Mitsubishi Electric MSZ-FE12NA Service Manual

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

107-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS the indoor electronic control P.C. board. The time wi

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

12Signal transmitting sectionOperation display sectionOPERATE/STOP (ON/OFF) buttonFAN SPEED CONTROL buttonOPERATION SELECT buttonPOWERFUL buttonIndica

138-1. COOL ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. POWER lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-FE18NA) of the indoor uni

148-3. HEAT ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. POWER lamp (MSZ-FE09/12NA)/OPERATION INDICATOR lamp (MSZ-FE18NA) of the indoor unit

158-5. AUTO VANE OPERATION1. Horizontal vane(1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotatin

16(8) Cold air prevention in HEAT operationThe horizontal vane position is set to Upward.NOTE: When 2 or more indoor units are operated with multi out

178-6. i-see CONTROL OPERATION (MSZ-FE09NA MSZ-FE12NA)The sensors constantly measure the room and floor/wall temperatures to automatically adjust to

18Indoor unit installation location and air-conditioning area·Be sure to set the slide switch inside the remote controller to an appropriate position

19Operation and operating rangei-see sensor moves 30 degrees from the center in both right and left side.i-see Sensor operates as follows in accordanc

21TECHNICAL CHANGESMSZ-FE09NAMSZ-FE12NAMSZ-FE18NA 1. New modelRevision A:• MSZ-FE18NA has been added.Use the specifi ed refrigerant onlyNever use any

20(Example 1) The current time is 8:00 PM.The unit turns off at 11:00 PM, and on at 6:00 AM.• OFF timer and ON timer can be used in combination. The t

218-11. Changing temperature indication (°F/°C)8-10. 3-MINUTE TIME DELAY OPERATIONWhen the system turns OFF, compressor will not restart for 3 minutes

229-1. CAUTIONS ON TROUBLESHOOTING1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoor/outdoor connecti

23Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

242. Indoor unit failure mode tablePOWER lampUpper lampAbnormal point (Failure mode) Condition RemedyNot lighted Normal — —1-time fl ash every 0.5-se

25Indoor unit oper-ates.Outdoor unit does not operate.If blinking of OPERATION INDI-CATOR lamp cannot be checked, it can be checked with failure mode

269-4. TROUBLESHOOTING CHECK TABLEBefore taking measures, make sure that the symptom reappears for accurate troubleshooting.When the indoor unit has s

27 L AREA R POWER No. Abnormal point Operation indicator lamp Symptom Condition Remedy1MXZ type Operation mode settingMSZ-FE09/12NAPOWER

289-6. TROUBLESHOOTING FLOW A Check of indoor fan motorThe indoor fan motor error has occurred, and the indoor fan does not operate.Turn OFF the powe

29 B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner.Does th

3PART NAMES AND FUNCTIONS2MSZ-FE09NA MSZ-FE12NAFront panelAir filterAir inletOperation indicator lampPlatinum deodorizing filterAnti-allergy Enzyme Fil

30 C Check of indoor electronic control P.C. board and indoor fan motorTurn OFF the power supply.Remove indoor fan motor connector CN211, vane motor

31CN211R111Indoor electroniccontrol P.C. boardIndoor terminalP.C. boardFuse(F11)Varistor(NR11)YesNo 1. The fan motor connector's lead wire i

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

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

34MSZ-FE09NA MSZ-FE12NA1. Indoor electronic control P.C. board9-7. TEST POINT DIAGRAM AND VOLTAGERoom temperature thermistor (RT11)Indoor coil thermi

354. Indoor terminal P.C. board, Indoor electronic control P.C. board, Power monitor receiver SW P.C. boardRoom temperature thermistor (RT11)Indoor co

3610-1. MSZ-FE09NA MSZ-FE12NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDUREPHOTOS1. Removing the panel(1) Hold both sides of the

37OPERATING PROCEDUREPHOTOS2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, i-see Sensor, SW P.C. board and the t

38OPERATING PROCEDUREPHOTOS3. Removing the electrical box(1) Remove the panel (Refer to 1.) and the corner box.(2) Remove the indoor/outdoor connectin

39OPERATING PROCEDUREPHOTOS6. Removing the horizontal vane motor(1) Remove the nozzle assembly. (Refer to 4.)(2) Remove the screws of the horizontal v

4Remote controller Display sectionFront panelAir filter(Nano platinum filter)Air inletAir cleaning filter(Electrostatic anti-alergy enzyme filter)Air

4010-2. MSZ-FE18NANOTE: Turn OFF power supply before disassembly.OPERATING PROCEDURE PHOTOS1. Removing the panel(1) Remove the horizontal vanes.(2) Re

41OPERATING PROCEDURE PHOTOS3. Removing the indoor electrical box(1) Remove the panel (Refer to 1.) and the corner box.(2) Remove the indoor/outdoor c

42OPERATING PROCEDURE PHOTOS5. Removing the vertical vane motor unit(1) Remove the nozzle assembly. (Refer to 4.)(2) Remove the crank of the vertical

43OPERATING PROCEDURE PHOTOS7. Removing the water cut, the indoor fan motor, the indoor coil thermistor, and the line flow fan(1) Remove the panel (Re

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN© Copyright 2009 MITSUBISHI ELECTRIC CO., LTDDistributed in Apr. 2011.

53SPECIFICATIONIndoor modelMSZ-FE09NA MSZ-FE12NA MSZ-FE18NAPower supply V, phase, Hz 208/230 , 1 , 60Max. fuse size (time delay)/ Disconnect switchA15

64OUTLINES AND DIMENSIONSUnit: inchMSZ-FE09NA MSZ-FE12NA30-7/831-3/81/21-7/82-3/1611-5/827-1/163/42-5/166-1/41-11/162-11/162-3/163-15/161/210-1/8 1/4

75WIRING DIAGRAMMSZ-FE09NA MSZ-FE12NA

8MSZ-FE18NAMSZ-FE09NA - 8 MSZ-FE12NA - 8

9MSZ-FE09NA MSZ-FE12NARefrigerant flow in coolingRefrigerant flow in heatingUnit: inchIndoorheatexchangerFlared connectionRoom temperaturethermistorR