Mitsubishi Electric PUY-A12NHA4 Manuel de service

SERVICE MANUALCONTENTS1. REFERENCE MANUAL ································· 22. SAFETY PRECAUTION ································· 23. FEATURES ·····

106-3. NOISE CRITERION CURVES5ft3.3ftMICROPHONEUNITGROUND90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINU

100Request codeRequest contentDescription(Display range)Unit Remarks153154155156157158159160161162163164165166167~189190191192~7647657667670 – 99990 –

101Frequency control state DisplayDischarge temperatureCondensation temperatureAnti-freezeHeatsink temperatureoverheat preventionoverheat preventionp

102[Fan control state] (Request code : "53")Data displayFan step correction value by heatsink temperature overheat prevention controlFan ste

103[Contact demand capacity] (Request code : "61")Data display000Setting content[External input state] (Request code : "62") Data

10400 1100 1200 1300 1400 1500 1600 1700 1800 1900 1A00 1B00 1C00 1D00 1E00 1F00 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 2A00 2B00 2C00 2D00

105[Indoor unit – Model setting information] (Request code : 162)Data display00See the table on the right.Display Model setting state Display Model s

10615 DISASSEMBLY PROCEDURE 1. Removing the top panel, service panel, front panel and back panel (1) Remove the top panel fixing screws (4 × 10), o

107Electrical parts box Controller circuit board (C.B.)Electrical parts box fixing screwsTerminal block (TB1) 4. Removing the thermistor <Outdoor

108 5. Removing the thermistor <Outdoor> (TH7) (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Disco

109 9. Removing linear expansion valve (1) Remove the service panel. (See Photo 1) (2) Remove the top panel. (See Photo 1) (3) Remove the front pa

116-4. STANDARD OPERATION DATA6-4-1. Heat pumpRepresentative matchingPKA-A18HA4 PKA-A24KA4 PKA-A30KA4 PKA-A36KA4 PLA-A42BA4ModeCOOLING HEATING COOLING

110Photo 13Photo 14 Compressor (MC)Valve bedSeparatorSeparator fixing screwCompressor fixing nutsAccumulatorAccumulatorOutletInlet 12. Removing the c

111 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove

112 4. Removing the thermistor <Outdoor 2-phase pipe> (TH6) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figur

113 8. Removing the 4-way valve coil (21S4), linear expansion valve coil (LEV-A) and bypass valve coil (SV) (1) Remove the service panel. (See Figur

114 11. Removing the bypass valve (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove the electrical

115 15. Removing the compressor (MC) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 2 front cove

116 1. Removing the service panel and top panel (1) Remove 3 service panel fixing screws (5 × 12) and slide the hook on the right downward to remove

117PHOTOSPhoto 4 5. Removing the thermistor <Outdoor> (TH7) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figur

118 7. Removing the 4-way valve coil (21S4) and linear expansion valve coil (LEV-A) (1) Remove the service panel. (See Figure 1) (2) Remove the top

119PHOTOS 11. Removing the reactor (DCL) and capacitor (CE) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1)

12Representative matchingPKA-A12HA4 PKA-A18HA4 PKA-A24KA4 PKA-A30KA4 PKA-A36KA4 PLA-A42BA4ModeCOOLING COOLING COOLING COOLING COOLING COOLINGTotal Cap

12. Removing the compressor (MC) (1) Remove the service panel. (See Figure 1) (2) Remove the top panel. (See Figure 1) (3) Remove 2 front cover p

13OUTDOOR UNIT Unit: mm<inch>PUZ-A18NHA4 PUZ-A18NHA4-BS PUY-A12/18NHA4 PUY-A12/18NHA4-BSPUZ-A18NHA4R1 PUZ-A18NHA4R1-BS PUY-A12/18NHA4R1 PUY-A

14PUZ-A24/30/36NHA4 PUZ-A24/30/36NHA4-BS Unit: mm<inch>PUY-A24/30/36NHA4 PUY-A24/30/36NHA4-BSMin. 10mm <3/8>Min. 10mm<3/8&g

15PUZ-A42NHA4 PUZ-A42NHA4-BS Unit: mm<inch>PUY-A42NHA4 PUY-A42NHA4-BSMin. 1000mm<39-3/8>Min. 150mm<5-29/32>Min. 10mm<3/8

168WIRING DIAGRAMP. B.C. B.CNF1(WHT)MF1MS3~71TRANSCNDC(PNK)31TH7/6(RED)63H(YLW)TH3(WHT)TH32(BLK)TH7 TH6 TH3TH3241211231t° t° t°t°63HLEV-A(WHT)LEV-AM

17PUZ-A24NHA4 PUZ-A24NHA4-BS PUY-A24NHA4 PUY-A24NHA4-BSP. B.C. B.CNF1(WHT)MF1MS3~71TRANSCNDC(PNK)31TH7/6(RED)63H(YLW)TH3(WHT)TH32(BLK)TH

18PUZ-A30/36NHA4 PUZ-A30/36NHA4-BS PUY-A30/36NHA4 PUY-A30/36NHA4-BS+Use copper supply wires.C. B.CNF1(WHT)MF1MS3~71TRANSCNDC(PNK)321TH7/6(

19PUZ-A42NHA4 PUZ-A42NHA4-BS PUY-A42NHA4 PUY-A42NHA4-BS+Use copper supply wires.C. B.CNF1(WHT)MF1MS3~71CNF2(WHT)MF2MS3~71TRANSCNDC(PNK)321

21TECHNICAL CHANGESINDOOR UNITModel name Service Ref. Service manual No.PLA-A12/18/24/30/36/42BA4 PLA-A12/18/24/30/36/42BA4 OCH482OCB482PCA-A24/30/36/

209WIRING SPECIFICATIONS9-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)The following connection patterns are available.The o

219-2. SEPARATE INDOOR UNIT/OUTDOOR UNIT POWER SUPPLIESThe following connection patterns are available.The outdoor unit power supply patterns vary on

22+ The max. cable length may vary depending on the condition of installation, humidity or materials, etc.Indoor unit-Outdoor unitOutdoor power supply

239-4. M-NET WIRING METHOD(Points to note)(1) Outside the unit, transmission wires should stay away from electric wires in order to prevent electromag

249-4-3. Regulations in address settingsIn case of multiple grouping system, M-NET and refrigerant address settings should be done as explained in the

2510REFRIGERANT SYSTEM DIAGRAMPUZ-A24NHA4(-BS) PUZ-A30NHA4(-BS) PUZ-A36NHA4(-BS)Outdoor heat exchangerThermistor(TH3)Thermistor(TH6)DistributorService

26Outdoor heat exchangerThermistor(TH3)Thermistor(TH6)DistributorServiceport(check)AccumulatorCompressorRefrigerant GAS pipe15.88 (W5/8)Refrigerant LI

273. Start and finish of test run • Operation from the indoor unit Execute the test run using the installation manual for the indoor unit. • Operatio

2811 TROUBLESHOOTING<Error code display by self-diagnosis and actions to be taken for service (summary)>Present and past error codes are logged

29[TEST] buttonPipe (liquid) temperatureDisplays the remainingtest run time."TEST RUN" and the currently selectedoperation mode are displaye

3Cautions for units utilizing refrigerant R410A3-2. CAUTIONS RELATED TO NEW REFRIGERANTUse new refrigerant pipes.Make sure that the inside and outside

30ON/OFFTEMPFANVANEMODECHECKLOUVERTEST RUN AUTO STOP AUTO STARThminRESETSETCLOCKTESTRUNCOOL,Test run [for IR wireless remote controller]M

3111-3. HOW TO PROCEED "SELF-DIAGNOSIS"11-3-1. When a Problem Occurs During OperationIf a problem occurs in the air conditioner, the indoor

32Transmission data from remote controllerTransmission data on transmission pathWhen the number of data errors is "02": Press the ON/OFF bu

33• "CHECK" lights, and refrigerant address "00" blinks.• Check that the remote controller's display has stopped before con

34[Output pattern A] Errors detected by indoor unit[Output pattern B]E9*1 If the beeper does not sound again after the initial 2 beeps to confirm the

3511-4. SELF-DIAGNOSIS ACTION TABLE<Abnormalities detected when the power is turned on>(Note 1) Refer to indoor unit section for code P and code

36Error CodeAbnormal point and detection method Judgment and actionEb(6845)Miswiring of indoor/outdoor unit connecting wire (converse wiring or discon

37<Abnormalities detected while unit is operating>Error CodeAbnormal point and detection method Judgment and actionU1(1302)High pressure (High-p

38ThermistorsOpen detection Short detectionSymbol NameTH3TH6TH7TH8– 40[-40°F] or below– 40[-40°F] or below– 40[-40°F] or below– 27[-17°F] or below

39Error CodeAbnormal point and detection method CaseJudgment and actionU9(4220)Overvoltage or voltage shortage and synchronous signal to main circuitA

4GravimeterUnit[3] Service tools Use the below service tools as exclusive tools for R410A refrigerant.[1] Cautions for service(1) Perform service aft

40E3orE5Remote controller transmission error (E3)/signal receiving error (E5)1 Abnormal if remote controller could not find blank of transmission path

41Error CodeAbnormal point and detection method Judgment and actionE9(6841)Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit)

42<M-NET communication error>(Note) “Indoor unit” in the text indicates M-NET board in outdoor unit.Error CodeAbnormal point and detection metho

43Continued to the next page.A6(6606)Communication error with communica-tion processorDefective communication between unit processor and transmission

445. If displayed address or attribute is FRESH MASTER, Indoor unit detects abnormality when indoor unit transmitted to FRESH MASTER and there was n

4511-5. TROUBLESHOOTING OF PROBLEMSPhenomenaFactor Countermeasure1. Remote controller display does not work.2. “PLEASE WAIT” display is remained on th

46PhenomenaFactorCountermeasure7. Remote controller display works normally and the unit performs heat-ing operation, however, the capacity cannot be f

47How long is “PLEASE WAIT” kept being displayed on the remote controller?6 minutes or more2 minutes or less2 to 6 minutesNONOYESYESAre any error code

48AC 187V to AC 253V?AC 187V to AC 253V?AC 187V to AC 253V?DC 12V to DC 16V?DC 12V to DC 16V?NOYESNOYESNOYESYESNOYESNOCheck the voltage between S1 an

49AC 187V to AC 253V?Are there looseness or disconnection of the indoor/outdoor connecting wire?Is anything displayed?DC 17V to DC 28V?Is “E8” display

53-3. CAUTIONS FOR REFRIGERANT PIPING WORKNew refrigerant R410A is adopted for replacement inverter series. Although the refrigerant piping work for R

50DC 10V to DC 16V?YESNOLightingBlinkingLightingBlinkingCheck the voltage of the terminal block (TB6) of the remote controller.Check the status of the

51The operating display of remote controller does not come on.Phone Calls From Customers How to Respond Note Check if power is supplied to air co

52Phone Calls From Customers How to Respond Note Check the set temperature of remote controller. The outdoor unit cannot be operated if the set

53Air blows out for a while after HEAT operation is stopped.Phone Calls From Customers How to Respond Note This is not a malfunction. The blow

54Phone Calls From Customers How to Respond NoteThis is not a malfunction.This may occur when the operation gets started in the room of high humidity

55123456MGrayOrangeRedYellowBlack123456MParts nameCheck pointsDisconnect the connector then measure the resistance with a tester. (At the ambient temp

56Notes · High voltage is applied to the connecter (CNF1, 2) for the fan motor. Pay attention to the service. · Do not pull out the connector (CNF1, 2

57Thermistor R0 = 15k" ± 3%B constant = 3480 ± 2%t (:): Rt =15exp{3480( 273+t – 273 )}T (˚F): RT =15exp{3480( 273+(T– 32)/1.8 – 273 )}11-7. HOW T

58<Output pulse signal and the valve operation>(2) Linear expansion valve operationOpenExtra tightening (about 32 pulse)Pulse number500 pulseOpe

59<Output pulse signal and the valve operation>(2) Linear expansion valve operationOpenExtra tightening (about 32 pulse)Pulse number500 pulseOpe

64 FEATURESCHARGELESS SYSTEMPRE-CHARGED REFRIGERANT IS SUPPLIED FOR PIPING LENGTH AT SHIPMENT.(Max. 100ft, 30m (A42) / Max. 70ft, 21m (A12-36))The ref

60Main bodyLead wireStopperCoil(3) How to attach and detach the coil of linear expansion valve (A12, 18 )<Composition>Linear expansion valve is

61Main bodyLead wireStopperCoil(4) How to attach and detach the coil of linear expansion valve (A24, 30, 36, 42)<Composition>Linear expansion va

6211-8. EMERGENCY OPERATION (1) When the error codes shown below are displayed on outdoor unit or microprocessor for wired remote controller or indoor

63(5) Operation data during emergency operationDuring emergency operation, no communication is performed with the indoor unit, so the data items neede

6411-9. TEST POINT DIAGRAMOutdoor controller circuit boardPUZ-A18/24/30/36/42NHA4 PUZ-A18/24/30/36/42NHA4-BSPUY-A12/18/24/30/36/42NHA4 PUY-A12/18/24/3

65Outdoor noise filter circuit boardPUZ-A18NHA4 PUZ-A18NHA4-BSPUY-A12/18NHA4 PUY-A12/18NHA4-BSPUZ-A18NHA4R1 PUZ-A18NHA4R1-BSPUY-A12/18NHA4R1 PUY-A12/1

66LO, NOVoltage of 208/230V AC is output. (Connect ACL)CN52C52C relay signal(Connect to the outdoor controller circuit board (CN52C))CN5Primary curren

67CNAC1, CNAC2208/230V AC(Connect to the outdoor control-ler circuit board (CNAC))EIConnect to the earthLI, NIVoltage of 208/230V AC is input. (Connec

68CN2Connect to the outdoor controller circuit board (CN2)1-5: Outdoor power circuit board ➔ Transmitting signal to the outdoor controller circuit boa

69TABPConnect to the smoothing capacitor CB +(A42N only)Outdoor power circuit boardPUZ-A30/36/42NHA4PUZ-A30/36/42NHA4-BSPUY-A30/36/42NHA4PUY-A30/36/42

75 SPECIFICATIONSService Ref. PUZ-A18NHA4(R1) PUZ-A24NHA4 PUZ-A30NHA4 PUZ-A36NHA4 PUZ-A42NHA4PUZ-A18NHA4(R1)-BS PUZ-A24NHA4-BS PUZ-A30NHA4-BS PUZ-A36N

70Active filter modulePUZ-A30/36/42NHA4 PUZ-A30/36/42NHA4-BSPUY-A30/36/42NHA4 PUY-A30/36/42NHA4-BSL1, L2Connect to the DCL (Reactor)Connect to the out

71SwitchTypeofswitchDipswitchPushswitchSW112No.Function Effective timingAction by the switch operationForced defrost +1 Start NormalWhen compressor is

72123,4,563456123,4123456785ON OFFNo.Function Effective timingAction by the switch operationNo functionPower failureautomatic recovery +2No functionMo

73Special function(a) Low-level sound priority mode (Local wiring) Unit enters into Low-level sound priority mode by external signal input setting.

74<Display function of inspection for outdoor unit>The blinking patterns of both LED1 (green) and LED2 (red) indicate the types of abnormality w

75U2U1U8UFUPUHU6U3U4U5U9P1P2P9P4P5P6P8FbE1E2Indication ErrorErrorcode+1Outdoor controller boardContents Inspection methodLED1 (Green)LED2 (Red)3 blink

76<Outdoor unit operation monitor function>[When option part ‘A-Control Service Tool (PAC-SK52ST)’ is connected to outdoor controller board (CNM

77SW2 setting1ON23456Display detailExplanation for display UnitPipe temperature / Liquid (TH3) – 40~194– 40~194 (– 40~90:)(When the coil thermistor

78SW2 setting1ON23456Display detailExplanation for displayUnitPipe temperature/Liquid (TH3) on erroroccurring– 40~194– 40~194 (– 40~90:)(When the coil

79SW2 setting1ON23456Display detailExplanation for displayUnitCapacity setting displayDisplayed as an outdoor capacity codeCodedisplay1ON234561ON23456

8Service Ref.PUY-A12NHA4(R1) PUY-A18NHA4(R1) PUY-A24NHA4 PUY-A30NHA4 PUY-A36NHA4 PUY-A42NHA4PUY-A12NHA4(R1)-BS PUY-A18NHA4(R1)-BS PUY-A24NHA4-BS PUY-A

8062~86 (17~30:)˚F1ON23456˚FDischarge superheat. SHd32~360 Cooling = TH4 (or TH32)-TH6 Heating = TH4 (or TH32)-TH532~360 (0~182:)(When the tempe

81SW2 settingDisplay detailExplanation for display Unit1ON23456%Capacity save0~100When air conditioner is connected to M-NET and capacity save mode is

82SW2 settingDisplay detailExplanation for display Unit1ON23456PulseLEV-A opening pulse on error occurring0~4800~480(When it is 100 pulse or more, hun

83SW2 settingDisplay detailExplanation for display Unit˚F32~360 (0~182˚C)(When the temperature is 100˚F or more, hundreds digit, tens digit and ones

84SW2 settingDisplay detailExplanation for displayUnitControlling status of compressor operating frequency1ON23456CodedisplayThe following code will b

8512EASY MAINTENANCE FUNCTIONL Reduces maintenance work drastically.L Enables you to check operation data of the indoor and outdoor units by remote co

86Data measurementWhen the operation is stabilized, measure operation data as explained below.(4) Press the [TEMP] buttons ( and ) to select the de

8712-2.GUIDE FOR OPERATION CONDITIONInspection item ResultPower supplyLoose con-nectionBreaker Good RetightenedTerminal block Outdoor Unit Good Retigh

8813 FUNCTION SETTINGFunctionSettingsMode No.Wired remote controller(RF thermistor)Setting No. : Initial setting (when sent from the factory)RemarksP

89FunctionSettingsMode No.No.Setting: Initial setting (Factory setting)- : Not available4-WaycassetteCeilingsuspendedWall mountedPCA-KA PKA-HA(L) PKA-

9Piping Length (one way)ChargedFactoryService Ref. 50ft 60ft 70ft 80ft 90ft 100ft 110ft 120ft 130ft 140ft 150ft 160ft 165ft15m 18m 21m 24m 27m 30m 33m

90 Select mode No. 02 (room temperature detection position). Select setting No. 03 (remote controller fixed). (Use  and .) Enter the sett

91[Operating Procedure] Check the setting items provided by function selection.If settings for a mode are changed by function selection, the function

92ON/OFFTEMPFANVANEMODECHECKLOUVERTEST RUN AUTO STOP AUTO STARThminCHECKRESETSETCLOCKThe flow of the function selection procedure is shown belo

9313-2. FUNCTION SELECTION OF REMOTE CONTROLLERThe setting of the following remote controller functions can be changed using the remote controller fun

94OFFno1no2OFFONOFFONOFFOFFCALL-ONOFFONOFF°C°FPAR-21MAAON/OFFFILTERCHECKOPERATIONCLEARTESTTEMP.MENUBACK DAYMONITOR/SETCLOCKON/OFFEnglishGermanSpanishR

9513-3. Function selection of IR wireless remote controllerTEMPERATURE DISPLAY °C/°F SETTING (Change of temp mode from °F to °C)1 Press the set button

9614MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER14-1. HOW TO "MONITOR THE OPERATION DATA"• Turn on the [Monitoring the operation

9714-2. REQUEST CODE LIST* Certain indoor/outdoor combinations do not have the request code function; therefore, no request codes are displayed.Reques

98Request codeRequest contentDescription(Display range)Unit Remarks50515253545556575859606162636465666768697071727374757677787980818283848586878889909

99Request codeRequest contentDescription(Display range)Unit Remarks10310410510610710810911011111211311411511611711811912012112212312412512612712812913