Mitsubishi Electric MUZ-FD25VAH-E1 Manual de servicio

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 32. PART NAMES AND FUNCTIONS ····················· 43. SPECIFICATION ··

10MUZ-FD50VABHMitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oywww.ilmalämpöpumput.com

11Unit : mmMUZ-FD25VABH MUZ-FD35VABHOutdoorheatexchangerFlared connectionDefrostthermistorRT61DischargetemperaturethermistorRT62Flared connectionStop

12ADDITIONAL REFRIGERANT CHARGE (R410A : g)ModelOutdoor unitprechargedRefrigerant piping length (one way)5 m 6 m 7 m 8 m 9 m 10 m 11 m 12 m 13 m 14 m

13The standard specifications apply only to the operation of the air conditioner under normal conditions. Since operating condi-tions vary according t

NOTE : The above broken lines are for the heating operation without any frost and defrost operation.140.80.91.01.11.21.3-10-5 0 5 1015202530354045Outd

15Correction of Cooling inputInput correction factorsThe operational frequency of compressorCorrection of Cooling capacityCapacity correction factorsT

16COOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Operation : TEST RUN OPERATION (Refer to 8-3.)8-4. OU

17PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD25VABHCAPACITY : 2.5 kW SHF : 0.85 INPUT : 485 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C)

18PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD25VABHCAPACITY : 2.5 kW SHF : 0.85 INPUT : 485 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C)

19PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD35VABHCAPACITY : 3.5 kW SHF : 0.85 INPUT : 835 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C)

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20PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD35VABHCAPACITY : 3.5 kW SHF : 0.85 INPUT : 835 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C)

21PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD50VABHCAPACITY : 5.0 kW SHF : 0.77 INPUT : 1510 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C

22PERFORMANCE DATA COOL operation at Rated frequencyMUZ-FD50VABHCAPACITY : 5.0 kW SHF : 0.77 INPUT : 1510 WINDOORDB (°C)INDOORWB (°C)OUTDOOR DB (°C

23PERFORMANCE DATA HEAT operation at Rated frequencyMUZ-FD25VABHCAPACITY : 3.2 kW INPUT : 600 WINDOORDB (°C)OUTDOOR WB (°C)-10 -5 0 5 10 15 20Q INPU

24MUZ-FD25VABH MUZ-FD35VABH MUZ-FD50VABH9-2. R.V. COIL CONTROLHeating . . . . . . . . . . . . . . . . . ON Cooling . . . . . . . . . . . . . . . . .

2510MUZ-FD50Sensor PurposeActuatorCompressorLEVOutdoor fan motorR.V.coilIndoor fan motorDefrost heaterDischarge temperature thermistorProtectionIndo

2611-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoor/outdoor connect

272711-2. FAILURE MODE RECALL FUNCTIONOutline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even tho

2828 2. Flow chart of the detailed outdoor unit failure mode recall function 2.Blinking pattern when outdoor unit is abnormal:ONOFFNo beepBeepsRe

29293. Outdoor unit failure mode tableMUZ-FD25/35POWER lamp(Indoor unit) Abnormal point (Failure mode / protection) LED indication(Outdoor P.C. board)

3TECHNICAL CHANGES1MUZ-FD25VABH - E1MUZ-FD35VABH - E1MUZ-FD50VABH - E1 1. New modelMitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu Ref

30MUZ-FD50POWER lamp(Indoor unit)Abnormal point(Failure mode / protection)LED indication(Outdoor P.C. board) Condition CorrespondenceIndoor/outdoor un

3111-3. TROUBLESHOOTING CHECK TABLEMUZ-FD25/35No. Symptom LED indication Abnormal point/ Condition Condition Correspondence 1Outdoor unit does not op

32ONOFF2.5-second OFF2.5-second OFF0.5-second ON0.5-second ONMUZ-FD50No. SymptomLED indicationAbnormal point/ Con-dition Condition CorrespondenceLED1(

33No. SymptomLED indicationAbnormal point/ Con-dition Condition CorrespondenceLED1(Red)LED2(Yellow)20Outdoor unit operates.OnceLightingPrimary current

3411-4. TROUBLE CRITERION OF MAIN PARTSMUZ-FD25VABH MUZ-FD35VABHPart name Check method and criterion FigureDefrost thermistor (RT61) Ambient temper

35MUZ-FD50VABHPart name Check method and criterion FigureDefrost thermistor (RT61)Fin temperature thermistor (RT64)Ambient temperature ther-mistor (

363611-5. TROUBLESHOOTING FLOWAre the voltages balanced?Disconnect the connector (CN61) between compressor and the intelligent power module (IPM).Repl

37Turn OFF power supply of indoor and outdoor unit, and measure the compressor winding resistance between the compressor terminals. Is the resistance

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

39 F Check of compressor start failure D Check of compressor winding E Check of compressor operation timeDisconnect the connector (CN61) between t

4Air outletDrain outletPipingDrain hoseAir inlet(back and side)MUZ-FD25VABH MUZ-FD35VABHMUZ-FD50VABHPipingAir outletAir inlet(back and side)Drain hos

40 G Check of outdoor thermistors H Check of R.V. coil First of all, measure the resistance of R.V. coil to check if the coil is defective. Refer to

41MUZ-FD50Heating operation does not work.•Is there voltage of 230 VAC between pin1 and pin 2 at connector CN912? YesNoDisconnect the lead wire leadin

42 I Check of outdoor fan motorIs the resistance of outdoor fan motor normal?(Refer to 11-4.)Replace the outdoor fan motor.Replace the inverter P.C.

43 J Check of power supplyIs there voltage 230 VAC between the indoor terminal block S1 and S2?NoYesReplace the indoor electronic control P.C. board.

44Measure each voltage between connector pins of CN724 on the inverter P.C. board or CN795 on the outdoor electronic control P.C. board.1. Pin (-) — P

45Check the outdoor fan motor. (Refer to 11-5. .)Is the fuse (F901) blown on the in-verter P.C. board?Check the connection of the connectors (CN932) o

46Turn OFF the power supply.Is there rated voltage in the power supply?YesNoTurn ON the power supply.Check the power supply.Is there rated voltage bet

47 N Electromagnetic noise enters into TV sets or radiosYesIs the unit earthed?NoEarth the unit.YesIs the distance between the antennas and the indoo

48 O Check of defrost heaterCheck the following points before checking electric continuity.1. Does the resistance of ambient temperature thermistor h

49-20 -10 0 10 20 30 400102030405060708090100Temperature(°C)Defrost thermistor(RT61)Ambient temperature thermistor(RT65)Outdoor heat exchanger tempera

5SPECIFICATION3Outdoor model MUZ-FD25VABH MUZ-FD35VABH MUZ-FD50VABHPower supply Single phase, 230 V, 50 HzCapacity Rated frequency (Min.-Max.)Coolin

502. Outdoor electronic control P.C. boardMUZ-FD50VABH-20-100 1020304010090807060504030201000 1020304050607080200180160140120100806040200Resistance (k

51MUZ-FD50VABH3. Noise filter P.C. boardMUZ-FD50VABH4. Outdoor power board325-370 VDCOutput(Red)(White)Connect to the compressorVoltage among phases:

52MUZ-FD50VABH5. Relay P.C. boardCN722Connect to the heater230 VAC outputCN71230 VAC inputCN721To electronic control P.C. board12 VDCMitsubishi ilmalä

5312-1. MUZ-FD25VABH MUZ-FD35VABHNOTE : Turn OFF power supply before disassembling.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the sc

54OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

55OPERATING PROCEDUREPHOTOS5. Removing outdoor fan motor(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the connectors for outdoor fan

5612-2. MUZ-FD50VABHNOTE : Turn OFF power supply before disassembling.OPERATING PROCEDUREPHOTOS1. Removing the cabinet(1) Remove the screws of the s

57OPERATING PROCEDURE PHOTOS2. Removing the inverter assembly, outdoor electric control P.C. board, power board, noise filter P.C. board and reactor.(

58OPERATING PROCEDURE PHOTOS3. Removing the defrost thermistor, discharge tempera-ture thermistor, outdoor heat exchanger temperature thermistor and a

59OPERATING PROCEDURE PHOTOS5. Removing the compressor and 4-way valve(1) Remove the top panel, cabinet and service panel. (Refer to 1.)(2) Remove the

66Specifi cations and rating conditions of main electric partsModel Item MUZ-FD25VABH MUZ-FD35VABHCurrent transformer(CT) 20 A(CT761, CT781) 15 ASmooth

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2008 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Ju

790807060504030201063 125 250 500 1000 2000 4000 8000NC-60NC-50NC-40NC-30NC-20NC-70OCTAVE BAND SOUND PRESSURE LEVEL, 0dB re 0.0002 MICRO BARBAND CENTE

8MUZ-FD50VABHUnit : mmMUZ-FD25VABH MUZ-FD35VABH1069800302.5500 Bolt pitch for installation15022.3Handle550280164.599.5170.523Service panelService por

9WIRING DIAGRAM6MUZ-FD25VABHMUZ-FD35VABHMitsubishi ilmalämpöpumput huoltaa ja korjaa: Jäähdytinpalvelu RefGroup Oywww.ilmalämpöpumput.com