Mitsubishi MSZ-FA25VA Manuel de service

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ····································42. PART NAMES AND FUNCTIONS······················73. SPECIFICATION····

105OUTLINES AND DIMENSIONS1069800302.5500 Bolt pitch for installation15022.3Handle550280164.599.5170.523Service panelService port285344.544400Air inAi

11WIRING DIAGRAM6SYMBOLCT,CT761,CT781C63A,C63B,C63CDB61,DB65DSA61F61F71,F801IC801IPMLEVSYMBOLL61L62,L63MCMFNR63,NR64RT61RT62RT64RT65SYMBOLR61,R831R64A

12 SYMBOLCT,CT761,CT781C63A,C63B,C63CDB61,DB65DSA61F61F71,F801,F901IC801IPM,IC932LEV SYMBOLL61L62,L63MCMFNR63,NR64RT61RT62RT64RT65 SYMBOLR61,R831R6

13MUZ-FA25VAH (Serial No : ~5000400T)MUZ-FA35VAH (Serial No : ~5000400T)SYMBOLCT,CT761,CT781C63A,C63B,C63CDB61,DB65DSA61F61F71,F801HIC801IPMLEVSYMBOLL

14MUZ-FA25VAH (Serial No : 5000401T~)MUZ-FA35VAH (Serial No : 5000401T~)SYMBOLCT,CT761,CT781C63A,C63B,C63CDB61,DB65DSA61F61F71,F801,F901HIC801IPM,IC93

15REFRIGERANT SYSTEM DIAGRAM7Unit:mmOutdoorheatexchangerFlared connectionDefrostthermistorRT61DischargetemperaturethermistorRT62Flared connectionStop

16ADDITIONAL REFRIGERANT CHARGE (R410A:g)Outdoor unit precharged14m2707m06m05m011m180Model Refrigerant piping length (one way)Calculation : Xg=30g/mo(

17PERFORMANCE CURVES8The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions.Si

18Correction of Cooling total inputInput correction factorsThe operational frequency of compressorCorrection of Cooling capacityCapacity correction fa

19(kgf/F [Gauge]) (MPa [Gauge]) 18 3215 205025603070 (%)35(˚C)0.20.40.60.81.01.257Hz24681012141.4Ambient temperature(˚C) Ambient humidity

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20MSZ-FA25VA : MUZ-FA25VA MUZ-FA25VAH21 18 2.94 1.79 0.61 476 2.81 1.72 0.61 500 2.70 1.65 0.61 524 2.60 1.59 0.61 54721 20 3.06 1.50 0.49 500 2.94 1.

2121 18 2.45 1.49 0.61 583 2.25 1.37 0.61 619 2.08 1.27 0.61 64321 20 2.58 1.26 0.49 607 2.40 1.18 0.49 637 2.23 1.09 0.49 67222 18 2.45 1.59 0.65 583

2221 18 4.11 2.39 0.58 748 3.94 2.28 0.58 785 3.78 2.19 0.58 823 3.64 2.11 0.58 86021 20 4.29 1.97 0.46 785 4.11 1.89 0.46 832 3.99 1.84 0.46 851 3.85

2321 18 3.43 1.99 0.58 916 3.15 1.83 0.58 972 2.91 1.68 0.58 101021 20 3.61 1.66 0.46 954 3.36 1.55 0.46 1000 3.12 1.43 0.46 105722 18 3.43 2.13 0.62

24PERFORMANCE DATA HEAT operationCAPACITY:3.2(kW)INPUT:735(W)OUTDOOR WB(:)INDOOR-10 -5 0 5 10 15 20DB(:)Q INPUT Q INPUT Q INPUT Q INPUT Q INPUT Q I

25ACTUATOR CONTROL9MUZ-FA25VA MUZ-FA35VAMUZ-FA25VAH MUZ-FA35VAHDischarge temperature thermistorIndoor coil temperature thermistorDefrost thermistorF

2610SERVICE FUNCTIONSCHANGE IN DEFROST SETTINGChanging defrost finish temperature<JS> When the JS wire of the outdoor Inverter P.C. board is cut

27Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

282. Flow chart of the detailed outdoor unit failure mode recall functionOperational procedureNote1. Make sure to release the failure mode recall func

293. Outdoor unit failure mode tableOFF2-time flash2.5 seconds OFF3-time flash2.5 seconds OFF4-time flash2.5 seconds OFF5-time flash2.5 seconds OFF6-t

3• The inverter P.C.board is integrated.1.Inverter P.C.board has been changed(Refer to 11-7.1. Inverter P.C.board). FUSE F901 has been equipped. Plea

30StartIndoor unit operates.Outdoor unit doesn't operate.Indoor unit doesn't receive the signal from remote controller.OPERATION INDICATORl

31ONOFF2.5-second OFF2.5-second OFFNOTE 1. The location of LED is illustrated at the right figure. Refer to 11-7.1.2. LED is lighted during normal ope

3211-5. Trouble criterion of main partsPart name FigureCheck method and criterionOutdoor fan motor(MF)R.V. coil(21S4)LEV(Expansion valve coil)Measure

33●With the connector between the compressor and the intelligent power module disconnected, activate the inverter and check if the inverter is normal

34Check of compressorDCheck of compressor windingECheck of compressor operation timeF● Disconnect the connector (CN61) between the compressor and inte

35Check of outdoor thermistorsGWhen POWER lamp flashes 6-time.The thermistors in the outdoor unit are abnormal.Check of R.V. coilHUnit operates COOL m

36Check of power supplyJInverter does not operate.Check of outdoor fan motorIOutdoor fan motor does not operate.Does the voltage betweeneach terminal

37Outdoor unit does not operate at all, or stops immediately due to overcurrent.Check of LEV (Expansion valve)Check of current-limiting resistorKLHeat

38Check of defrost heaterMReplace the inverter P.C. board.Is there 230V AC between CN722 1 and 3 on the power P.C. board? Refer to 11-7.2.YesNoNo prob

39Check of inverter P.C. boardNOutdoor fan motor does not operate, or stops immediately after starting up.Yes(10-time flash)YesCheck the LED indicatio

41TECHNICAL CHANGESRefrigerationoilRefrigerantNew refrigerantR410AHFC-32: HFC-125 (50%:50%)Pseudo-azeotropic refrigerantNot includedA1/A172.6-51.41.55

How to check mis-wiring and serial signal error (when outdoor unit does not work)O40• When unit cannot operate neither by the remote controller nor by

41Electromagnetic noise enters into TV sets or radiosPReplace or repair the antenna.Replace or repair the coaxial cable.NoNoNoYesYesNoNoYesYesYesIs th

421. Inverter P.C. boardMUZ-FA25VA (Serial No : ~5002650T) MUZ-FA35VA (Serial No : ~5003000T)MUZ-FA25VAH (Serial No : ~5000400T) MUZ-FA35VAH (

43MUZ-FA25VA (Serial No : 5002651T~) MUZ-FA35VA (Serial No : 5003001T~)MUZ-FA25VAH (Serial No : 5000401T~) MUZ-FA35VAH (Serial No : 5000401T~)

442. Power P.C. boardHeater connector(CN722) Refer to 11-6.MR.V. coil(CN721)230V AC230V ACBack side of unitMUZ-FA25VAHMUZ-FA35VAH}Front side of unitCo

4512DISASSEMBLY INSTRUCTIONSOPERATING PROCEDUREPHOTOSPhoto 11. Removing the cabinet(1) Remove the screw fixing the service panel. (See Photo 2.)(2) Pu

464. Removing the discharge temperature thermistor anddefrost thermistor (1) Remove the top panel, cabinet and service panel.(Refer to 1.)(2) Disconne

47OPERATING PROCEDUREPHOTOSPhoto 6Defrostthermistor5. Removing outdoor fan motor(1) Remove the top panel, cabinet and service panel.(Refer to 1.)(2) D

4813PARTS LIST (non-RoHS compliant)13-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS111122182013109MUZ-FA25VA MUZ-FA35VAMUZ-FA25VAH MUZ-FA35V

49E02 927 232E02 927 521E02 927 501E02 927 290E02 928 290E02 927 900E02 929 900E02 065 506E02 927 661E02 927 662E02 927 245E02 927 233E02 927 640E02 8

5-30 -20 -10 0 10 203040 50 60-0.50.00.51.01.52.02.53.03.54.0(MPa [Gauge])R410AR22Conversion chart of refrigerant temperature and pressureSaturated li

5013-2. OUTDOOR UNIT ELECTRICAL PARTS10614REACTORPOWER P.C. BOARDPOWER P.C. BOARDR.V. COILTHERMISTOR SETAMBIENT TEMPERATURE THERMISTORFUSE HOLDERFUSET

51MUZ-FA25VA MUZ-FA35VA13-3. DRAIN SOCKETSymbolin WiringDiagramQ'ty/unitMUZ-FA25VA-RemarksParts No. Parts NameE1MUZ-FA35VA-E1E02 838 7041DRAIN SO

5214RoHS PARTS LIST (RoHS compliant)14-1. OUTDOOR UNIT STRUCTURAL PARTS AND FUNCTIONAL PARTS111122182013109MUZ-FA25VA MUZ-FA35VAMUZ-FA25VAH MUZ-FA35

53E12 927 232E12 927 521E12 927 501E12 927 290E12 928 290E12 927 900E12 929 900E12 065 506E12 927 661E12 927 662E12 927 245E12 927 233E12 927 640E12 8

5414-2. OUTDOOR UNIT ELECTRICAL PARTS10614REACTORPOWER P.C. BOARDPOWER P.C. BOARDR.V. COILTHERMISTOR SETAMBIENT TEMPERATURE THERMISTORFUSE HOLDERFUSET

55MUZ-FA25VA MUZ-FA35VA14-3. DRAIN SOCKETSymbolin WiringDiagramQ'ty/unitMUZ-FA25VA-RemarksParts No. Parts NameE1MUZ-FA35VA-E1E12 838 7041GDRAIN S

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPANCCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in M

6Electronic scale for refrigerant chargingOutdoor unitRefrigerant gas cylinderoperating valveRefrigerant gas cylinderfor R410A with siphonRefrigerant

7PART NAMES AND FUNCTIONS2Air inletAir outletDrain outletPipingDrain hose(back and side)ACCESSORIES1Drain socket MUZ-FA25VA MUZ-FA25VAHMUZ-FA35VA MUZ-

8ModelItemCurrent transformer Current transformer Smoothing capacitor Diode module Fuse

9NOISE CRITERIA CURVES490807060504030201063 125 250 500 1000 2000 4000 8000NC-60NC-50NC-40NC-30NC-20NC-70OCTAVE BAND SOUND PRESSURE LEVEL, dB re 0.000