrap elbows and T s in plastic bags for storage The new refrigerator oil is 10 times more hygroscopic than the conventional refrigerator oil such as Suniso Water infiltration in the refrigerant circuit may deteriorate the oil or cause a compressor failure Piping materials must be stored with more care than with the conventional refr...

Page 6: ...s Use only the necessary minimum quantity of oil Reason 1 The refrigerator oil used for the equipment is highly hygroscopic and may introduce water inside Notes Introducing a great quantity of mineral oil into the refrigerant circuit may also cause a compressor failure Do not use oils other than ester oil ether oil or alkylbenzene 5 ...

Page 7: ...duct Flare tool Flaring of pipes Current product Bender Bending of pipes Current product Application oil Applied to flared parts Current product Torque wrench Tightening of flare nuts Current product Pipe cutter Cutting of pipes Current product Welder and nitrogen cylinder Welding of pipes Current product Refrigerant charging meter Refrigerant charging Current product Vacuum gauge Checking the vac...

Page 8: ...no flux whenbrazingbetweencopper pipes or betweenacopper pipe and copper coupling 4 If installed refrigerant pipes are not immediately connected to the equipment then braze and seal both ends of them Reasons 1 The new refrigerant oil is 10 times more hygroscopic than the conventional oil The probability of a machine failure if water infiltrates is higher than with conventional refrigerant oil 2 A ...

Page 9: ...k into the refrigerant circuit when the vacuum pump power is turned off power failure It is also possible to attach a check valve to the actual vacuum pump afterwards 2 Standard degree of vacuum for the vacuum pump Use a pump which reaches 65Pa or below after 5 minutes of operation In addition be sure to use a vacuum pump that has been properly maintained and oiled using the specified oil If the v...

Page 10: ...est to the outside temperature is charged first while the rest of refrigerants remain in the cylinder Note In the case of a cylinder with a syphon liquid R407C is charged without turning the cylinder up side down Check the type of cylinder before charging 8 Dryer 1 Replace the dryer when the refrigerant circuit is opened Ex Change the compressor full gas leakage Be sure to replace the dryer with a...

Page 11: ... COMPONENT OF EQUIPMENT 1 Appearance of Components Outdoor unit PUHY P200 250 315YEM A Propeller fan Accumlator CSC SCC 4way valve Dryer Compressor Fan motor Heat exchanger Control box 10 ...

Page 12: ... PURY P200 250YEM A Propeller fan Accumulator CSC 4way valve Dryer Compressor Fan motor Heat exchanger Control box 11 ...

Page 13: ... PUHY 200 250 315YEM K C A Propeller fan Fan motor Heat exchanger Control box Accumulator SCC 4way valve Compressor 12 ...

Page 14: ...e filter Choke coil L2 Terminal block TB1A Power Source Terminal block TB7 Transmission Centralized control Terminal block TB3 Transmission Inteligent Power Module IPM G A board DCCT Diode stack DS Magnetic contactor 52C Capacitor C2 C3 Smoothing capacitor 13 ...

Page 15: ...Trouble CNRS3 Serial transmission to INV board CN3D SW1 CNTR CNFC1 CNVCC4 Power source for control 5V CN20 Power supply 3 L1 1 N SW3 SW4 SW2 SWU2 SWU1 CNS1 CNS2 CN40 CN41 CNVCC3 Power Source for control 1 2 30V 1 3 30V 4 6 12V 5 6 5V CN3S CN3N LD1 Service LED SWU3 CNTYP1 14 ...

Page 16: ... Frame grounding for IPM control CNCT2 ACCT CNAC2 I Power source 1 L2 3 N 5 G CN52AC Control for 52C CNRS2 CN FAN Control for MF1 Serial transmission to MAIN board SW1 CNVDC 1 4 DC 560V CNVCC4 Power supply 5V CNL2 Choke coil CNVCC2 Power supply 1 2 30V 1 3 30V 4 6 12V 5 6 5V 15 ...

Page 17: ...FANCON board CNFAN CNPOW CNFC2 CN15V1 CNDR1 CNIPM1 G A board Terminal for signal grounding CNDC1 CNDC2 16 ...

Page 18: ... 17 RELAY 10 board RELAY 4 board ...

Page 19: ... 18 BC controller SW4 SW5 SW2 SW1 CN12 Power supply 1 EARTH 3 N 5 L CN02 M NET transmission CN03 CNTR ...

Page 20: ... SV3 SV4 BV2 ST3 ST2 TH7 TH1 TH6 TH8 TH2 CP4 Drier ST10 ST9 TH5 SCC LEV1 Comp Accumulator ST7 ST6 CP1 CP3 ST8 ST5 O S Indoor units CJ1 CJ2 BV1 ST1 2 Refrigerant Circuit Diagram and Thermal Sensor 1PUHY P200 250 315YEM A 19 ...

Page 21: ...2PUY P200 250 315YEM A 63HS 63LS 63H ST4 SV1 SV3 SV4 BV2 ST3 ST2 TH7 TH1 TH6 TH8 TH2 CP4 Drier ST10 ST9 TH5 SCC LEV1 Comp Accumulator ST7 ST6 CP1 CP3 ST8 ST5 O S Indoor units CJ1 CJ2 ST1 BV1 20 ...

Page 22: ...ve Orifice Capillary Check valve Thermal sensor Strainer SP Service port ACC Accumulator CP1 SV1 ST3 TH1 TH2 TH6 TH7 CP2 ST4 Drier HEXf1 HEXf2 HEXf3 HEXb CS circuit Comp Accumulator ST7 ST6 O S CJ1 63HS 63H ST2 21S4 ST8 63LS CV2 CV3 CV7 ST1 BV1 SV3 SV4 SV5 SV6 CV5 Orifice CV6 CV8 CV9 CV10 TH5 BV2 CV4 ST9 ST10 ST11 ST5 Check Valves Block Solenoid Valves Block CJ2 21 ...

Page 23: ...4 PUHY 200 250 315YEM K C A 63HS 63LS 63H ST4 SV1 BV2 ST3 ST2 TH7 TH1 TH6 TH8 TH5 SCC LEV1 Comp Accumulator ST7 ST6 CP1 CP3 ST8 O S Indoor units CJ1 CJ2 BV1 ST1 22 ...

Page 24: ...5PUY 200 250 315YEM A 63HS 63LS 63H ST4 SV1 BV2 ST3 ST2 TH7 TH1 TH6 TH8 TH5 SCC LEV1 Comp Accumulator ST7 ST6 CP1 CP3 ST8 O S Indoor units CJ1 CJ2 ST1 BV1 23 ...

Page 25: ...cuit board MAIN board 3P CN3D 2 3 1 Fan motor Heat exchanger V W N U MF 1 3 2 CN3S 3P 5P CNFAN CN04 3P CN3N 2 3 1 SNOW DEMAND NIGHT MODE OR COMPRESSOR ON OFF OFF ON 1 2 CN3N OFF ON 1 3 ON OFF Mode Auto Normal changeover HEAT COOL DC DC Converter Symbol DCL ACCT U W 52C ZNR4 Varistor DC reactor Power factor improvement Current Sensor Magnetic contactor Inverter main circuit N a m e Fan motor Radiat...

Page 26: ... L2 L3 N ACCT W BOX BODY BOX BODY THHS Diode stack Blue Red White Black Brown Red BOX BODY INV board Power circuit board L2 MF1 2P CNFG 2P CNL2 14P CN15V2 3P CNTR 3P CNFAN 7P CNRS3 6P CNVCC2 6P CNVCC3 2P CNVCC4 7P CNRS2 X10 X01 X02 52C 3 2 1 6 5 1 2 3 4 5 6 7 1 2 1 4 3 2 2 9 3 8 7 1 6 2 1 4 3 2 2 1 1 2 1 2 3 Black Red Motor Compressor V MC1 W U White CNTR1 1A F 250VAC F3 T01 R3 R2 C3 C4 C2 DCL 52C...

Page 27: ...ine to it Solenoid valve Solenoid valve Solenoid valve Expansion valve Thermister sensor Transformer Name Symbol SV1 6A SV1 6B SV1 6C TR TH11 12 15 16 LEV1 3 PS1 3 Pressure sensor Transmission line Shield wire 220V 240V 50 60Hz Power source CONT board LEV1 16 15 14 13 12 11 10 9 8 7 6 5 1 SV1C SV1A SV1B 3 1 CNTR CN02 CN12 1 5 3 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 TR X2 X1 X30 X4 X3 X31...

Page 28: ...noid valve Solenoid valve Solenoid valve Terminal block for power source Pressure sensor Expansion valve Thermister sensor Transformer Name Symbol SV1 10A SV1 10B SV1 10C TR TH11 12 15 16 LEV1 3 PS1 3 Note TB02 is terminal block for transmission Never connect power line to it Transmission line Shield wire CONT board CN38 1 3 1 CNTR CN50 CN51 7 6 5 4 3 2 1 1 2 3 4 5 6 CN02 CN12 1 5 3 7 5 3 1 7 5 3 ...

Page 29: ... power line to it TB02 TB01 Terminal block for Transmission Solenoid valve Solenoid valve Solenoid valve Terminal block for power source Pressure sensor Expansion valve Thermister sensor Transformer Name Symbol SV1 16A SV1 16B SV1 16C TR LEV1 3 PS1 3 Shield wire Transmission line Power source 220V 240V 50 60Hz N L T1 16 Terminal 1 2 1 2 3 3 4 3 2 1 4 3 2 1 SV6C SV6A SV6B 1 2 3 4 1 2 3 4 1 2 3 4 1 ...

Page 30: ...7 20 20 5 5 44 44 20 22 13 13 20 20 14 14 0 23 0 23 10 6 9 7 14 4 13 2 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temper ature Outdoor unit LEV opening Inlet Outlet Outdoor unit Indoor unit OC Ambient temp Indoor unit Piping Disch...

Page 31: ...2 0 2 0 4 2 4 6 33 33 34 34 60 60 0 28 0 28 11 4 10 5 15 1 13 8 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temperature Outdoor unit LEV opening Discharge TH1 Heat exchanger inlet TH5 Accumulator Suction Comp CS circuit TH2 Shell b...

Page 32: ...0 0 5 8 50 39 24 12 20 60 14 34 0 23 0 28 18 7 17 2 19 8 18 2 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temperature Outdoor unit LEV opening Inlet Outlet Outdoor unit Indoor unit OC Ambient temp Indoor unit Piping Discharge TH1 H...

Page 33: ...0 54 1 9 1 9 1 98 1 98 81 80 42 44 16 16 17 17 20 20 5 5 44 44 20 20 14 14 0 23 0 23 380 415 380 415 10 6 9 7 14 4 13 2 Indoor unit fan notch Refrigerant volume Compressor volts Outdoor unit Indoor unit BC controller 1 3 High pressure Low pressure BC controller liquid Intermediate Pressure DB WB Q ty m kg V A Pulse MPa C Condition Sectional temperature LEV opening Discharge TH1 Heat exchanger outl...

Page 34: ...80 0 2 2 0 2 0 4 2 4 6 33 33 60 60 34 34 0 28 0 28 380 415 380 415 11 4 10 5 15 1 13 8 Indoor unit fan notch Refrigerant volume Compressor volts Outdoor unit total current Indoor unit BC controller 1 3 High pressure Low pressure BC controller liquid Intermediate Pressure DB WB Q ty m kg V A Pulse MPa C Condition Sectional temperature LEV opening Discharge TH1 Heat exchanger outlet TH5 Accumulator ...

Page 35: ...6 16 17 17 20 20 42 42 20 20 13 13 20 20 14 14 10 4 9 5 14 5 13 3 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temper ature Outdoor unit LEV opening Inlet Outlet Outdoor unit Indoor unit Ambient temp Indoor unit Piping Discharge TH1...

Page 36: ... 20 14 14 19 6 18 0 19 9 18 2 380 415 27 0 19 0 35 0 24 0 4 4 71 63 50 20 5 10 10 10 10 45 Hi Hi Hi Hi 11 7 360 270 420 250 150 2 02 0 54 84 42 16 17 20 42 20 13 20 14 14 1 12 9 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temper at...

Page 37: ...290 470 250 0 0 2 04 0 43 2 04 0 38 77 84 0 2 2 0 2 0 4 2 31 31 34 34 60 60 11 2 10 2 14 8 13 5 380 415 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temperature Outdoor unit LEV opening Discharge TH1 Heat exchanger inlet TH5 Accumulator Suc...

Page 38: ...7 34 60 18 2 16 6 380 415 Indoor unit fan notch Refrigerant volume Total current Volts Indoor unit SC LEV1 High pressure Low pressure after O S before Accumulator Pressure DB WB Set m kg A V Pulse MPa C Condition Sectional temperature Outdoor unit LEV opening Discharge TH1 Heat exchanger inlet TH5 Accumulator Suction Comp Shell bottom Comp Heat exchanger outlet Heat exchanger inlet Inlet Outlet Ou...

Page 39: ...n ON 7 C For 2minutes For 2minutes 2000 Pump down 53 C Valid Before power is turned on During normal operation when power is on Should be set on OFF Before power is turned on Before power is turned on During normal operation when power is on During normal operation when power is on only when switching from OFF ON During normal operation when power is on During normal operation when power is on Exc...

Page 40: ...utes SW3 2 Function valid All indoor units test operation ON 7 C 15 C Valid 53 C Model P250 Valid Before power is turned on During normal operation when power is on Should be set on OFF Before power is turned on Before power is turned on During normal operation when power is on During normal operation when power is on During normal operation when power is on Except during defrosting During normal ...

Page 41: ...valid All indoor units test operation ON 3 C 15 C For 2minutes For 2minutes 2000 Pump down 53 C Valid Before power is turned on During normal operation when power is on Should be set on OFF Before power is turned on Before power is turned on During normal operation when power is on During normal operation when power is on only when switching from OFF ON During normal operation when power is on Dur...

Page 42: ...Cool only Provided Provided Provided 2nd setting Horizontal Ineffective Ineffective Room temp sensor position Clogged filter detect Filter duration OA intake Remote display select Humidifier control Heating thermo OFF airflow Heating thermo OFF airflow Power failure automatic return Power source start stop Model selection Louver Vane Vane swing function Vane horizontal angle V Vane first angle ane...

Page 43: ... Always after powering Always after powering Always after powering 3 1 2 2 way 4 way 3 way 3 1 2 3 1 2 3 1 2 Option Standard PDFY P20 80VM A PEFY P20 80VMM A 100Pa 50Pa 30Pa For other models change the setting of static pressure by replacing the connector Setting of DIP SW4 Setting of DIP SW5 1 2 3 4 5 ON OFF ON OFF ON OFF ON OFF OFF OFF OFF OFF ON ON OFF OFF OFF ON ON OFF ON OFF ON OFF OFF OFF ON...

Page 44: ...tdoor unit electrical part box have a lot of high voltage portion be sure to follow the instructions shown below During energizing power source never touch inverter power portion because high voltage approx 580V is applied to inverter power portion When checking Shut off main power source and check it with tester etc Allow 10 minutes after shutting off main power source Open the MAIN board mountin...

Page 45: ... mode Check humidifier operations and water supply status in heating test run mode 1 2 3 4 5 Result 1 2 3 Work Disassembling and assembling of drain water removing mechanism Mounting of float switch Electric wiring Float switch moves smoothly Float switch is mounted on mounting board straigh and without deformation Float switch has no contact with copper pipe Wiring procedure is exactly followed C...

Page 46: ...cting combination of outdoor unit and indoor unit followed Maximum number of indoor units which can be connected connecting model name and total capacity Follow limitation of refrigerant piping length For ex ample 80m or less total length 240m at the farthest Connecting piping size of branch piping correct Refrigerant piping diameter correct Refrigerant leak generated at connection Insulation work...

Page 47: ...ystem set Before starting Error stop or not operate Can not be properly set with power source turned on Not operate Set temperature not obtained at heating operations Thermostat stop is difficult Error stop Error stop compressor trouble 1 2 1 2 3 4 Address setting properly done M NET Remote controller indoor unit and outdoor unit Setting of address No done when shutting off power source Address nu...

Page 48: ...ly 8 Make sure that interlocking devices such as ventilator operate normally if any 9 Press ON OFF button to cancel test run Stop operation Note 1 If check code is displayed on remote controller or remote controller does not operate normally 2 Test run automatically stops operating after two hours by activation of timer set to two hours 3 During test run test run remaining time is displayed on tim...

Page 49: ...tion This switch is used to retrieve identify the content of g roup and interkloced connection information registered This switch is used to retrieve identify the content of group and interlocked connection information registered This switch selects the case to register indoor units as group group setting mode or that as interlocked interlocked setting mode The unit address is shown at one spot fo...

Page 50: ... information of indoor units The address of the registered indoor units in group is retrieved identified Retrieval identification of registration information The connection information of any unit indoor outdoor units remote controller or the like is retrieved identified Deletion of group registration information of indoor units The registration of the indoor units under group registration is rele...

Page 51: ...t the same time for 2 seconds to FILTER change to the original ordinary mode with the remote controller under stopping Remote controller under stopping HO under displaying Ordinary mode INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C ERROR CODE OAUNITADDRESSNO C 1 1 Group setting mode Confirm the indoor unit address No Confirm the connection ...

Page 52: ...roller or the like is displayed Operation procedure 1 With the remote controller under stopping or at the display of HO continuously press the FILTER switch A B at the same time for 2 seconds to change to the registration mode 2 Operate switch G for the interlocked setting mode See figure below 3 Assign the unit address of which registration information is desired to confirm with the TIMER SET swi...

Page 53: ...on continuously press the FILTER switch A B at the same time for 2 seconds to change to the original ordinary mode with the remote controller under stopping ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C INDOOR UNIT ADDRESS NO ERROR CODE OAUNITADDRESSNO C 1 Set the address 2 Press the switch for confirmation E Registered No registration Same display will appear wh...

Page 54: ...d press switch E to call the address to be deleted See the figure below As the error display on the remote controller is usually transmitted from the indoor unit OA UNIT ADDRESS No is used as the address of the indoor unit 4 Press the CLOCK ON OFF switch F twice See the figure below 5 After completing the deletion continuously press the FILTER switch A B at the same time for 2 seconds to return to...

Page 55: ...ter 3 minutes restart When compressor stops in cooling or heating mode After operation stops During defrosting operations During oil recovery opera tions During 30Hz operations at fall in low pressure or low pressure saturation tempera ture 3minutes or more after starting When high pressure rises Pd When high pressure rises Pd during 30Hz operations 3 minutes after starting SV1 ON Open OFF Close T...

Page 56: ...uency change is controlled corresponding to evaporation temperature and high pressure saturation temperature 3 1 Back up of frequency control by bypass valve PUHY P 200 250 315 PURY P200 250 During low frequency operation frequency is backed up by turning on opening bypass valve SV1 Cooling 3 minutes after starting compressor bypass valve is turned on when Discharge Pressure Pd is higher than 2 5 ...

Page 57: ...reaced from 39 minutes to 90 minutes by setting SW2 8 ON t or completion of defrosting operations and will last for 10 minutes 2 Completion of defrosting operations Defrosting operations stop when 10 minutes It has passed since start of defrosting operation or piping temperature TH5 reaches 10 C or more Defrosting operations do not stop for 2 minutes after starting except when piping temperature e...

Page 58: ...le during defrosting operations When trouble is detected during defrosting operations the defrosting operations stop and defrosting prohibition time decided by integrated operation time of compressor is set to be 20 minutes 5 Change in number of operating indoor units during defrosting operations In case number of operating indoor units changes during defrosting operations the defrosting operation...

Page 59: ...performed and frequency is less than 60Hz and Td is greater than 105 C 15 minutes has passed from starting the compressor A1 0 for 3 minutes 1 minute has passed from starting the compressor 30 minutes has passed after finishing previous refrigerant recovery and compressor frequency is greater than 60Hz or Td less than 105 C or 15 minutes has passed since previous recovery was performed and frequen...

Page 60: ...eds the capacity of the outdoor heat exchanger is controlled by regulating the fan volume of the outdoor unit by phase control and controlling the number of fans and by using the solenoid valves to vary the number of out door heat exchangers being used Fan is full operation for 5 seconds after starting Outdoor unit fan stops during defrosting operations Lower the fan strength upper limit to approx...

Page 61: ...r the power has been turned on Flow chart of initial start mode Start of initial operation mode Initial operation mode is finished Step 1 The compressor operated at F 38Hz Finished operating time reaches 5 minutes Step 2 The compressor is operated at less than or equal to F 60Hz Operates continuously for 20 minutes and finishes 60 ...

Page 62: ...n liquid side pressure PS1 Liquid level control 3 Differential pressure control 2 60 Differential Pressure control 2 2 Control of BC Controller 1 Control of SVA SVB and SVC SVA SVB and SVC are turned on and off depending on connection mode Cooling Heating Stop Defrost SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF 2 Control of LEV LEV opening sj is controlled corresponding to operation m...

Page 63: ...erating normally outdoor unit shows only LED display without undergoing stop Note 3 On PUHY system operation mode conforms to mode command by indoor unit However when outdoor unit is under cooling operation the operation of indoor unit will be prohibited even by setting indoor units under operation or indoor unit under stopping or fan mode to heating mode Reversely when outdoor unit is being heati...

Page 64: ...Normal operations Trouble observed Stop Solenoid valve OFF LEV fully closed Start Breaker turned on Operation command 1 Operation mode judgement cooling only heating only cooling heating mixed 2 Transmission to outdoor unit Receiving operation mode command from outdoor unit Error mode Cooling only operations Heating only operations Cooling main operations Heating main operations Operation mode Ope...

Page 65: ...g operations Prohibition Prohibition Cooling heating automatic operations Dry operation Fan operations Prohibition Remote controller blinking Note 3 Note 3 Note 3 Note 1 Note 2 Note 1 Note 1 Indoor unit LEV fully closed Opening 60 41 Note 2 Two error codes include indoor unit troub le BC controller trouble and outdoor unit side trouble In the case of indoor unit trouble error stop is observed in t...

Page 66: ... valve OFF PURY 6 BC controller LEV fully closed PURY 1 Inverter frequency control 2 Indoor unit LEV control 3 Solenoid valve control 4 Outdoor unit fan control 5 BC controller solenoid valve control PURY 6 BC controller LEV control PURY Cooling operation 4 way valve OFF Indoor unit fan operations Test run start Thermostat ON Normal operations Test run Stop 3 minute restart prevention 65 ...

Page 67: ...control 7 52C control PURY 1 Indoor unit fan stop 2 Inverter defrost frequency control 3 Indoor unit LEV fully opened 4 Solenoid valve control 5 Outdoor unit fan stop 6 BC controller solenoid valve control PURY 7 BC controller LEV control PUR 8 52C control Y Heating operation 4 way valve ON Defrosting operation Test run start 4 way valve OFF Thermostat ON 3 minute restart prevention Note 1 When ou...

Page 68: ... with compressor low speed OFF operations Dry operations 4 way valve OFF Inlet temp 18 C Note 2 Thermostat ON Test run start Note 1 Note 1 When indoor unit inlet temperature exceeds 18 C outdoor unit compressor and indoor unit fan start intermittent operations synchronously Operations of outdoor unit BC controller PURY indoor unit LEV and solenoid valve accompanying compressor are the same as thos...

Page 69: ...protection 20 C 250kΩ 70 C 34kΩ 30 C 160kΩ 80 C 24kΩ 40 C 104kΩ 90 C 17 5kΩ 50 C 70kΩ 100 C 13 0kΩ 60 C 48kΩ 110 C 9 8kΩ 1 Detects the saturated vapor temperature 2 Calculates the refrigerant circula tion configuration 3 Controls the compressor fre quency 4 Controls the outdoor unit s fan air volume 1 Frequency control 2 Defrost control and liquid level detection at heating 1 Outdoor air temperatu...

Page 70: ...d heating CH1 Crank case heater Heating of compressor refrigerant 1 Indoor unit control freeze prevention hot adjust etc 2 LEV control in heating operation Subcool detection LEV control in cooling operation Superheat detector R50 17kΩ B25 50 4170 Rt 17exp 4170 20 C 605 0kΩ 50 C 17 0kΩ 10 C 323 3kΩ 60 C 11 5kΩ 0 C 180 9kΩ 70 C 8 0kΩ 10 C 105 4kΩ 80 C 5 7kΩ 20 C 63 8kΩ 90 C 4 1kΩ 30 C 39 9kΩ 100 C 3...

Page 71: ...ol subcool control R0 15kΩ B0 100 3460 Rt 15exp 3460 0 C 15kΩ 10 C 9 7kΩ 20 C 6 4kΩ 25 C 5 3kΩ 30 C 4 3kΩ 40 C 3 1kΩ Continuity check by a tester Same as LEV of indoor unit 1 273 0 AC 220 240V Open when energized Closed when de energized 12V DC stepping motor drive 0 to 2000 valve opening pulse Supplies refrigerant to cooling indoor unit Supplies refrigerant to heating indoor unit Supplies refrige...

Page 72: ... 71 ...

Page 73: ... Refrigerant Amount 1 Symptom The symptoms shown in the table below are the signs of excess or lack of refrigerant amount Be sure to adjust refrigerant amount in refrigerant amount adjustment mode by checking operation status judging refrigerant amount and performing selfdiagnosis with LED for overall judgement of excess or lack of refrigerant amount Tendency of discharge temperature During coolin...

Page 74: ...perature is high the difference with the low pressure saturation temperature is 60 K or greater 5 Shell temperature is low the difference with the low pressure saturation tem per 6 Liquid level AL 2 Determined based on the extent of overheating of discharged refrigerant Refrigerant Volume Checking the Operating Condition ature is 5 K or lower 2 Check the refrigerant volume by self diagnosis using ...

Page 75: ...quid pipe m L3 Length of ø9 52 liquid pipe m L1 Length of ø19 05 liquid pipe m L4 Length of ø6 35 liquid pipe m refer to the calculation table In the calculation results round up fractions smaller than 0 01 kg Example 18 54 kg 18 6 kg Calculation Table Total Capacity of Connected Indoor Units 160 1 5 kg 161 330 2 0 331 480 2 5 Caution R407C unit When charging with refrigerant be sure to charge fro...

Page 76: ... starting refrigerant volume adjustment mode if left for a sufficient length of time once the refrigeration system has stabilized there are times when this level may become unsuitable 1 The refrigerant volume is suitable When the refrigerant volume for TH5 TH7 is more than 5K at the outdoor unit and 6 to 13K for SH at the indoor unit 2 The current volume is suitable however may become unsuitable a...

Page 77: ... run in test cooling mode Minimum of 30minutes continuous operation TH1 equal or less than 100 C Add a small amount of refrigerant to the low pressure service port Power supply to outdoor unit has been on for 8 hours or 30minutes of compressor running and a stable compressor frequency Tc TH5 is less than or equal to 10K and greater than or equal to 3K TH1 less than or equal to 95 C Tc TH7 is great...

Page 78: ...to adjust the refrigerant volume in the winter season Note 2 When performing the refrigerant adjustments in cooling mode the liquid must be greater than 1 37MPa Note 3 Judgment by the AL is at best only a rough guideline Please do not add refrigerant based on the AL reading alone Be sure to obtain calculations of the correct amount before adding refrigerant Measure A Turn on the outdoor unit self ...

Page 79: ...indoor units are run in test cooling mode Minimum of 30minutes continuous operation TH1 equal or less than 100 C Add a small amount of refrigerant to the low pressure service port Power supply to outdoor unit has been on for 8 hours or 30minutes of compressor running and a stable compressor frequency SC11 is greater than or equal to 5K Note 3 TH1 less than or equal to 95 C SC16 greater than or equ...

Page 80: ...case of total replacement or replenishment of refrigerant in this system the following evacuation and refrigerant replenishment procedures are required 1 Perform evacuation by connecting to system analyzer joint of service port of high pressure ball valve and high pressure charge plug and joint of service port of low pressure ball valve and low pressure charge plug 2 Perform refrigerant charge fro...

Page 81: ...not change the affected pressure sensor is faulty 3 Disconnect the pressure sensor from the MAIN board and check the pressure according to the LD1 display a If the pressure is 0 1 kg cm2 G 0 098MP for low pressure a y the affected pressure sensor is faulty b If the pressure is 32 kg cm2 G 3 14MPa for high pressure or higher the MAIN board is faulty If ambient temperature is below 30 C main board i...

Page 82: ... conditions during cooling only operations 2 Outdoor unit fan LED Display Fan Stop Full speed 0 100 3 Multi directional valve features When power is OFF Used as a conductor for the cooling circuit between the oil separator outlet and heat exchanger and the gas ball valve BV1 and accumulator When power is ON Used as a conductor for the heating circuit between the oil separator and gas ball valve an...

Page 83: ... the rise in the high pressure in the cooling mode and heating mode so check its operation by the LED display and the operating noise emitted by the solenoid valve Conditions during operation See Control of Outdoor Unit 2 SV3 6 Control of heat exchanger capacity a Operations can be confirmed by LED display and operating sound of solenoid valve because one or more of SV3 5 are turned on depending o...

Page 84: ... refer to the Refrigerant Circuit Diagram And ON OFF of Solenoid valve is depends on the amount of running indoor units ambient temperature and so on So please check by LED Monitor Display The SV coil is taken off then it is possible to open caps and check plungers But the special tool which is on the Service Parts List is needed Closed torque 1 3N m 83 ...

Page 85: ...t phases are off 2 When the output is out of phase or remains ON continuously the motor cannot run smoothly but move jerkily and vibrates When the power is switched ON a 520 pulse valve opening signal is output to make sure the valve s position so that it is definitely at point A Pulse signal is output for approximatly 17 seconds When the valve operates smoothly there is no sound from the LEV and ...

Page 86: ... change in the following orders when the Valve is Closed 1 2 3 4 1 Valve is Open 4 3 2 1 4 1 When the LEV opening angle does not change all the output phases are off 2 When the output is out of phase or remains ON continuously the motor cannot run smoothly but move jerkily and vibrates When the power is switched ON a 2200 pulse valve opening signal is output to make sure the valve s signal is outp...

Page 87: ...ature sensor will become low If the temperature is considerably low compared to the remote control s intake temperature display it can be judged that there is not a fully closed failure In the case of minimal leakage it is not necessary to replace the LEV if there are no other effects 1 Check for pins not fully inserted on the connector and check the colors of the lead wires visually 2 Disconnect ...

Page 88: ...o fasten the body in such a way that it will not move Installing the Coils Fasten the body tightly at the bottom Part A in the figure so that the body will not move then insert the coils from the top inserting the coils stopper securely in one of the indentations on the body There are four indentations for the stopper on the body around its circumference and it doesn t matter which indentation is ...

Page 89: ...low in the pipe 6 7 8 and 9 are depend on ON OFF of the SV3 4 5 and 6 Please confirm by LED monitor display You can open the cap of valve A B and C but 3 types of hexagon socket screw keys The size is as follows Closed torque A 0 17N m B 2 0N m C 1 3N m 6 ...

Page 90: ... being used properly in the necessary environment and that the shield wire ground is appropriate 1 Due to a large capacity electrolytic capacitor used in the inverter voltage still flows through even after cutting the main power creating the possibility of electric shock As a result wait for a sufficient length of time 5 10 min after cutting the main power and check the voltage at both terminals o...

Page 91: ...rror 4250 detailed No 101 102 103 104 105 106 107 2There is a high possibility of an inverter circuit error if the voltage unbalance across all wiring is greater than 5 or 5V 3No voltage unbalance across all wiring 2No voltage unbalance across all wiring Refer to item 5 for inverter circuit trouble 4 Check to see if the inverter is damaged Perform this check if an error occurs during steady op era...

Page 92: ...alance or error recurrence after replacement Replace the INV board IPM replacement In the case of an output voltage unbalance or error recurrence after replacement Replace the G A board In the case of an output voltage unbalance or error recurrence after replacement Replace the INV board Check item 1 2 3 Phenomena Treatment Perform Meg check between the terminals in the power terminal block Tba Tu...

Page 93: ...inals 1Ω or lower almost 0Ω Measure the resistance between terminals and the chassis Measure the resistance between terminals 0 1k 1 5kΩ Measure the resistance value at each terminal Disconnect the CNCT2 target connector and check the resistance between terminals 280Ω 30Ω 1 2PIN U phase 3 4PIN W phase Check the ACCT connecting phase and direction U Check Location A1 A2 1 L1 2 T1 3 L2 4 T2 5 L3 6 T...

Page 94: ...r Pre Driver Pre Driver Pre Driver Over heating Temperature sensor protection circuit 16 10 7 4 1 1 Focus on whether there is a complete open Ω state or short circuit 0Ω The measured resistance value is a guideline and may deviate slightly Measure between several similar measurement points If the value does not differ by more than double or half from the other points then judge the state as OK 2 R...

Page 95: ...lly after finishing other works For the wiring of the base for IPM observe the wiring diagram below care fully as it has many terminals 2 Coat the grease for radiation provided uniformly onto the radiation surface of IPM diode modules Coat the grease for radiation on the full surface in a thin layer and fix the module securely with the screw for fastening As the radiation grease attached on the wi...

Page 96: ...t supplied 1 The original power supply of the outdoor unit is not turned on 2 Disconnection of connectors on the board of the outdoor unit Main board CNS1 CNVCC3 INV board CNAC2 CNVCC1 CNL2 3 Power supply circuit defects of the outdoor unit For detail refer to Pages 127 INV board defects Blown fuse F1 on INV Board Diode stack destruction Prevention resistance of rush current R1 damage 2 Transmissi...

Page 97: ...cts on the control board of the BC controller Check method and handling NO YES NO NO YES YES YES NO 1 Check the BC controller power terminal block voltage 220 240V Fuse blown off Removed Within spec Fuse check on the board Connector removal checks CN03 CN12 CNTR Connector connection defects Modify the defective places Check for factors of transformer cut Earth route on the board Earth route of sen...

Page 98: ...on of the terminal block connection 3 Reversed wiring cross over in the group control 4 Wire by mistakes the MA remote control to the terminal block TB5 for the transmission line 5 Connect by mistakes the M NET transmission line to the MA remote control terminal block TB13 7 The unit address is not 00 as it should be with automatic address setting 8 The address of Indoor Unit becomes 51 or more 9 ...

Page 99: ...ard Blown fuse on indoor controller board Faulty or disconnected transformer of indoor unit Faulty indoor controller board 2 Faulty outdoor control circuit board uncontrolled As normal transmission is fails between indoor and outdoor units outdoor unit model can not be recognized Checking method countermeasure a Check transmission terminal block of remote controller for voltage i In case of 17 30V...

Page 100: ...3 Disconnection of centralized control transmission line TB7 at outdoor unit 14 At system connected with MELANS power supply connector CN40 is inserted to centralized control transmission line of outdoor unit Checking method countermeasure In case MELANS is not used In case with MELANS used When MELANS is used HO display on the remote controller will disappear at the group registration of the indo...

Page 101: ...egistration and confirmation 1 Erroneous address of unit to be coupled 2 Disconnection of transmission line of unit to be coupled No connection 3 Faulty circuit board of unit to be coupled 4 Installation miss of transmission line Confirmation of different refrigerant system controller 5 Disconnection of power source of outdoor unit to be confirmed 6 Disconnection of centralized control transmissio...

Page 102: ... on the INV board Check the voltage between L2 and N on power supply terminal block TB1 DC24 30 V Except the above mentioned Connector disconnected Except the above mentioned DC24 30 V Except the above mentioned DC24 30 V Except the above mentioned 0 5 2 5Ω Except the above mentioned 19 25Ω Except the above mentioned 0Ω Except the above mentioned AC198 264 V Except the above mentioned AC198 264 V ...

Page 103: ...inuously due to the entry of fine noise Transmission can be made normally but reply ACK or answer can not be issued normally due to noise 2 Method to confirm wave shape Check the wave shape of transmission line with an oscilloscope to confirm that the following conditions are being satisfied 1 The figure should be 104µs bit 1 2 No finer wave shape noise than the transmission signal 52µs 1 should b...

Page 104: ... Without earthing transmission signal may be changed as the noise on the transmission line has no way to escape For the shield earth of the transmission line for centralized control the effect of noise can be minimized if it is from one of the outdoor units in case of the group operation with different refrigerant systems and from the upper rank controller in case the upper rank controller is used...

Page 105: ...ecutive minutes a MA communication error 6831 will occur 1 Symptoms caused by infiltration of noise on transmission cable A1 B2 No polarity Across terminal No 1 2 Power supply 9V to 12VDC 12msec bit 5 must be satisfied Voltage across terminal No 1 2 must be within range shown on left 2 Confirmation of transmission specifications and waveform 1 2 MA remote controller Transmission waveform Across te...

Page 106: ...e at parts where screws are tightened 4 check the wiring polarity 5 check for a broken wire and 6 check for ground ing TB1A NF TB1B CNTR1 T01 CNTR TB1B CNPOW CNFAN CN04 CNMF CNFC1 CNFC2 Check if the wiring polarity is as shown on the wiring diagram plate Measure the resistance of the motor s coils 20 60Ω Measure the motor s insulation resistance with a megger 10 MΩ DC 500 V or more If a fuse is de...

Page 107: ...res sure sensor OK R e p l a c e t h e w r o n g puressure sensor by the correct pressure sensor and confirm detected pres sure is indicated correctly Short connectors 2 and 3 on the board and check the pressure Pressure range within 0 to 0 098MPa Pressure of at least 3 14MPa indicated Remove the pressure sensor connector from the board and check the pressure Check for the faulty connec tor on app...

Page 108: ...g principal Normal Insufficient cooling SC11 large SC16 small PHM 0 SC11 large SC16 small PHM 0 Warm indoor SC small Warm in door thermo ON especially noisy SC11 small SC16 small PHM 0 Insufficient heating Warm indoor SC small Warm indoor thermo ON especially noise Measured Data High pressure of outdoor Low pressure satura tion temperature Low pressure of outdoor BC controller pressure liquid meas...

Page 109: ...ck thermistor resistance value Compare temperature for thermistor resistance value with actual mea sured valued No difference Insert applicable thermistor connector into board and check sensor input temperature on LED monitor for differ ence No difference No abnormality Change thermistor Check for connection problem Change the controller board Note 5 Yes No No Yes Note 4 Note 2 Note 1 Note 3 ...

Page 110: ...istance measurement point connector Temperature sensor resistance graph Note 4 Check using LED monitor display switch outdoor MAIN board SW1 Measured Data Signal SW1 Setting Remarks Liquid inlet temperature TH11 See converter Bypass outlet temperature TH12 See converter Bypass outlet temperature TH15 See converter Bypass inlet temperature TH16 See converter Touch the probes of the tester or other ...

Page 111: ...EV 1 fully open LEV3 are not controlled Check if LEV 1 are fully shut Yes Note 2 No Yes No Yes No Yes Check if LEV3 is controlled by superheat LEV3 is not controlled Check if SVA SVC are ON SVA SVC ON Check if SVB is OFF SVB OFF Check if LEV 3 are controlled by differential pressure Completion Check SVB Check SVA SVC Check LEV3 Correct the problem Check LEV1 SVB ON Check if SVB is ON SVA SVC OFF C...

Page 112: ...basic operation characteristics Region Failure mode Operating mode Description Normal range LEV No 1 3 Cooling only Cooling main Heating only Heating main 1 1 3 Normal 2 3 1 Insufficient cooling SH12 small SC11 small SC16 small Branch piping SC small Insufficient cooling insuf ficient heating SH12 small SC11 small SC16 large Branch piping SC small PHM large Heating indoor SC small PHM large Insuff...

Page 113: ...roller board Remove connectors from the board and use a tester to check conduction Check between connectors 1 3 5 and 2 4 6 Use a tester to measure resistance between each coil red white red orange brown yellow brown blue Correct value is 150 10 Adjust repair Check for the following LEV full open ticking sound LEV full closed no sound Change LEV OK Confirm if LEV is closed fully Attach check LEDs ...

Page 114: ...n and connector disconnection or looseness No problem Operate cooler and heater for the applicable solenoid valve s refrigerant system only Clicking noise produced when working timing Measure piping temperature on both sides of solenoid valve and check for following Solenoid valve ON no differential Solenoid valve OFF differential Solenoid valve normal OK Measure pipe temperature of inlet and outl...

Page 115: ...ture of piping on either side of SVA 1 A Measure temperature of piping on either side of SVB 1 B 4 BC controller transformer Cooling Heating Stopped Defrosting SVA ON OFF OFF OFF SVB OFF ON OFF OFF SVC ON OFF OFF OFF Mode Branch port Normal Malfunction CNTR 1 3 Approximately 90Ω Open or shorted CN03 1 3 Approximately 1 7Ω Disconnect the connector before measurement CNTR CN03 BC Controller control ...

Page 116: ...d then remove the panel 3 Remove the nine screws securing the ceiling panel and then remove the panal 2 Control Box Removing the two screws that secures the electric panel box cover provides access to the controller board and all of the relay board for checking So it is not necessary to work according to above 2 Procedure Photos Be careful on removing heavy parts Front panel Ceiling panel Loosen o...

Page 117: ...re sensor lead securely to the controller board 4 Pressure Sensor Procedure Photos 1 Remove the front panel 1 Use the procedure under 1 1 2 to check PS1 and PS3 2 Disconnect the connector of the applicable pressure sensor from the controller board and insulate the connector 1 Liquid pressure sensor CNP1 2 Intermediate pressure sensor CNP3 3 Install a new pressure sensor at the location shown in th...

Page 118: ...re the unit can be lowered from the ceiling before starting work 6 Solenoid Valve Coil Procedure Photos 1 Remove the service panel See 1 1 2 3 2 Disconnect the connector of the applicable solenoid valve 3 Remove the solenoid valve coil 1 SVA SVB solenoid valve coils can be serviced from the maintenance port SVC can serviced from the back if service space is available in the back To remove the back...

Page 119: ... H W peak detect DCCT overcurrent abnormality H W peak detect IPM short grounding abnormality Load short abnormality ACCT overcurrent abnormality S W detect peak current ACCT overcurrent abnormality S W detect effective current Cooling fan abnormality 4240 IAC sensor abnormality IDC sensor abnormality IAC sensor circuit abnormality IDC sensor circuit abnormality IPM open ACCT connection abnormalit...

Page 120: ...1 5106 Preliminary ambient temperature thermal sensor abnormality TH6 1402 1302 Preliminary high pressure abnormality or preliminary pressure sensor abnormality 1600 1500 Preliminary overcharged refrigerant abnormality 1605 4330 4230 4340 4240 4360 4260 Preliminary suction pressure abnormality 1607 4300 0403 121 4300 5301 4320 4220 4350 4250 115 116 117 118 119 120 108 101 102 103 104 105 106 107 ...

Page 121: ...e fuse is melted if the resistance between the both ends of fuse is replace the fuse If none of the items in 1 to 3 is appli cable and if the trouble reappears even after the power is switched on again replace the circuit board by the follow ing procedure when replacing the cir cuit board be sure to connect all the connectors ground wires etc se curely 1 If serial transmission is restored af ter t...

Page 122: ...all valve is fully opened Check outdoor fan See Trouble check of outdoor fan Check operation status of cooling only or heating only See Trouble check of solenoid valve Check resistance of thermistor Check inlet temperature of sensor with LED monitor 1 Gas leak gas shortage 2 Overload operations 3 Poor operations of indoor LEV 4 Poor operations of OC controller LEV Cooling LEV1 5 Poor operations of...

Page 123: ...ssure sen sor Check inlet temp and press of sensor by LED monitor 1 Gas leak Gas shortage 2 Insufficient load operations 3 Poor operations of indoor LEV 4 Poor operations of OC controller LEV Cooling LEV1 5 Poor operations of BC controller LEV Cooling only LEV3 Cooling main LEV1 3 Heating only Heating main LEV3 Defrost LEV3 6 Poor operations of BC controller SVB Heating only Heating main 7 Solenoi...

Page 124: ...ations of BC controller SVB Heating only heating main 6 Solenoid valve SV 3 6 trouble PURY SV3 4 PUHY P Cooling only cooling main 7 Setting error of connection address 8 Poor operations of ball valve 9 Short cycle of indoor unit 10 Clogging of indoor unit filter 11 Fall in air volume caused by dust on indoor unit fan 12 Dust on indoor unit heat exchanger 13 Indoor unit fan block motor trouble 8 13...

Page 125: ... caused by dust on indoor unit fan 11 Dust on indoor unit heat exchanger 12 Indoor unit fan block motor trouble 8 12 Rise in high pressure caused by lowered condensing capacity in heating only and heating principal operation 13 Short cycle of outdoor unit 14 Dust on outdoor unit heat ex changer 15 Outdoor unit fan block motor trou ble poor operations of fan control ler 13 15 Rise in high press cau...

Page 126: ...ion mode is entered After three minutes the outdoor unit starts up again If the discharge SH 10K is detected again within 30 minutes after the outdoor unit stops second detection an abnormal stop is applied and 1500 is displayed If discharge SH 10K is detected more than 30 minutes after the outdoor unit stops the state is the same as the first detection and the same operation as 1 above takes plac...

Page 127: ...trouble 1 Drain sensor sinks in water be cause drain water level rises due to drain water lifting up mechanism trouble 2 Broken wire of indirect heater of drain sensor 3 Detecting circuit circuit board trouble 1 Thermistor trouble 2 Poor contact of connector insufficient insertion 3 Full broken of half broken ther mistor wire 4 Indoor unit circuit board detecting circuit trouble 1 Drain up input t...

Page 128: ...etween each of the wires Check 1 the connections 2 the con tact at the connector 3 the tightening torque at screw tightening locations and 4 for wiring disconnections TB1A NF TB1B CNTR1 F3 T01 CNTR Refer to the circuit number and the wir ing diagram plate If F1 on the MAIN board or F3 is melted Resistance between both ends of the fuse is replace the fuses To judge failure of the T01 go to Indi vid...

Page 129: ...roller board 2 Disconnection of fan output connec tor FAN1 of indoor power board 3 Disconnection of fan speed detecting connector CN33 of indoor controller board or that of fan output connector FAN1 of indoor power board 4 Filter cologging 5 Trouble of indoor fan motor 6 Faulty fan speed detecting circuit of indoor controller board or faulty fan output circuit of indoor power board Confirm disconn...

Page 130: ...nnection VDC error Error details No 110 Bus voltage error If Vdc 772V or Vdc 308V is detected Logic error Error details No 111 If only the H W error logic circuit operates and no identifiable error is detected 1 Same as error details No 108 and 109 for 4220 error Check the voltage at the power terminal board TB1 Replace the INV board if there is no problem with the power supply Same as error detai...

Page 131: ...ooling fan failure 4 Wiring defect 5 THHS failure 6 INV board fan output failure 7 Cooling fan failure 8 Current sensor ACCT failure 9 Inverter circuit failure 10 Compressor failure Check the cooling fan operation under the above operating con ditions Ensure that the heat sink tem perature is 55 C or more and that 220 240V is applied to the inverter PCB connector CNFAN when the inverter is on Chec...

Page 132: ...ompressor side detected just before starting the inverter Cooling fan error If the heat sink temperature THHS 95 C for 10 minutes or over when the inverter starts 1 Inverter output related VII 5 2 inverter output related trouble processing Refer to 1 5 1 7 2 inverter output related trouble processing Refer to 1 5 Same as 4230 error 1 Inverter output related 1 Compressor grounded Refer to 1 7 2 2 C...

Page 133: ... section TH16 Thermal sensor abnormality Outdoor Unit Check the thermistor s resistance Check if the lead wires are pinched Check for tearing of the insulation Check if a pin is missing on the con nector Check if a wire is disconnected Check the temperature picked up by the sensor using the LED monitor If the deviation from the actual tem perature is great replace the MAIN cir cuit board In the ca...

Page 134: ... Coming off of pin at connector por tion poor contact 5 Broken wire 6 Faulty thermistor input circuit of MAIN board 1 Pressure sensor trouble 2 Inner pressure drop due to gas leak 3 Broken cover 4 Coming off of pin at connector por tion poor contact 5 Broken wire 6 Faulty pressure sensor input circuit of control board See Troubleshooting of pressure sensor SeeTroubleshooting of pressure sensor 1 5...

Page 135: ...erter circuit fault 5 Inverter circuit is faulty Refer to 1 7 2 2 Check compressor ground fault and winding error 4 Compressor is disconnected DCCT sensor circuit error Error details No 118 An abnormal value was de tected with the DCCT detec tion circuit just before the INV started Check the contacts around the INV board connector CNCT and DCCT side connector If there is no problem up to step 2 re...

Page 136: ...inuing operation over 5 minutes The transmission wave shape noise on the transmission line should be investigated in ac cordance with Investigation method of trans mission wave shape noise 1 Two or more controllers of outdoor unit indoor unit remote controller BC controller etc have the same address 2 In the case that signal has changed due to noise entered into the trans mission signal 1 At the c...

Page 137: ...e Checking code 6602 6603 Meaning detecting method Cause Checking method Countermeasure Transmission line installed while turning power source on Check power source of indoor unit 220V 240V Shut off the power source of outdoor in door units BC controller and make it again Erroneous power source work Erroneous transmis sion work Check transmission line work and shield Ground fault or shield contact...

Page 138: ... of OC or BC 2 Damping of transmission line voltage signal by acceptable range of transmission wiring exceeded Farthest Less than 200m Remote controller wiring Less than 10m 3 Erroneous sizing of transmission line Not within the range below Wire diameter 1 25mm2 or more 4 Faulty control circuit board of OC 1 When Fresh Master address is changed or modified during operation 2 Faulty or disconnectio...

Page 139: ...n be consider ed Total capacity error 7100 Capacity code setting error 7101 Connecting set number error 7102 Address setting error 7105 1 Cause of 1 3 of Cause for single refri gerant system 2 Disconnection or short circuit of transmission line of OC terminal block for centralized control TB7 3 Shut down of OC unit power source of one refrigerant system 4 Neglecting insertion of OC unit power supp...

Page 140: ...rtion of power supply connector CN40 into OC unit transmission line for centralized control 3 Disconnection or power source shut down of power supply unit for transmission line 4 Faulty system controller MELANS Same cause as that for plural refrigerant system Trouble of partial IC units 1 Same cause of that for single refrigerant sys tem Trouble of all IC in one refrigerant system 1 Error detected...

Page 141: ...r power shutdown of power supply unit for transmission line 4 Faulty MELANS 1 IC unit is keeping the memory of the original group setting with RC although the RC ad dress was changed later The same symptom will appear for the regis tration with SC 2 IC unit is keeping the memory of the original interlocking registration with Fresh Master with RC although the Fresh Master address was changed later ...

Page 142: ...ethod Cause Checking method Countermeasure Total capacity error Total capacity of indoor units in the same refrigerant system ex ceeds limitations Trouble source Outdoor unit Capacity code error Error display at erroneous con nection of Indoor unit of which model name can not be con nected Trouble source Outdoor unit Indoor unit Connected unit count over Number of units connected in the same refri...

Page 143: ... turn on a Replace the old remote controller by the new remote controller 7110 Transmission lince power failure Check transmission booster and power supply Disconnection of plug on main board 7113 7130 Main board connection failure Check all main board connectors and rectify faulty connection Checking code Meaning detecting method Cause Checking method Countermeasure If the model name plate on the...

Page 144: ...valve THHS In Th Thermistor verter radiator panel IC Indoor unit LEV Electronic expansion valve COMP Compressor SW1 Outdoor unit control circuit board E Memory storage for service activities sampling per minute 7 seg LED The numerical display includes that of pressure temperature or the like while the graphic display includes that of operating condition solenoid valve ON OFF state or the like Nume...

Page 145: ...ets the time in the outdoor unit such as the G 50 is not connected the time and days elapsed from the first time the power was turned on will be displayed If the time setting has been received the count will start from the set date and time Note 3 The time data is not updated when the outdoor unit s power is off When the power is turned off and then on again the count will resume from the time bef...

Page 146: ...on mode Unit No 1 Unit No2 Unit No3 Unit No4 Unit No5 Unit No6 Unit No7 Unit No8 15 11 11 000 000 Unit No9 Unit No10 Unit No11 Unit No12 Unit No13 Unit No14 Unit No15 Unit No16 16 00 00 100 000 17 10 00 100 000 18 01 00 100 000 Indoor unit thermostat ON Unit No 1 Unit No2 Unit No3 Unit No4 Unit No5 Unit No6 Unit No7 Unit No8 19 11 001 00 000 Unit No9 Unit No10 Unit No11 Unit No12 Unit No13 Unit No...

Page 147: ... TH5 36 00 10 010 000 TH6 TH7 TH8 37 1 010 01 0000 38 0 110 01 0000 THHS 63HS 63LS 39 1 110 01 000 0 Error history 1 40 0 001 01 000 0 Inverter error Datail 41 1 001 01 000 0 Error history 2 42 0 101 01 000 0 Inverter error Datail 43 1 101 01 000 0 Error history 3 44 0 011 01 000 0 Inverter error Datail 45 1 011 01 000 0 Error history 4 46 0 111 01 000 0 Inverter error Datail 47 1 111 01 000 0 Err...

Page 148: ...3 1 100 10 1000 THHS 84 0 010 10 1000 85 1 010 10 1000 86 0 110 10 1000 87 1 110 10 1000 88 0 001 10 1000 89 1 001 10 1000 90 0 101 10 1000 OC 91 11 011 01 000 OC 92 0 011 10 1000 93 1 011 10 1000 Qj 94 01 11 101 0 00 Target condensor temperature Tcm 95 11 111 01 000 Target evaporator temperature Tem 96 00 000 11 000 97 10 000 11 000 98 01 000 11 000 99 11 000 11 000 100 00 100 11 0 00 101 10 100 ...

Page 149: ... 01 111 000 IC5 Address Capacity code 123 11 01 111 000 IC6 Address Capacity code 124 00 11 111 000 IC7 Address Capacity code 125 10 11 111 000 IC8 Address Capacity code 126 01 11 111 000 IC9 Address Capacity code 127 11 11 111 000 IC10 Address Capacity code 128 00 00 000 100 IC11 Address Capacity code 129 10 00 000 100 130 01 00 000 100 IC13 Address Capacity code 131 11 00 000 100 IC14 Address Ca...

Page 150: ...0 10 0 163 11 00 010 10 0 164 00 10 010 10 0 Relay output display 1 lighting to display Compressor operation Compressor operation 52C Lights for normal opetation 165 1 010 01 0100 Relay output display 2 lighting to display SV1 SV3 SV4 166 0 110 01 0100 Relay output display 3 lighting to display CH1 167 1 11 001 01 00 Relay output display 4 lighting to display 21S4a 168 00 010 10 100 TH1 169 10 01 ...

Page 151: ...ta 197 1 01 000 11 00 Low pressure sensor data 198 0 11 000 11 00 OC 199 1 11 000 11 00 OC 200 0 00 100 11 00 201 1 00 100 11 00 Qj 202 0 10 100 11 00 Target condensor temperature Tcm Target evaporator temperature Tem 203 1 10 100 11 00 204 0 01 100 11 00 Condensor temperature Tc 205 1 01 100 11 00 Evaporator temperature Te 206 0 11 100 11 00 207 1 11 100 11 00 Real compressor frequency 208 0 00 0...

Page 152: ...Room temperature 232 0001011100 IC 7 Room temperature 233 1001011100 IC 8 Room temperature 234 0101011100 IC 9 Room temperature 235 1101011100 IC 10 Room temperature 236 0011011100 IC 11 Room temperature 237 1011011100 IC 12 Room temperature 238 0111011100 IC 13 Room temperature 239 1111011100 IC 14 Room temperature 240 0000111100 IC 15 Room temperature 241 1000111100 IC 16 Room temperature 242 01...

Page 153: ...010 IC 8 Liquid pipe temperature 266 0101000010 IC 9 Liquid pipe temperature 267 1101000010 IC 10 Liquid pipe temperature 268 0011000010 IC 11 Liquid pipe temperature 269 1011000010 IC 12 Liquid pipe temperature 270 0111000010 IC 13 Liquid pipe temperature 271 1111000010 IC 14 Liquid pipe temperature 272 0000100010 IC 15 Liquid pipe temperature 273 1000100010 IC 16 Liquid pipe temperature 274 0100...

Page 154: ...1011010010 IC 12 gas pipe 302 0111010010 IC 13 gas pipe 303 1111010010 IC 14 gas pipe 304 0000110010 IC 15 gas pipe 305 1000110010 IC 16 gas pipe 306 0100110010 307 1100110010 308 0010110010 309 1010110010 310 0110110010 311 1110110010 312 0001110010 313 1001110010 314 0101110010 315 1101110010 316 0011110010 317 1011110010 318 0111110010 319 1111110010 320 0000001010 321 1000001010 322 0100001010...

Page 155: ...01010 341 1010101010 342 0110101010 343 1110101010 344 0001101010 345 1001101010 346 0101101010 347 1101101010 348 0011101010 349 1011101010 350 0111101010 351 1111101010 352 0000011010 353 1000011010 354 0100011010 355 1100011010 IC 2 SC 356 0010011010 IC 3 SC 357 1010011010 IC 4 SC 358 0110011010 IC 5 SC 359 1110011010 IC 6 SC 360 0001011010 IC 7 SC IC 1 SC 99 9 999 9 361 1001011010 IC 8 SC 362 ...

Page 156: ...8 0010000110 IC 3 LEV opening pulses 389 1010000110 IC 4 LEV opening pulses 390 0110000110 IC 5 LEV opening pulses 391 1110000110 IC 6 LEV opening pulses 392 0001000110 IC 7 LEV opening pulses 393 1001000110 IC 8 LEV opening pulses 394 0101000110 IC 9 LEV opening pulses 395 1101000110 IC 10 LEV opening pulses 396 0011000110 IC 11 LEV opening pulses 397 1011000110 IC 12 LEV opening pulses 398 01110...

Page 157: ...5 Operation mode 423 1110010110 IC 6 Operation mode 424 0001010110 IC 7 Operation mode 425 1001010110 IC 8 Operation mode 426 0101010110 IC 9 Operation mode 427 1101010110 IC 10 Operation mode 428 0011010110 IC 11 Operation mode 429 1011010110 IC 12 Operation mode 430 0111010110 IC 13 Operation mode 431 1111010110 IC 14 Operation mode 432 0000110110 IC 15 Operation mode 433 1000110110 IC 16 Operat...

Page 158: ...IC 6 Filter 456 0001001110 IC 7 Filter 457 1001001110 IC 8 Filter 458 0101001110 IC 9 Filter 459 1101001110 IC 10 Filter 460 0011001110 IC 11 Filter 461 1011001110 IC 12 Filter 462 0111001110 IC 13 Filter 463 1111001110 IC 14 Filter 464 0000101110 IC 15 Filter 465 1000101110 IC 16 Filter 466 0100101110 467 1100101110 468 0010101110 469 1010101110 470 0110101110 471 1110101110 472 0001101110 473 10...

Page 159: ...11011110 494 0111011110 495 1111011110 496 0000111110 497 1000111110 498 0100111110 499 1100111110 500 0010111110 501 1010111110 502 0110111110 503 1110111110 504 0001111110 505 1001111110 506 0101111110 507 1101111110 508 0011111110 509 1011111110 510 0111111110 511 1111111110 512 0000000001 513 1000000001 514 0100000001 515 1100000001 516 0010000001 517 1010000001 518 0110000001 519 1110000001 5...

Page 160: ... 540 0011100001 541 1011100001 542 0111100001 543 1111100001 544 0000010001 545 1000010001 546 0100010001 547 1100010001 548 0010010001 549 1010010001 550 0110010001 551 1110010001 Error detection time 1 Error detection day 1 552 0001010001 553 1001010001 Error detection time 2 0 255 0 255 0 9999 Current date Hour Minute Hour Minute Hour Minute Year Month Day Display alternatly Display alternatly ...

Page 161: ... 569 1001110001 Error detection time 10 570 0101110001 Error detection day 5 Error detection day 6 Error detection day 7 Error detection day 8 Error detection day 9 Error detection day 10 Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Display alternatly Display alternatly Display alternatly Displ...

Page 162: ...nit No10 Unit No11 Unit No12 Unit No13 Unit No14 Unit No15 Unit No16 16 00 001 00 0 00 17 10 001 00 0 00 18 01 001 00 0 00 Indoor unit thermostat ON Unit No 1 Unit No2 Unit No3 Unit No4 Unit No5 Unit No6 Unit No7 Unit No8 19 11 00 100 000 Unit No9 Unit No10 Unit No11 Unit No12 Unit No13 Unit No14 Unit No15 Unit No16 20 00 10 100 000 21 10 10 100 000 22 01 10 100 000 BC all operation mode Cooling o...

Page 163: ...8 0 110 01 0000 THHS1 63HS 63HS 39 1 110 01 0000 Error history 1 40 0 001 01 0000 Inverter error Datail 41 1 001 01 0000 Error history 2 42 0 101 01 0000 Inverter error Datail 43 1 101 01 0000 Error history 3 44 0 011 01 0000 Inverter error Datail 45 1 011 01 0000 Error history 4 46 0 111 01 0000 Inverter error Datail 47 1 111 01 0000 Error history 5 48 00 001 10 000 Inverter error Datail 49 10 00...

Page 164: ...000 80 00 00 101 000 81 10 00 101 000 82 01 00 101 0 00 83 11 00 101 0 00 THHS1 84 00 10 101 000 85 10 10 101 000 86 01 10 101 000 87 11 10 101 000 88 00 01 101 000 89 10 01 101 000 90 01 01 101 000 OC 91 11 01 101 0 00 OC 92 00 11 101 0 00 93 10 11 101 0 00 Qj 94 01 11 101 0 00 Target condensor temperature Tcm 95 1 111 10 10 00 Target evaporator temperature Tem 96 0 000 01 10 00 97 1 000 01 10 00...

Page 165: ... IC6 Address Capacity code 124 001 11 110 00 IC7 Address Capacity code 125 101 11 110 00 IC8 Address Capacity code 126 011 11 110 00 IC9 Address Capacity code 127 111 11 110 00 IC10 Address Capacity code 128 000 00 001 00 IC11 Address Capacity code 129 100 00 001 00 130 010 00 001 00 IC13 Address Capacity code 131 110 00 001 00 IC14 Address Capacity code 132 001 00 001 00 IC15 Address Capacity cod...

Page 166: ...1 0100 161 1 000 01 0100 162 0 100 01 0100 163 1 100 01 0100 164 0 010 01 0100 Relay output display 1 lighting to display Compressor operation 52C Lights for normal opetation 165 10 100 10 100 Relay output display 2 lighting to display SV1 SV3 SV4 SV5 166 01 100 10 100 Relay output display 3 lighting to display SV6 CH1 167 11 100 10 100 Relay output display 4 lighting to display 21S4a 168 0 00 101...

Page 167: ... sensor data 197 10 100 01 100 Low pressure sensor data 198 01 100 01 100 OC 199 11 100 01 100 OC 200 00 010 01 100 201 10 010 01 100 Qj 202 01 010 01 100 Target condensor temperature 203 11 010 01 100 Target evaporator temperature Tem 204 00 110 01 100 Condensor temperature Tc 205 10 110 01 100 Evaporator temperature Te 206 01 110 01 100 207 11 110 01 100 Real compressor frequency 208 00 001 01 1...

Page 168: ...n 226 0100011100 227 1100011100 IC 2 Room temperature 228 0010011100 IC 3 Room temperature 229 1010011100 IC 4 Room temperature 230 0110011100 IC 5 Room temperature 231 1110011100 IC 6 Room temperature 232 0001011100 IC 7 Room temperature 233 1001011100 IC 8 Room temperature 234 0101011100 IC 9 Room temperature 235 1101011100 IC 10 Room temperature 236 0011011100 IC 11 Room temperature 237 1011011...

Page 169: ...perature 265 1001000010 IC 8 Liquid pipe temperature 266 0101000010 IC 9 Liquid pipe temperature 267 1101000010 IC 10 Liquid pipe temperature 268 0011000010 IC 11 Liquid pipe temperature 269 1011000010 IC 12 Liquid pipe temperature 270 0111000010 IC 13 Liquid pipe temperature 271 1111000010 IC 14 Liquid pipe temperature 272 0000100010 IC 15 Liquid pipe temperature 273 1000100010 IC 16 Liquid pipe ...

Page 170: ...as pipe 301 1011010010 IC 12 gas pipe 302 0111010010 IC 13 gas pipe 303 1111010010 IC 14 gas pipe 304 0000110010 IC 15 gas pipe 305 1000110010 IC 16 gas pipe 306 0100110010 307 1100110010 308 0010110010 309 1010110010 310 0110110010 311 1110110010 312 0001110010 313 1001110010 314 0101110010 315 1101110010 316 0011110010 317 1011110010 318 0111110010 319 1111110010 320 0000001010 321 1000001010 32...

Page 171: ...339 1100101010 340 0010101010 341 1010101010 342 0110101010 343 1110101010 344 0001101010 345 1001101010 346 0101101010 347 1101101010 348 0011101010 349 1011101010 350 0111101010 351 1111101010 352 0000011010 353 1000011010 354 0100011010 355 1100011010 IC 2 SC 356 0010011010 IC 3 SC 357 1010011010 IC 4 SC 358 0110011010 IC 5 SC 359 1110011010 IC 6 SC 360 0001011010 IC 7 SC IC 1 SC 99 9 999 9 361...

Page 172: ...EV opening pulses 388 0010000110 IC 3 LEV opening pulses 389 1010000110 IC 4 LEV opening pulses 390 0110000110 IC 5 LEV opening pulses 391 1110000110 IC 6 LEV opening pulses 392 0001000110 IC 7 LEV opening pulses 393 1001000110 IC 8 LEV opening pulses 394 0101000110 IC 9 LEV opening pulses 395 1101000110 IC 10 LEV opening pulses 396 0011000110 IC 11 LEV opening pulses 397 1011000110 IC 12 LEV open...

Page 173: ... 424 0001010110 IC 7 Operation mode 425 1001010110 IC 8 Operation mode 426 0101010110 IC 9 Operation mode 427 1101010110 IC 10 Operation mode 428 0011010110 IC 11 Operation mode 429 1011010110 IC 12 Operation mode 430 0111010110 IC 13 Operation mode 431 1111010110 IC 14 Operation mode 432 0000110110 IC 15 Operation mode 433 1000110110 IC 16 Operation mode 434 0100110110 435 1100110110 00 OFF 01 Fa...

Page 174: ...C 9 Filter 459 1101001110 IC 10 Filter 460 0011001110 IC 11 Filter 461 1011001110 IC 12 Filter 462 0111001110 IC 13 Filter 463 1111001110 IC 14 Filter 464 0000101110 IC 15 Filter 465 1000101110 IC 16 Filter 466 0100101110 467 1100101110 468 0010101110 469 1010101110 470 0110101110 471 1110101110 472 0001101110 473 1001101110 IC 1 Filter 00 OFF 01 Fan 02 Cooling 03 Heating 04 Dry Operation mode is ...

Page 175: ...H13 492 0011011110 BC SC16 493 1011011110 494 0111011110 BC LEV3 495 1111011110 496 0000111110 497 1000111110 498 0100111110 499 1100111110 500 0010111110 501 1010111110 502 0110111110 503 1110111110 504 0001111110 505 1001111110 506 0101111110 507 1101111110 508 0011111110 509 1011111110 510 0111111110 511 1111111110 BC TH11 BC TH12 BC TH16 BC LEV1 512 0000000001 0000 9999 99 9 999 9 513 10000000...

Page 176: ...537 1001100001 538 0101100001 539 1101100001 540 0011100001 541 1011100001 542 0111100001 543 1111100001 544 0000010001 545 1000010001 546 0100010001 547 1100010001 548 0010010001 549 1010010001 550 0110010001 551 1110010001 Error detection time 1 552 0001010001 Error detection time 1 2 553 1001010001 Error detection time 2 Current time Current date 99 9 999 9 0 255 0 9999 0 255 Hour Minute Year M...

Page 177: ...tion time 8 566 0110110001 Error detection time 8 2 567 1110110001 Error detection time 9 568 0001110001 Error detection time 9 2 569 1001110001 Error detection time 10 570 0101110001 Error detection time 10 2 Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Hour Minute Year Month Day Display alternatly Display a...

Page 178: ...indoor units and the compressor if the pressure gage for the low pressure servicing joint CJ2 reads 0 147 MPa or after running the pump down operation for 20minutes 5 Shut off the gas ball valve BV1 for the outdoor unit 6 Remove any refrigerant remaining in the extension piping and the indoor units Be sure to recover the refrigerant without releasing it into the air 7 Repair the location of the le...

Page 179: ...ion is not performed remaining refrigerant may cause the unit to malfunction 6 Remove any refrigerant remaining in the outdoor unit Reclaim the refrigerant do not discharge it into the air 7 Repair the leak point 8 After the leak point is repaired extract all of the air from the outdoor unit to create a vacuum 9 Open both ball valves BV1 and BV2 on the outdoor unit then adjust the refrigerant amou...

Page 180: ...ndoor units Reclaim the refrigerant do not discharge it into the air 2 Repair the leaks 3 After the leaks are repaired extract all of the air from the entire system to create a vacuum Then refill with refrigerant until it reaches the calculated specification outdoor unit extension piping indoor units Refer to Chapter for more details ...

Page 181: ...t block and correct any malfunc tions Note 3 Is the refrigerant composi tion of OC correct Note 2 Finished checking the composition Check that R407C is correctly charged Note 4 Recharge the refrigerant Note 5 Finished checking the composition Calibrate the refrigerant composition of OC Note 6 Are all units operating stably Note 1 CHECK THE COMPOSITION OF THE REFRIGERANT R407C unit only ª ...

Page 182: ...ctly charged in the liquid phase continue to Yes If there is a possibility that it was not charged correctly such as with a gas charger continue to No Note 5 After reclaiming the system s refrigerant extract the air to create a vacuum then refill with new refrigerant Be sure to charge in the liquid phase In addition be sure to change the dryer Note 6 After the units are operating stably check that...

Page 183: ... to change without notice Issued in January 2004 MEE03K192 Printed in Japan Service Handbook PUHY P200YEM A P250YEM A P315YEM A PUY P200YEM A P250YEM A P315YEM A PURY P200YEM A P250YEM A CMB P104 P105 P106 P108 P1010 P1013 P1016V F PUHY 200YEM A 250YEM A 315YEM A PUY 200YEM A 250YEM A 315YEM A PUHY 250YEMK A 315YEMK A PUHY 200YEMC A 250YEMC A 315YEMC A ...

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