Mitsubishi Electric MUH-GA25VB Manual de servicio

CONTENTS1. TECHNICAL CHANGES ...22. PART NAMES AND FUNCTIONS ...33. SPECIFICATION ...

10MSC-GA20VBMUH-GA20VBMUH-GA35VBMSC-GA35VBMUH-GA25VBMSC-GA25VB8.57.87.16.45.85.110.09.28.37.56.86.011.010.09.18.27.46.520.018.516.915.413.912.310.89.2

118-2.OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENTCOOL operation Both indoor and outdoor unit are under the same temperature/humidity condition. Air

12HEAT operationCondition indoor:Dry bulb temperature 20.0°C Wet bulb temperature 14.5°COutdoor:Dry bulb temperature 7,15,20°C Wet bulb temperature

13MSC-GA20VB : MUH-GA20VB PERFORMANCE DATACOOL operation (230V)21 18 2.70 1.51 0.56 572 2.59 1.45 0.56 601 2.48 1.39 0.56 629 2.39 1.34 0.56 65821

14MSC-GA20VB : MUH-GA20VB PERFORMANCE DATACOOL operation (230V)21 18 2.25 1.26 0.56 701 2.07 1.16 0.56 744 1.99 1.11 0.56 75821 20 2.37 1.04 0.4

15MSC-GA25VB : MUH-GA25VB PERFORMANCE DATACOOL operation (230V)21 18 3.11 1.62 0.52 656 2.98 1.55 0.52 689 2.86 1.49 0.52 722 2.76 1.43 0.52 754

16MSC-GA25VB : MUH-GA25VB PERFORMANCE DATACOOL operation (230V)21 18 2.60 1.35 0.52 804 2.39 1.24 0.52 853 2.29 1.19 0.52 86921 20 2.73 1.09 0.4

17MSC-GA35VB : MUH-GA35VB PERFORMANCE DATACOOL operation (230V)21 18 4.11 1.97 0.48 872 3.94 1.89 0.48 916 3.78 1.81 0.48 959 3.64 1.75 0.48 100

18MSC-GA35VB : MUH-GA35VB PERFORMANCE DATACOOL operation (230V)21 18 3.43 1.65 0.48 1068 3.15 1.51 0.48 1134 3.03 1.45 0.48 115521 20 3.61 1.30

19MSC-GA20VB : MUH-GA20VB PERFORMANCE DATAHEAT operation (230V)MSC-GA25VB : MUH-GA25VB OUTDOOR WB(°C)INDOOR-10-5 0 5 101520DB(°C)Q INPUT

2TECHNICAL CHANGES1MUH-A07YV-E1 MUH-GA20VB-E11. Indication of capacity has been changed. (BTU base kw)2. Dimension of outdoor unit has been changed

20TROUBLESHOOTING113. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate a

2111-2. INSTRUCTION OF TROUBLESHOOTINGStartIndoor unit operates.Outdoor unit doesn'toperate.Indoor unit doesn't receive the signal from rem

22 Check of outdoor unitCompressor and/or outdoor fan motor doesn’t operate.YesCompressordoesn't operate.YesYesIs there 230 V AC between 3 on t

23 Check of outdoor unitDoes compressor stop?NoYesIs there 230 V AC between 3 on thecompressor contactor (52C) and on the outdoor terminal block

24 How to check mis-wiring and serial signal errorSerial signal error is indicated.(0.5-sec. ON, 0.5-sec. OFF)1. Turn OFF the power supply(indoor/ou

25 Check of outdoor thermistorMeasureresistancebetween CN 661 and .NoYesReplace the thermistor.Defrost thermistor (RT61)Reconnect CN661.Turn ON

26MUH-GA20VB MUH-GA25VBMUH-GA35VB Outdoor deicer P.C. boardCN711Outdoor fan motor 230 V AC CN721R.V. coil230 V ACF61FuseT2AL250V}}CN661 -Defrost the

27DISASSEMBLY INSTRUCTIONS12MUH-GA20VB MUH-GA25VB MUH-GA35VB OUTDOOR UNITOPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of

283. Removing the propeller and the outdoor fan motor(1) Remove the cabinet. (Refer to 1.)(2) Remove the propeller nut.(3) Remove the propeller.NOTE:

29OPERATING PROCEDURE PHOTOS4. Removing the compressor(1) Remove the cabinet. (Refer to 1.)(2) Remove the relay panel.(3) Remove the soundproof felt.(

3PART NAMES AND FUNCTIONS2( )Air inletAir outletDrain outletPipingDrain hoseback : MUH-GA20VBback and side : MUH-GA2

30PARTS LIST (non-RoHS compliant)132235221115MUH-GA20VB MUH-GA25VB MUH-GA35VB 417 14192018136 78910 11121623This figure shows MUH-GA20VB.2413

31Part numbers that are circled are not shown in the illustration.123456789101112131415161718192021222324E02 904 630E02 905 630E02 906 630E02 9

32RoHS PARTS LIST (RoHS compliant)142235221115417 14192018136 78910 11121623This figure shows MUH-GA20VB.24MUH-GA20VB MUH-GA25VB MUH-GA35VB 14

331234567891011121314151617181920212223242526272829E12 904 630E12 905 630E12 906 630E12 A86 630E12 904 301E12 905 301E12 899 232E12 903

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© Copyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Apr. 2008. No.OB387 REVISED EDITION-C 6Distributed in May 2007. No.OB387 REVISE

4CapacityDehumidificationOutdoor air flow Breaker capacityRunning current Power input Auxiliary heater Power factor Starting current Compressor motor

5NOISE CRITERIA CURVES490807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20N

6OUTLINES AND DIMENSIONS51069800302.5500 Bolt pitch for installation15022.3Handle550280164.599.5170.523Service panelService port285344.544400Air inAir

7WIRING DIAGRAM6SYMBOLT61TB1,TB221S452CSYMBOLMFNR61RT61SR61,SR62SYMBOLC1C65DSARF61MCNAMENAME NAMECOMPRESSOR CAPACITOROUTDOOR FAN CAPACITORSURGE ABSORB

8REFRIGERANT SYSTEM DIAGRAM7OUTDOOR UNIT(with heat insulator)Refrigerant pipe ø 9.524-way valveDefrostthermistorRT61MufflerOutdoorheatexchangerCapilla

9The standard specifications apply only to the operation of the air conditioner under normal conditions, since operating condi-tions vary according to