Mitsubishi Electric MSZ-GC50NA Manuel de service

SERVICE MANUALCONTENTS1. PART NAMES AND FUNCTIONS ····················· 32. SPECIFICATION ················································ 43. OUTLINE

106-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the indoor electronic control P.C. board. The time

11NOTE:• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.• If main powe

12NOTE: Last setting will be stored after the unit is turned OFF with the remote controller. Indoor unit receives the signal of the remote controller

137-1. COOL ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns ON.(2) Select COOL mode with O

14NOTE 2 FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT : MXZ series Multi system air conditioner can connect two or more indoor units with one outdo

15(5) STOP (operation OFF) and ON TIMER standbyIn the following cases, the horizontal vane returns to the closed position.(a) When OPERATE/STOP (ON/OF

16(11) LONG ( ) MODE (MSZ-GC60/71)By pressing LONG button indoor fan speed becomes faster than setting fan speed on the remote controller, and the hor

177-6. TIMER OPERATION1. How to set the time(1) Check that the current time is set correctly.NOTE : Timer operation will not work without setting the

18EMERGENCY OPERATION switch7-7. EMERGENCY/TEST OPERATIONIn case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the r

19 3. Troubleshooting procedure1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing on and off to indicate an abnormality.

2 Revision A: • MSZ-GC35NA - C2 has been added.MSZ-GC35NA - C1 → MSZ-GC35NA - C2 • FAN MOTOR has been changed. (AC → DC)

20MSZ-GC22/25/35/50 MSZ-GC60/71Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED

212. Indoor unit failure mode tableUpper or left lamp of OPERATION INDICATOR lampAbnormal point (Failure mode) Condition Correspondence Not lighted N

228-3. INSTRUCTION OF TROUBLESHOOTINGIndoor unit oper-ates.Outdoor unit doesn't operate.If blinking of OPERATION INDI-CATOR lamp cannot be checke

238-4. TROUBLESHOOTING CHECK TABLEBefore taking measures, make sure that the symptom reappears for accurate troubleshooting.When the indoor unit has s

248-5. TROUBLE CRITERION OF MAIN PARTSMSZ-GC22NA MSZ-GC25NA MSZ-GC35NA MSZ-GC50NA MSZ-GC60NA MSZ-GC71NA Part name Check method and criterion Fi

25 A Check of indoor fan motor8-6. TROUBLESHOOTING FLOWCN211Indoor power P.C.boardFuse (F11)Indoor terminal P.C.boardVaristor(NR11)CN121Yes ( 0 or

26MSZ-GC35/NA - C2 Turn OFF the power supply.Is there any foreign matter that interferes the rotation of the line fl ow fan?YesNoRemove the foreign mat

27MSZ-GC50/60/71NATurn OFF the power supply.Is there any foreign matter that interferes the rotation of the line fl ow fan?YesNoRemove the foreign matt

28 B Check of remote controller and indoor P.C. board Check if the remote controller is exclusive for this air conditioner.• Reinstall the unit away

29 C Check of indoor P.C. board and indoor fan motorMSZ-GC22/25/35NAJPG (GND)12VDC5VDCCN10A CN211Indoor power P.C.boardIndoor electronic control P.C.

3Remote controlreceiving sectionEmergency operation switchEmergency operation switchOperation indicator lampRemote controlreceiving sectionOperation I

30MSZ-GC50/60/71NATurn OFF the power supply.Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control

31MSZ-GC22/25/35NA D How to check miswiring and serial signal errorReplace the indoor power P.C. board and the indoor terminal P.C. boardTurn OFF the

32MSZ-GC50/60/71NATurn OFF the power supply.Is there rated voltage in the power supply?YesNoTurn ON the power supply.Check the power supply.Is there r

33MSZ-GC22/25/35/50NA E Check of installation of the horizontal vaneIs the stopper of the horizontal vane locked to the indoor unit correctly?YesNoRe

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

351. Indoor power P.C. board, Indoor terminal P.C. boardMSZ-GC22NA MSZ-GC25NA MSZ-GC35NA - C18-7. Test point diagram and voltageIndoor terminal P.C.

36Room temperature thermistor (RT11)Indoor coil thermistor (RT12, RT13)Temperature (°C)Resistance (k )Timer short modepoint JPG JPS(Refer to 6-1.)Roo

37Room temperature thermistor (RT11)Indoor coil thermistor (RT12, RT13)Temperature (°C)Resistance (k )MSZ-GC50NARelease of Auto restart functionSolde

38(+)0 or 15 VDCRoom temperature thermistor (RT11)Indoor coil thermistor (RT12, RT13)Temperature (°C)Resistance (k )MSZ-GC60NA MSZ-GC71NARelease of

399-1. MSZ-GC22NA MSZ-GC25NA MSZ-GC35NAOPERATING PROCEDURE PHOTOS1. Removing the panel(1) Remove the screw caps of the panel. Remove the screws. (2

4Indoor model MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA Function Cooling Heating Cooling Heating Cooling Heating Power supply Single phase 220 - 230 V, 60 H

40OPERATING PROCEDUREPHOTOS3. Remove the indoor power P.C. board, the indoor ter-minal P.C. board, and the electrical box(1) Turn the breaker OFF.(2)

41OPERATING PROCEDUREPHOTOS5. Removing the indoor fan motor, the indoor coil ther-mistor, and the line flow fan(1) Remove the panel (refer to 1.) and

429-2. MSZ-GC50NAOPERATING PROCEDUREPHOTOS1. Removing the panel(1) Remove the horizontal vane. (2) Remove the screw caps of the panel. Remove the scre

43OPERATING PROCEDUREPHOTOS2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, SW P.C. board and the terminal block(

44OPERATING PROCEDUREPHOTOS4. Removing the horizontal vane motor unit(1) Remove the horizontal vane and the panel. (Refer to 1.)(2) Remove the screws

459-3.MSZ-GC60NA MSZ-GC71NAOPERATING PROCEDUREPHOTOS1. Removing the front panel(1) Remove the screw caps of the front panel. Remove the screws.(2) P

46OPERATING PROCEDUREPHOTOS4. Removing the vane motor(1) Remove the front panel. (Refer to 1.)(2) Remove the electrical cover. (Refer to 2.)(3) Remove

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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2007 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Au

5Unit : mm745941.5214235253.518.5320335155 15521540.5254.55959 225 225229553 607 1288100137119PipingInsulationø35 O.DLiquid lineø6.35 - 0.5 m (Flared

6258477.5315255.5472.59817398 173414.5 414.552537915610681100325Air outAir inInsulation ø28Drain hose ø16(Connected part O.D)Installation plateWall ho

7MSZ-GC22NA MSZ-GC25NA MSZ-GC35NA - C1MSZ-GC35NA - C24WIRING DIAGRAM

8MSZ-GC50NA MSZ-GC60NA MSZ-GC71NA

9MSZ-GC22NA MSZ-GC25NAMSZ-GC35NAIndoorheatexchangerFlared connectionRoom temperaturethermistorRT11Indoor coil thermistorRT13(sub)Flared connectionRef