Mitsubishi-electric MSH-07NV Manuel d'utilisateur Page 1

SERVICE MANUALSPLIT-TYPE,HEAT PUMP AIR CONDITIONERSCONTENTS1. TECHNICAL CHANGES ····································2 2. PART NAMES AND FUNCTIONS·····

10CapacityElectrical dataCompressorIndoorfan motorOutdoorfan motorDimensionsWeightSpecial remarksModelFunctionPower supplyCoefficient of performance(C

11OUTLINES AND DIMENSIONS4MSH-07NV - MSH-09NV - MSH-07NV - MSH-09NV -E2E2E1E1MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -E2E2E1E1INDOOR UNITOUT

12MSH-12NV - MSH-12NV -E2E1MUH-12NV - MUH-12NV -E2E1INDOOR UNITOUTDOOR UNIT9.52If the right/left sides or back side is vacant,thefront has only to

OUTDOOR UNIT13MSH-18NV - MSH-24NV - MSH-18NV - MSH-24NV - MSH-18NV -E3E2E2E1E1MUH-18NV - MUH-18NV - MUH-18NV -E3E2E1INDOOR UNIT33 297297450450

14MUH-24NV- MUH-24NV- Unit : mm (inch)E2E1100 101000For 10 units or less200Outdoor Unit-Necessary surrounding clearance(Concentrated installation)The

15WIRING DIAGRAM5NOTE:1. For the outdoor electric wiring refer to the outdoor unit electric wiring diagram for servicing.2. Use copper conductors only

16MSH-12NV -E1MUH-12NV -E1MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNIT❈❈❈❈❈❈~/N~TO OUTDOORUNITCONNECTING12VDCL32N;FOR MULTI SYSTE

17MSH-18NV -E1MUH-18NV -E1MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNIT❈❈❈❈❈❈SYMBOLTBDSARHIC1SYMBOLNR11RT11RT12IC14152CSYMBOLC11F1

18MSH-24NV -E1MUH-24NV -E1MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNITNFWHTBLUBLU4312111CN52CCIRCUIT BREAKERRT12IC141112CNHIC1NR1

19MSH-07NV - MSH-09NV - MSH-12NV -E2E2E2MUH-07NV - MUH-09NV -E2E2MODELS WIRING DIAGRAMMODELS WIRING DIAGRAMINDOOR UNITOUTDOOR UNITCIRCUIT BREAKER

2TECHNICAL CHANGESMSH-17NV - ➔MSH-07NV -1. Indoor electronic control P.C.board has changed.However, it is compatible between and models.2. Auto r

20MUH-12NV -E2MODEL WIRING DIAGRAMOUTDOOR UNIT21S4SR61CN661 CN721X62MCMF52C43WHTREDBLUBLUBLKWHTORNREDBLKWHTREDTRANSRSCC1REDBLK12VDCGRN/YLWTOINDOOR UN

21MSH-18NV -E2MUH-18NV -E2MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNIT~/NTO OUTDOORUNITCONNECTING12VDCL32NFOR MULTI SYSTEM;SYMBOL

22MSH-24NV -E2MUH-24NV -E2MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNITNFWHTBLUBLU431111CN52CCIRCUIT BREAKERRT12IC141112CNHIC1NR11

23MSH-18NV -E3MUH-18NV -E3MODEL WIRING DIAGRAMMODEL WIRING DIAGRAMINDOOR UNITOUTDOOR UNITCIRCUIT BREAKERN212VDCL50HzCORDPOWERSUPPLY~/N 220-240VF11NR

24REFRIGERANT SYSTEM DIAGRAM6MSH-07NV -MSH-07NV -E2E1MUH-07NV -MUH-07NV -E2E1INDOOR UNITOUTDOOR UNITIndoorheatexchangerRoom temperaturethermistorR

25Unit:mmMSH-12NV -MSH-12NV -E2E1MUH-12NV -MUH-12NV -E2E1INDOOR UNITOUTDOOR UNIT(with heat insulator)(with heat insulator)Refrigerant pipe [12.7(

26MSH-24NV -MSH-24NV -E2E1MUH-24NV -MUH-24NV -E2E1INDOOR UNITOUTDOOR UNITIndoorheatexchangerRoom temperaturethermistorRT11Refrigerant pipe [15.88

27Models Piping size O.D : mm Length of connecting pipe : mRefrigerant pipingMax. length : m A1015Indoor unit0.43Gas9.5212.715.88Liquid6.359.52Outdoor

28EVACUATION PROCEDURES(AIR PURGE)Pipe length :7m maximumNo gas chargeis neededPipe lengthexceeding 7mCharge the prescribedamount of gasTighten the ca

297The standard data contained in these specifications apply only to the operation of the air conditioner under normal conditions,since operating cond

3PART NAMES AND FUNCTIONS2INDOOR UNITMSH-07NV - MSH-07NV -MSH-09NV - MSH-09NV -MSH-12NV - MSH-12NV -E2E1E2E1E2E1OUTDOOR UNITMUH-12NV -MUH-18NV

300.70.60.50.40.376543Outdoor low pressureAmbient temperature(˚C)Ambient humidity(%)Ambient temperature(˚C)Ambient humidity(%)MUH-07NV -E2E1MUH-07NV

310.70.60.50.40.376543MUH-12NV -E2E1MUH-12NV -E2E1Outdoor low pressureAmbient temperature(˚C)Ambient humidity(%)Ambient temperature(˚C)Ambient humid

32HEAT operationCondition indoor:Dry bulb temperature 20.0°CWet bulb temperature 14.5°COutdoor:Dry bulb temperature 7,15,20°CWet bulb temperature 6,12

33MICROPROCESSOR CONTROL8Once the controls are set, the same operation mode can berepeated by simply turning the OPERATE/STOP button ON.Indoor unit re

34ModelCOOL mode of"I FEEL CONTROL"DRY mode of"I FEEL CONTROL"HEAT mode of"I FEEL CONTROL"Initial room temperature In

35NOTE : Coil frost prevention during COOL mode of “I FEEL CONTROL”There are two types of controls in coil frost prevention.① Temperature control<M

36— HEAT mode of “I FEEL CONTROL” —1. Indoor fan speed control(1) Followings are the fan speed in AUTO.Set temperature minus room temperature: 2 degre

37NOTE 1 :When the outdoor fan is OFF in heating, defrosting of outdoor heat exchanger is not detected by the defrost thermis-tor RT61.NOTE 2 :When co

38NOTE1 ● When the indoor coil thermistor reads above 18°C, indoor fan operates at VLo for 30 seconds.● When the indoor coil thermistor reads 18°C or

398-2. COOL ( ) OPERATION(1) Press OPERATE/STOP button.OPERATION INDICATOR of the indoor unit turns on with a beep tone.(2) Select COOL mode.(3) Set t

4REMOTE CONTROLLERMSH-07NV - MSH-09NV - MSH-12NV - MSH-18NV - MSH-18NV -E2E1E1E1E1OB207t-1qxp 25/9/97 8:51 PM Page 4

40SLEEP8-6. AUTO VANE OPERATION(1) Vane motor driveMSH-N series is equipped with a stepping motor for the vane. The rotating direction, speed, and ang

41(3) PositioningThe vane is once pressed to the vane stopper below to confirm the standard position and then set to the desired angle.The positioning

428-8. TIMER OPERATION1. How to set the timer(1) Press OPERATE/STOP button to start the air conditioner.(2) Check that the current time is set correct

438-9. EMERGENCY-TEST OPERATIONWhen the remote controller is missing, has failed or the batteries run down, press the EMERGENCY OPERATION switchon the

449SERVICE FUNCTIONS1. COMPULSORY DEFROSTING MODE FOR SERVICEBy short circuit of the connector JP607 and R853 on the outdoor deicer P.C. board, defros

45How to modify the remote controller P.C. boardRemove batteries before modification.The board has a print as shown below :The P.C.board has the print

46When the indoor unit is controlled with the remote controller, the operation mode, set temperature, and the fan speed arememorized by the indoor ele

4710 TROUBLESHOOTING10-1 Cautions on troubleshooting10-1-1 Before troubleshooting, check the followings:1) Check the power supply voltage.2) Check the

4810-2 Instruction of troubleshootingIndoor unit oper-ates. Outdoor unitdoesn’t operate.Outdoor unitoperates inonly TestRun opera-tion.Outdoor unitdoe

4910-2-1 troubleshooting check table❈ Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.Self check tableNO.12

5MSH-07NV - (Serial number 7000201T~) MSH-09NV - (Serial number 7000201T~)MSH-12NV - (Serial number 7000001T~) MSH-24NV -MSH-07NV - MSH-09NV -MS

50Measure the resistance between the terminals with a tester.(Coil wiring temperature10°C ~ 30°C)CompressorRoom temperaturethermistor10-2-2 Trouble cr

51YesYesCheck of indoor fan motorACheck of receiver P.C. boardBInodoor fan does not operate.Repair the indoor fan motor.Disconnect lead wires from con

52Check both “parts side”and “patternside”of indoor electronic control P.C.board visually.Check of indoor electronic control P.C. boardCThe unit doesn

53YesYesHow to check mis-wiring and serial signal error (when outdoor unit does not work)E1. Turn OFF power supply.2. Turn ON power supply.3. Press EM

54YesYesHow to check mis-wiring and serial signal error (when outdoor unit does not work)E1. Turn OFF power supply.2. Turn ON power supply.3. Press EM

55TEST POINT DIAGRAM AND VOLTAGEMSH-18NV -Indoor electric control P.C.boardE1}}}}}Fan motor power supplyFuse AC250V 3.15APower supply inputAC 220-240

56MUH-18NV -Outdoor deicer P.C. boardE1}Defrostthermistor(RT61)}}}}}}}+--Outdoor fan motorAC 220-240VReversing valve coilAC 220-240VR601DC5~10VINPUTA

57TEST POINT DIAGRAM AND VOLTAGEMSH-07NV - MSH-09NV - MSH-12NV -MSH-07NV - MSH-09NV - MSH-12NV -Indoor electronic control P.C. boardE2E2E2E1E1E1CN201

58TEST POINT DIAGRAM AND VOLTAGEMSH-24NV - MSH-18NV -MSH-24NV - MSH-18NV -E3E2E2E1Fan motor power supplyFuse AC 250V 3.15A}Power supply inputAC 22

59MUH-07NV - MUH-09NV - MUH-12NV -MUH-24NV - MUH-07NV - MUH-09NV -MUH-12NV - MUH-18NV - MUH-24NV -MUH-18NV -Outdoor deicer P.C. boardE3E2E2E

6SPECIFICATION3CapacityElectrical dataCompressorIndoorfan motorOutdoorfan motorDimensionsWeightSpecial remarksModelFunctionPower supplyCoefficient of

6011DISASSEMBLY INSTRUCTIONS2. Removing the electronic control P.C. board and thedisplay P.C. board.(1) Remove the front panel. (Refer to 1)(2) Remove

61OPERATING PROCEDURE PHOTOS3. Removing the electrical box(1) Remove the front panel. (Refer to 1)(2) Remove the electrical cover.(3) Disconnect the c

62OPERATING PROCEDURE PHOTOS1. Removing the front panel(1) Remove the screw caps at the down of the front panel.Remove the screws.(2) Pull the panel d

63OPERATING PROCEDUREPHOTOS3. Removing the electrical box(1) Remove the front panel. (Refer to 1)(2) Remove the electrical cover.(3) Disconnect the co

6411-3 MUH-07NV - MUH-09NV - MUH-07NV - MUH-09NV -OUTDOOR UNITE2E2E1E1OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the top panel.(2

65OPERATING PROCEDURE PHOTOS4. Removing the outdoor fan motor(1) Remove the screws securing the outdoor fan motor.(2) Remove the lead clamps.(3) Disco

66OPERATING PROCEDURE PHOTOS1. Removing the cabinet(1) Remove the screws of the cabinet.(2) Hold the down of the cabinet on the both side to removethe

67OPERATING PROCEDURE PHOTOS3. Removing the outdoor fan motor(1) Remove the cabinet. (Refer to 1)(2) Disconnect the connector remove the clamp of fan

68OPERATING PROCEDURE PHOTOS1. Removing the electrical parts(1)Remove the screws and the top panel.(2)Remove the screw of the cover panel. To remove

69OPERATING PROCEDURE PHOTOS3. Removing the heat exchanger and the compressor(1)Remove the rear panel.Remove the valve bed, andopen the rear panel to

7CapacityElectrical dataCompressorIndoorfan motorOutdoorfan motorDimensionsWeightSpecial remarksModelFunctionPower supplyCoefficient of performance(C.

7012 PARTS LIST123456E02 154 000E02 157 000E02 199 000E02 151 010E02 164 100E02 151 234E02 166 234E02 151 970E02 166 067FRONT PANEL(WH)FRONT PANEL(WH)

71Symbolin WiringDiagramQ'ty/unitRemarksPart No.NO. Part NameMSH-07NV- (WH)E1 E2MSH-09NV- (WH)E1 E2MSH-12NV-

72E02 096 232E02 085 297E02 199 521E02 085 245E02 096 630E02 128 900E02 164 900E02 047 506E02 096 290E02 096 662E02 096 661E02 085 515E02 154 642E02 0

731234567PROPELLER FANOUTDOOR FAN MOTORCOMPRESSOR CAPACITORTERMINAL BLOCKDEFROST THERMISTORDEICER P.C. BOARDREVERSING VALVE COILRA6V29-25+/440VACMFC1T

74Part number that are circled is not shown in the illustration.123456789101112131415161718192021GRILLCABINET ASSEMBLYBACK PANELSERVICE PANELCOMPRESSO

75Symbolin WiringDiagramQ'ty/unit1PC/SET3PCS/SETRemarksPart No.NO.Part NameMSH-18NV- MSH-24NV- 1234567FRONT PANEL(WH)GRILLE(WH)BOX(WH)AIR FILTER

7612345678910111213141516171819NO.E02 143 235E02 143 040E02 141 702E02 141 300E02 213 300E02 001 505E02 138 395E02 320 395E02 139 450E02 198 450E02 21

77Symbolin WiringDiagramQ'ty/unitMUH-18NV-RemarksPart No.NO. Part NameE3E2E1E02 141 232E02 141 521E02 141 245E02 139 630E02 139 515E02 139 900E02

7817137 5 312222048961412 15 1611181019OUTDOOR UNITSTRUCTURAL PARTSMUH-24NV-MUH-24NV-E2E12423OB207t-3qxp 25/9/97 9:11 PM Page 78

79OUTDOOR UNITSTRUCTURAL PARTSMUH-24NV-MUH-24NV-E2E1Symbolin WiringDiagramQ'ty/unitMUH-24NV-RemarksPart No.NO. Part NameE1MUH-24NV-E2E02 214 232E

8CapacityElectrical dataCompressorIndoorfan motorOutdoorfan motorDimensionsWeightSpecial remarksModelFunctionPower supplyCoefficient of performance(C.

New publication, effective Sep. 1997Specifications subject to change without notice.CCCopyright 1997 MITSUBISHI ELECTRIC ENGINIEERING CO.,LTDIssued in

9CapacityElectrical dataCompressorIndoorfan motorOutdoorfan motorDimensionsWeightSpecial remarksModelFunctionPower supplyCoefficient of performance(C.