Mitsubishi Electric PCA-A24KA4 Manuale di Servizio

SERVICE MANUALSPLIT-TYPE, HEAT PUMP AIR CONDITIONERSSPLIT-TYPE, AIR CONDITIONERSNo. OCH484INDOOR UNIT CONTENTS 1. REFERENCE MANUAL...

1010OUTLINES AND DIMENTIONS6PCA-A24KA4 PCA-A30KA4 Unit: inch (mm)When drain socket is installed9-3/16(233)DrainageWhen drain socket is installed9-11/

1111PCA-A36KA4 PCA-A42KA4 Unit: inch (mm)When drain socket is installed9-3/16(233)When drain socket is installedDrainage9-11/16(246)14NOTES.1

12WIRING DIAGRAM7PCA-A24KA4 PCA-A30KA4 PCA-A36KA4 PCA-A42KA4INDOOR/OUTDOORCOMMUNICATIONCN3C(BLU)<Table 2> SW2 (CAPACITY CODE)S

13Pipe temperature thermistor/liquid(TH2)Distributorwith strainer 1/2#50/#50Condenser/evaporatortemperature thermistor(TH5)Room temperature thermistor

1414<Error code display by self-diagnosis and actions to be taken for service (summary)>Present and past error codes are logged and displayed on

1515[Procedure]1. Press the CHECK button twice.2. Press the temperature buttons.3. Point the remote controller at the sensor on the indoor unit and

16[Output pattern A] Errors detected by indoor unit[Output pattern B]E9*1 If the beeper does not sound again after the initial2 beeps to confirm the s

17•If the unit cannot be operated properly after the test run, refer to the following table to find out the cause.SymptomCauseWired remote controller

189-3. SELF-DIAGNOSIS ACTION TABLENote: Refer to the manual of outdoor unit for the details of display such as F, U, and other E.Error CodeAbn

19Error CodeAbnormal point and detection methodCauseCountermeasureP6Freezing/overheating protection isopeartingFreezing protection (Cooling mode)The u

2OUTDOOR UNIT’S SERVICE MANUALREFERENCE MANUAL1Model name Service Ref. Service Manual No.PUZ-A18/24/30/36/42NHA4 PUZ-A18/24/30/36/42NHA4OCH481OCB481PU

20Error CodeAbnormal point and detection methodCauseCountermeasureP9Pipe temperature thermistor/Condenser-Evaporator (TH5)The unit is in 3-minute resu

21E6Contact failure, short circuit or,miswiring (converse wiring) ofindoor/outdoor unit connectingwireDefective transmitting receivingcircuit of outdo

22Note: Refer to the manual of outdoor unit for the detail of remote controller.(1)Upward/downward vane performance failureThe vane is not do

239-5. EMERGENCY OPERATION9-5-1. When IR wireless remote controller fails or its battery is exhausted9-5-2. When wired remote controller or indoor uni

249-6. HOW TO CHECK THE PARTSPCA-A24KA4 PCA-A30KA4 PCA-A36KA4 PCA-A42KA4Parts name Check pointsDisconnect the connector then measure the resistance

259-6-1. Thermistor<Thermistor Characteristic graph>Room temperature thermistor (TH1)Pipe temperature thermistor/liquid (TH2)Condenser/evaporato

269-7. TEST POINT DIAGRAMIndoor controller boardPCA-A24KA4 PCA-A30KA4 PCA-A36KA4 PCA-A42KA4CN3CTransmission(Indoor/outdoor)(0~24V DC)SW2Capacity set

27SW1Setting by the dip switch and jumper wireFunctionsJumper wireModelsettingsCapacitysettingsPair numbersetting withIR wireless remotecontrollerFor

2828SPECIAL FUNCTION10Note:· When the unit is restarted to operate after turning off the power or OFF operation, the unit which was operating will sta

2929 System constraint· This function is available only in cooling mode.Ex.) Set temp. by R/C = 20:(68°F)Set point = 26:(79°F)When request code number

3SAFETY PRECAUTION2Cautions for units utilising refrigerant R410A2-2. CAUTIONS RELATED TO NEW REFRIGERANTUse new refrigerant pipes.Store the piping to

30(2) Setting method of each function by wired remote controllerB: Refrigerant addressC: Data display areaD: Request code display areaTESTCHECKFILTER

31Photo 2DISASSEMBLY PROCEDURE11PCA-A24KA4 PCA-A30KA4 PCA-A36KA4 PCA-A42KA4 Be careful when removing heavy parts.(Photo: PCA-A36KA4)OPERATING PROCEDUR

32OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS3. Removing the room temperature thermistor (TH1) (1) Remove the air intake grille. (See Figure 1,2) (2

33OPERATING PROCEDUREPHOTOS & ILLUSTRATIONSScrewsSide panel (Right)Side panel (Left)Sliding the panelto the frontFigure 36. Removing the side pa

34OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS8. Removing the under panel(1) Remove the air intake grille. (See Figure 1,2) (2) Remove the left and r

35OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS10. Removing the thermistors/Liquid pipe (TH2) and con-denser/evaporator (TH5)(1) Remove the air intake

OPERATING PROCEDUREPHOTOS & ILLUSTRATIONS13. Removing the heat exchanger (1) Remove the air intake grille. (See Figure 1, 2) (2) Remove the beam.

4[3] Service tools Use the below service tools as exclusive tools for R407C refrigerant.GravimeterUnit Indoor UnitPART NAMES AND FUNCTIONS3Air out

5°F°C°F°CERROR CODEAFTERTIMERTIME SUN MON TUE WED THU FRI SATONOFFHrAFTERFILTERFUNCTIONONLY1Hr.WEEKLYSIMPLEAUTO OFFPAR-21MAAON/OFFFILTERCHECKOPERATION

6 IR wireless remote controller (Option)ON/OFF TEMPFANVANETEST RUNAUTO STOPAUTO STARThminLOUVERMODECHECKRESETSET CLOCKMODELSELECTNOT AVAILABLESWINGC

7SPECIFICATIONS4AAkWF.L.Am3/min(CFM)Pa(mmAq)dBmm(in.)mm(in.)mm(in.)mm(in.)kg(lbs)Service Ref.Power supply(phase, cycle, voltage)Max. Fuse SizeMin.Circ

81 phase, 60Hz, 208/230V152White Munsell 6.4Y 8.9/0.4Plate fin coilSirocco fan (direct) % 40.1600.97Dry: 23-25-27-29(810-885-955-1025)Wet: 21-23-25-27

9NOISE CRITERION CURVES5NOTCHHighMedium1Medium2LowSPL(dB)40373533LINE90807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARIN