Mitsubishi Electric MXZ-5B42NA Wartungshandbuch

ModelsSERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 22. PART NAMES AND FUNCTIONS ····················· 33. SPECIFICAT

10CoolingHighFUNCTIONFAN SPEEDHeatingHigh58SPL(dB(A))58LINE90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTI

MXZ-3B30NA MXZ-3B30NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN

MXZ-3B30NA MXZ-3B30NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN

MXZ-3B30NA MXZ-3B30NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN

MXZ-3B30NA MXZ-3B30NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN

MXZ-3B30NA MXZ-3B30NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN

MXZ-4B36NA COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

11OUTLINES AND DIMENSIONS5MXZ-2B20NALock nutConnectorGrounding terminalConduitcoverAir inAir outNote : Leave front and both sides free of ob

MXZ-4B36NA HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV& 6QV

MXZ-4B36NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

12MXZ-3B24NAMXZ-3B30NAUnit: inchABC15/16"7/16"5/8"5/8"1-1/16"1-9/16"14"15-1/4"10-5/8"9-27/32"1-3/8&q

MXZ-4B36NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-4B36NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP #$%&7PKV# 7PKV$ 7PKV% 7PKV&6QVC

MXZ-5B42NA COOLINGCurrent (A) Current (A)6500 880(5200-6500) (860-880)9000 910(7200-9000) (890-910)8800 930(7200-9000) (890-930)12000 970(7200-12000)

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

13MXZ-4B36NAABCD15/16"7/16"5/8"5/8"1-1/16"1-9/16"14"15-1/4"10-5/8"9-27/32"1-3/8"19-11/16"

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

MXZ-5B42NA COOLINGCurrent (A) Current (A)Indoor unitscombinationUnit A Unit B Unit CUnit A Unit B Unit C Unit D 230VUnit D Unit EUnit EOutdoor unitpow

14MXZ-5B42NAUnit: inchHandle13-3/8”21-9/16”42-1/8”HandleLIQGASLIQGASLIQGASLIQGASLIQGASUnit EUnit DUnit CUnit BUnit ALIQ 1/4” FLAREGAS 3/8” FLA

MXZ-5B42NA HEATINGCurrent (A) Current (A)7800 880(6800-14400) (860-1210)10900 970(8600-15400) (940-1340)10500 1030(8600-15400) (940-1340)14400 1230(86

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

15WIRING DIAGRAM6MXZ-2B20NAMXZ-2B20NA -1OBH560H

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

MXZ-5B42NA HEATINGCurrent (A) Current (A)Powerfactor (%)Indoor type Heating Capacity (BTU/h)TotalUnit EOutdoor unitpower consumpution (W)208V 230VUnit

16MXZ-3B24NAMXZ-3B30NAMXZ-4B36NAOBH560H

17MXZ-3B24NA -1MXZ-3B30NA -1MXZ-4B36NA -1OBH560H

18MXZ-5B42NAOBH560H

19Stop valve withservice portStop valveStrainer#100PowerreceiverLEV ALEV BOil separatorCompressorDefrostthermistorRT61DistributorMufflerLEV EIndoor un

TECHNICAL CHANGES21Revision B:• MXZ-3B24NA and MXZ-4B36NA have been added.MXZ-2B20NANew modelMXZ-2B20NA MXZ-2B20NA -11. Outdoor fan motor has been

20 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below. When the

21Stop valve (with service port)Stop valvePowerreceiverLEV ALEV BLEV COil separatorCompressorMuffler4-way valveLEV FIndoor unitCIndoor unitBIndoor uni

22 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below. When the

23Stop valve (with service port)Stop valvePowerreceiverLEV ALEV BLEV COil separatorCompressorMuffler4-way valveLEV FIndoor unitCIndoor unitBIndoor uni

24 Refrigerant pipe diameter is different according to indoor unit to be connected. When using extension pipes, refer to the tables below. When the

25Indoor unitEStop valve (with service port)Stop valveAccumulatorLEV ALEV BLEV CLEV DOil separatorCompressorMuffler4-way valveSolenoidvalveLEV FIndoor

26abcdOutdoorunitIndoorunits49ft.33ft.49ft.eMax.Heightdifference Refrigerant pipe diameter is different according to indoor unit to be connected. When

27When relocating or disposing of the air conditioner, pump down the system following the procedure below so that no refriger-ant is released into the

28DATA8ModelMXZ-2B20NAIndoor type Non-Duct (09+09) Duct (09+12)Item Unit Cooling Heating Cooling HeatingTotalCapacity Btu/h 18,000 22,000 20,000 22,00

29ModelMXZ-4B36NAIndoor type Non-Duct (09+09+09+09) Duct (09+09+09+09)Item Unit Cooling Heating Cooling HeatingTotalCapacity Btu/h 35,400 36,000 34,40

3PART NAMES AND FUNCTIONS2MXZ-2B20NAAir outletDrain outletAir inlet(Back and side)MXZ-3B24NA MXZ-3B30NA MXZ-4B36NAAir outletDrain outletAir inlet(Ba

30ModelMXZ-5B42NAIndoor type Non-Duct (06+09+09+09+09) Duct (09+09+09+09+09)Item Unit Cooling Heating Cooling HeatingTotalCapacity Btu/h 40,800 45,200

31(2) OPERATION FunctionCoolingHeating"A" Cooling steady stateat rated compressor speed "B-2" Cooling steady state at rated compre

32MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA MXZ-5B42NAThe standard specifications apply only to the operation of the air conditioner under norma

3309 class(47Hz)12 class(59Hz)15 class(78Hz)Indoor unit class(Inverter output frequency)Indoor air Dry-bulb temperaturedifference (degree)22.120.518.7

3406 class(15Hz)*24 class(56Hz)18 class(49Hz)15 class(33Hz)12 class(29Hz)Indoor unit class(Inverter output frequency)Indoor air Wet-bulb temperaturedi

35MXZ-5B42NA06 class(18Hz)24 class(44Hz)18 class(39Hz)15 class(34Hz)12 class(30Hz)Indoor unit class(Inverter output frequency)Indoor air Wet-bulb temp

360 50 1000.51.01.52.00 50 1000.51.01.52.00501000.51.01.52.00501000.51.01.52.00 50 1000.51.01.52.00501000.51.01.52.00501000.51.01.52.00 50 1000.51.01.

37 (OUTDOOR UNIT: MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)0501000.51.01.52.00 50 1000.51.01.52.00501000.51.01.52.00 50 1000.51.01.52.00501000.51.01.52.00

38 (OUTDOOR UNIT: MXZ-5B42NA)<COOL>CapacityFrequencyHz<COOL>Total inputFrequencyHz<HEAT>CapacityFrequencyHz<COOL>CapacityFreq

398-4. OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT1. 06-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA)(1) COOL operation Data is based on

4SPECIFICATION3ItemOutdoor modelIndoor type Non-Duct (09+09) Duct (09+12)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal finishPower supplyMax.

402. 09-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA)(1) COOL operation Data is based on the condition of indoor humidity 50% Air flow sp

413. 12-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA)(1) COOL operation65 70 75 80 85 90 95 100 105 110 115120140150160170130Ambient tempe

424. 15-class unit in single operation (OUTDOOR UNIT: MXZ-2B20NA)(1) COOL operation65 70 75 80 85 90 95 100 105 110 115120130140150160170Ambient tempe

435. 06-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)(1) COOL operationData is based on the condition of indoor

446. 09-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)(1) COOL operationData is based on the condition of indoor

457. 12-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)(1) COOL operation65 70 75 80 85 90 95 100 105 110 115110120

468. 15-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)(1) COOL operation65 70 75 80 85 90 95 100 105 110 115120130

479. 18-class unit in single operation (OUTDOOR UNIT : MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA)(1) COOL operation(2) HEAT operation65 70 75 80 85 90 95 100

4810. 24-class unit in single operation (OUTDOOR UNIT : MXZ-4B36NA)(1) COOL operation65 70 75 80 85 90 95 100 105 110 115130140150160170180Ambient tem

4911. 06-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

5ItemOutdoor modelIndoor type Non-Duct (06+06+09)MXZ-3B24NAMXZ-3B24NA - 1Duct (09+09+09)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal finishP

5012. 09-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

5113. 12-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

5214. 15-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

5315. 18-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

5416. 24-class unit in single operation (OUTDOOR UNIT : MXZ-5B42NA)(1) COOL operationData is based on the condition of indoor humidity 50%Air flow

55SERVICE FUNCTIONS10ACTUATOR CONTROL9Relation between main sensor and actuatorMXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA MXZ-5B42NADischarge tem

5610-2. AUTO LINE CORRECTING <MXZ-3B24NA, MXZ-3B30NA, MXZ-4B36NA, MXZ-5B42NA>Outdoor unit has an auto line correcting function which automatical

57113. Troubleshooting procedure1) Check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality. To make

58 2. Flow chart of the detailed outdoor unit failure mode recall function 2.Blinking pattern when outdoor unit is abnormal:ONOFFNo beepBeepsRepe

593. Outdoor unit failure mode table MXZ-2B/3B/4BNOTE: Blinking patterns of this mode differ from the ones of Troubleshooting check table (11-4.).

6ItemOutdoor modelIndoor type Non-Duct (09+09+12)MXZ-3B30NAMXZ-3B30NA - 1Duct (09+09+12)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal finishP

60MXZ-5BThe left lamp of OPERATION IN-DICATOR lamp (Indoor unit)Abnormal point(Failure mode/protection)LED indication(Outdoor P.C. board)Condition Re

61MXZ-5BUpper or left lamp of OPERATION INDICATOR lamp (Indoor unit)Abnormal point(Failure mode/protection)LED indication(Outdoor P.C. board)Condition

6211-4. TROUBLESHOOTING CHECK TABLE MXZ-2B/3B/4BLED2LED1Outdoor electronic control P.C. board (Parts side)LightedLED1LED2LightedLED1(Red) LED2(Yellow)

63Primary current protectionSecondary current protectionHigh-pressure protectionDefrosting in cooling3 timesLightedDischarge temperatureprotection• Ch

64MXZ-5BNo. SymptomIndicationAbnormal point / ConditionCondition RemedyLED1(Red) LED2(Yellow)1Outdoor unit doesnot operate.Lighted OnceLEV and drain p

65The flashing frequency shows the number of times the LED blinks after every 2.5-second OFF.(Example) When the flashing frequency is “2”.ONOFF2.5-sec

6611-5. TROUBLE CRITERION OF MAIN PARTS MXZ-2B20NA MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA MXZ-5B42NADischarge temperaturethermistor (RT62)Measure the re

67 Check of power supplyOutdoor unit does not operate. Turn ON the power supply.NoYesYesNoYesNoYesNoReplace the power board.Check the main power sup

68Is there rated voltage in the power supply ?Is there any mis-wiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire ? 1

69 Check of R.V. coilNoYesNoYesNoYesNoYesNoYes1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning ON the power supply,

7ItemOutdoor modelIndoor typeNon-Duct (09+09+09+09)MXZ-4B36NAMXZ-4B36NA - 1Duct (09+09+09+09)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal fi

70NoYesNoYesNoYesNoYes1. Disconnect the lead wire leading to the compressor.2. 3 minutes after turning ON the power supply, start EMERGENCY OPERATIO

71 Check of LEVNoYesNoYesTurn ON the power supply to the outdoor unit after checking LEV coil is mounted to the LEV body securely.Is "click - c

72 How to check inverter/compressor• When heating, room does not get warm.• When cooling, room does not get cool.NoNoYesYesYesNoYesNoDisconnect the

73 Check of outdoor thermistors• When thermistor is abnormal. ThermistorDefrostDischarge temperatureOutdoor heat exchanger temperature Ambient tempe

74NoYesNoYesNoYesNoYesNoYesDisconnect CN931 and measure the resistance of the outdoor fan motor.Is the resistance of outdoor fan motor normal? (Refer

75 The other casesIndoor unit does not operate. (different operating models in multi system)• When you try to run two indoor units simultaneously,

767006005004003002001000Resistance (kΩ)Temperature (°F)Discharge temperature thermistor (RT62)3250 68 86 104 122 140 158 176 194 212 230 248-4 14 32 5

77MXZ-3B24NA MXZ-3B30NA MXZ-4B36NALED 1LED 2F931FUSET3.15AL250V(CN93220-90 V ACGND5 V DC5 V DCpulse wave(To fanmotor(+)(–)Rush current relay (–)R.V.

78CN931 to fan moterCN801 to outdoor power P.C. board 325 - 350V DC InputF930 FUSET3.15AL250VF801 FUSET3.15AL250VSW1SW2SW871LED 3LED 2LED 1CN681High p

793. Noise filter P.C. board208/230 V ACOutputF64 FUSET2AL250V{{CN901To electroniccontrol P.C. boardCN912R.V. coil208/230 V AC{CN902To powerboardCN903

8ItemOutdoor modelIndoor typeNon-Duct (06+09+09+09+09) Duct (09+09+09+09+09)CapacityPowerconsumptionEERSEERHSPF IV (V)COPExternal finishPower supplyMa

80MXZ-2B20NA4. Power board(Red)(White)Connect to the compressorVoltage among phases: 5 V to 180 VConnect to the earthCN5Primary current detection(Conn

81MXZ-3B24NA MXZ-3B30NA MXZ-4B36NA(Red)(White)Connect to the compressorVoltage among phases: 5 V to 180 VConnect to the earthCN5Primary current dete

82MXZ-5B42NAFUSE(F65N)T6.3AL250VCN912208/230V ACOutputCN61208/230V ACOutputFUSE(F65L)T6.3AL250VCN911To outdoor control P.C. board 12V DCX64BX64A)CN2To

83OPERATING PROCEDUREPHOTOSDISASSEMBLY INSTRUCTIONS12(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this c

84OPERATING PROCEDUREPHOTOS3. Removing the fan motor(1) Remove the top panel, the service panel, and the cabinet (Photo 1, 2).(2) Disconnect the con

85OPERATING PROCEDURE PHOTOS6. Removing the reactor(1) Remove the top panel (Photo 1).(2) Remove the service panel, cabinet, back panel, and the

86OPERATING PROCEDUREPHOTOS1. Removing the compressor(1) Remove the screws of the top panel, and remove the top panel.(2) Remove the screws of the ser

87OPERATING PROCEDUREPHOTOS3. Removing the 4-way valve(1) Remove the top panel (Photo 1, 2).(2) Remove the service panel, rear panel, and pipe cover

88OPERATING PROCEDURE PHOTOS5. Removing the reactor(1) Remove the top panel (Photo 1, 2).(2) Disconnect the reactor lead wire.(3) Remove the screws of

8912-3. MXZ-5B42NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the panels(1) Remove the screws of the service

990807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20NC-70OCTAVE BAND SOUND

90OPERATING PROCEDURE PHOTOS2. Removing the outdoor control P.C. board, the reac-tor and the outdoor power P.C. board(1) Remove the service panel and

91OPERATING PROCEDURE PHOTOS3. Removing the fan motor(1) Remove the top panel, the service panel, and the front panel (Photo 1).(2) Disconnect the con

OPERATING PROCEDURE PHOTOS5. Removing the expansion valve(1) Remove the top panel (Photo 1).(2) Remove the service panel (Photo 1). (Gas recovery is

MXZ-2B20NA MXZ-2B20NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $7PKV# 7PKV$ 6QVCN 98 

MXZ-2B20NA MXZ-2B20NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG*GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $7PKV# 7PKV$ 6QVCN 98 

MXZ-3B24NA MXZ-3B24NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP # $ % 7PKV# 7PKV$ 7PKV% 6QV

MXZ-3B24NA MXZ-3B24NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG %QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP # $ % 7PKV# 7PKV$ 7PKV% 6QV

MXZ-3B24NA MXZ-3B24NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP # $ % 7PKV# 7PKV$ 7PKV% 6QV

MXZ-3B24NA MXZ-3B24NA-1 HEATING+PFQQTWPKVU +PFQQTV[RG *GCVKPIECRCEKV[$67J 2QYGTEQPUWORVKQP %WTTGPV#EQODKPCVKQP # $ % 7PKV# 7PKV$ 7PKV% 6QV

MXZ-3B30NA MXZ-3B30NA-1 COOLING+PFQQTWPKVU +PFQQTV[RG%QQNKPIECRCEKV[$67J 2QYGTEQPUWORVKQP%WTTGPV#EQODKPCVKQP # $ %7PKV# 7PKV$ 7PKV% 6QVCN