Mitsubishi Mr.Slim MSY-GE15NA Service Manual

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES ··································· 22. PART NAMES AND FUNCTIONS ····················· 33. SPECIFICATION ··

10MUZ-GE09NA MUZ-GE12NA5WIRING DIAGRAMMUY-GE09NA MUY-GE12NA

11MUZ-GE15NAMUY-GE15NA

12MUZ-GE18NAMUY-GE18NA

13MUZ-GE24NA

14MUY-GE24NA

15Unit: inchMUZ-GE09NA MUY-GE09NAOutdoorheatexchangerFlared connectionDefrostthermistorRT61(MUZ)DischargetemperaturethermistorRT62Flared connectionSt

16MUZ-GE18NA MUY-GE18NAOutdoorheatexchangerFlared connectionDefrostthermistorRT61(MUZ)DischargetemperaturethermistorRT62Flared connectionStop valve(w

17Max. Length AMax. HeightdifferenceBIndoorunitOutdoor unitMAX. REFRIGERANT PIPING LENGTH and MAX. HEIGHT DIFFERENCEModel Refrigerant pipin

18 Model Indoor air Outdoor intake air DB temperature (˚F) IWB (˚F) 75 85 95 105 115TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC TC SHC TPC MUZ-GE09NA

193) HEATING CAPACITY (MUZ)Model Indoor air Outdoor intake air WB temperature (˚F) IDB (˚F) 5 152535434555TC TPC TC TPC TC TPC TC TPC TC TPC TC TPC T

2MUZ-GE09NAMUZ-GE12NAMUZ-GE15NAMUZ-GE18NAMUZ-GE24NAMUY-GE09NAMUY-GE12NAMUY-GE15NAMUY-GE18NAMUY-GE24NA1. New model1TECHNICAL CHANGESRevision B:• Descri

20757065Indoor intake air DB temperature (°F)= 413 CFMAirflow155253545556570Outdoor intake air WB temperature (°F)0.40.60.81.01.1Total power consumpti

21This value of frequency is not the same as the actual frequency in operating. Refer to 7-5 and 7-6 for the relationships between frequency and capac

22MUZ-GE15NA MUY-GE15NA(PSIG) (PSIG)68 70 75 80 85 90 95 100105(°F)1201401601802006870 75 80 85 9095100 105(°F)280320360400440Condensing pressure8680

235 15253545556575(°F) 5 15253545556575(°F)6085110135160185210220245270295320345370Indoor DB temperature (°F)Condensing pressureOutdoor ambient temper

24MUZ-GE18NA5 15253545556575(°F)60851101351601852105 15253545556575(°F)300325350375400425450475500Indoor DB temperature (°F)Condensing pressureOutdoor

257-4. STANDARD OPERATION DATAModelMSZ-GE09NAMSY-GE09NAMSZ-GE09NAMSZ-GE12NAMSY-GE12NAMSZ-GE12NAItem Unit Cooling Heating Cooling HeatingTotalCapacity

26ModelMSZ-GE15NAMSY-GE15NAMSZ-GE15NAMSZ-GE18NAMSY-GE18NAMSZ-GE18NAItem Unit Cooling Heating Cooling HeatingTotalCapacity Btu/h 14,000 18,000 17,200 2

27ModelMSZ-GE24NAMSY-GE24NAMSZ-GE24NAItem Unit Cooling HeatingTotalCapacity Btu/h 22,500 27,600SHF - 0.75 —Input kW 1.800 2.340Rated frequency Hz 66.5

287-5. CAPACITY AND INPUT CORRECTION BY INVERTER OUTPUT FREQUENCYCapacity correction factorsInput correction factorsInput correction factorsCapacity c

297-6. HOW TO OPERATE FIXED-FREQUENCY OPERATION (Test run operation) 1. Press EMERGENCY OPERATION switch to start COOL or HEAT mode (COOL: Press once,

3MUZ-GE09NA MUZ-GE12NA MUZ-GE15NAMUY-GE09NA MUY-GE12NA MUY-GE15NAAir outletDrain outletPipingDrain hoseAir inlet(back and side)MUZ-GE18NA MUY-GE1

30MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NAMUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-GE24NA8-2. R.V. COIL CONTROL (MUZ)Heat

319-1. CHANGE IN DEFROST SETTING (MUZ) Changing defrost finish temperature <JS> To change the defrost finish temperature, cut/solder the JS wi

32Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

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

34 3. Outdoor unit failure mode tableOPERATION INDICATORupper lamp(Indoor unit) Abnormal point (Failure mode / protection) LED indication(Outdoor P

3510-3. TROUBLESHOOTING CHECK TABLENo. Symptom LED indication Abnormal point/ Condition Condition Remedy1Outdoor unit does not oper-ate. 1-time fl ash

3610-4. TROUBLE CRITERION OF MAIN PARTSMUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUZ-GE18NA MUZ-GE24NAMUY-GE09NA MUY-GE12NA MUY-GE15NA MUY-GE18NA MUY-G

3710-5. TROUBLESHOOTING FLOWAre the voltages balanced?Disconnect the connector between compressor and the intelligent power module (IPM).Replace the i

38 F Check of compressor start failure D Check of compressor winding E Check of compressor operation time● Disconnect the connector between the com

39Is the resistance of thermistor normal? (Refer to 10-6.1.)Reconnect the connector of thermistor.Turn ON the power supply and press EMERGENCY OPERATI

4Outdoor unit model MUZ-GE09NA MUY-GE09NA MUZ-GE12NA MUY-GE12NA Capacity Rated (Minimum~Maximum) Cooling 1 Btu/h9,000( 3,800 ~ 12,200 )9,000( 3,800 ~

40 I Check of outdoor fan motorIs the resistance between each ter-minal of outdoor fan motor normal? (Refer to 10-4.)Disconnect the connectors CN931

41 J Check of power supplyIs there voltage 208/230 VAC between the indoor terminal block S1 and S2?NoYesReplace the indoor electronic control P.C. bo

42Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor

43 L Check of inverter P.C. boardCheck the outdoor fan motor. (Refer to 10-5. .)Is the fuse (F901) blown on the in-verter P.C. board?Check the connec

44 M How to check miswiring and serial signal errorTurn OFF inverter-controlled lighting equipment.Turn OFF the power supply and then turn ON again.P

45 N Electromagnetic noise enters into TV sets or radiosYesIs the unit grounded?NoGround the unit.YesIs the distance between the antennas and the ind

46-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61) (MUZ)Ambient temperature thermistor(RT65)Outdoor heat exchanger t

47-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61) (MUZ)Ambient temperature thermistor(RT65)Outdoor heat exchanger t

48-4 14 32 50 68 86 1040102030405060708090100Temperature(°F)Defrost thermistor(RT61) (MUZ)Ambient temperature thermistor(RT65)Outdoor heat exchanger t

4911-1. MUZ-GE09NA MUZ-GE12NA MUZ-GE15NA MUY-GE09NA MUY-GE12NA MUY-GE15NA NOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOT

5Outdoor unit model MUZ-GE15NA MUY-GE15NA MUZ-GE18NA MUY-GE18NA Capacity Rated (Minimum~Maximum) Cooling 1 Btu/h14,000( 3,100 ~ 18,200 )14,000( 3,100

50OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

51OPERATING PROCEDUREPHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and am

5211-2. MUZ-GE18NA MUY-GE18NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDUREPHOTOS1. Removing the cabinet(1) Remove the screws of

53OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

54Ambient tem-peraturethermistorOutdoor heat exchanger tempera-ture thermistorDefrost thermistorOPERATING PROCEDURE PHOTOS4. Removing the discharge te

5511-3. MUZ-GE24NA MUY-GE24NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of

56OPERATING PROCEDUREPHOTOS2. Removing the inverter assembly, inverter P.C. board(1) Remove the cabinet and panels. (Refer to 1.)(2) Disconnect the le

57OPERATING PROCEDURE PHOTOS4. Removing the discharge temperature thermistor, defrost thermistor, outdoor heat exchanger tempera-ture thermistor and a

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO.,LTDDistributed in Dec. 2010. No

6Outdoor unit model MUZ-GE24NA MUY-GE24NACapacity Rated (Minimum~Maximum) Cooling 1 Btu/h22,500(8,200 ~ 31,400)22,500(8,200 ~ 31,400)Heating 47 1 Btu

7Test conditionARI Mode Test Indoor air condition (°F) Outdoor air condition (°F)Dry bulb Wet bulb Dry bulb Wet bulbSEER (Cooling) "A-2" Co

8Unit: inchMUZ-GE09NA MUZ-GE12NA MUZ-GE15NAMUY-GE09NA MUY-GE12NA MUY-GE15NALiquid pipe :1/4 (flared)Gas pipe :3/8 (flared) (GE09/12) 1/2 (flared

916-7/161-9/161-5/8Drain hole6-7/819-11/16132Air inAir out2-holes 13/32 13/1614-3/1633-1/164-5/163-3/1634-5/817-25/32Service panel3-29/326-1/27-11/1