Mitsubishi Electric MFZ-KA09NA Manuale di Servizio

SERVICE MANUALCONTENTS1. TECHNICAL CHANGES·······································22. PART NAMES AND FUNCTIONS ····················· 2 3. SPECIFICATION

10MFZ-KA09NA MFZ-KA12NA MFZ-KA18NA8MICROPROCESSOR CONTROLOnce the operation mode is set, the same operation mode can be repeated by simply turning O

118-1. COOL ( ) OPERATION(1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone.(2) Select C

128-5. AUTO VANE OPERATION Horizontal vane(1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating

13Set the air outlet selection switch to .Set the air outlet selection switch to .Air blows out automatically from the upper and lower air outlets as

148-6. 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 c

158-7. SMART SET ( ) OPERATION1. How to SET SMART SET operation(1) Press OPERATE/STOP (ON/OFF) button.(2) Select COOL, HEAT or ECONO COOL mode.(3) Pre

16MFZ-KA09NA MFZ-KA12NA MFZ-KA18NALead wiringHousing pointRESET buttonInsert the negative pole of the batteries first. Check if the polarity of the

179-2. FAILURE MODE RECALL FUNCTIONOutline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though

182. Indoor unit failure mode tableNOTE: Blinking patterns of this mode differs from the ones of Troubleshooting check table (9-4.). 12-time flash2.5-

199-3. INSTRUCTION OF TROUBLESHOOTINGStartIndoor unit operates.Outdoor unit does notoperate.Indoor unit doesnot receive the signal from remote control

2MFZ-KA09NA MFZ-KA12NA MFZ-KA18NA 1. New model1TECHNICAL CHANGESMFZ-KA09NA MFZ-KA12NA MFZ-KA18NA2PART NAMES AND FUNCTIONSVertical vaneAir outletH

209-4. TROUBLESHOOTING CHECK TABLENOTE: When the indoor unit has started operation and the above failures are detected (the first detection after the

21OPERATION INDICATORNot lightedBlinkingLightedNOTE: When the indoor unit has started operation and the above failures are detected (the first detecti

229-6. TROUBLESHOOTING FLOW -1. Check of indoor fan motor (upper)AWhen the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right la

23 If more than 12 seconds passes after EMERGENCY OPERATION switchis pressed, the voltage mentioned in above 2) goes 0 VDC although theindoor electro

24 B Check of remote controller and indoor electronic control P.C. board No(not clear)Check if the remote controller is exclusive for this air condit

25 C Check of indoor P.C. board and indoor fan motorThe unit cannot be operated with the remote controller.Also, OPERATION INDICATOR lamp does not li

26 D How to check miswiring and serial signal errorWhen the left lamp of OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.Outdoor unit

27 Check of damperWhen the left lamp of OPERATION INDICATOR lamp flashes 15-time. Indoor unit and outdoor unit do not operate.JR06JR05Turn OFF th

28 Electromagnetic noise enters into TV sets or radiosNoNoNoYesYesNoNoYesYesYesIs the distance between theantennas and the indoorunit within 3 m,

29Indoor coil thermistor [RT12,RT14,RT15 (MAIN), RT13 (SUB)] Room temperature thermistor (RT11)Temperature (°C)Resistance (kΩ)MFZ-KA09NA MFZ-KA12NA

3ACCESSORIESREMOTE CONTROLLERDrain hoseRemote controller holderFixing screw for 3.5 x 1.6 mm (Black)Pipe coverBandBattery (AAA) for remote control

30(1) Slide the sleeve and check if there is a locking lever or not.(2) The terminal with this connector has the locking mechanism.Slide the s

312. Removing the electronic control P.C. board and the display receiver P.C. board (1) Remove the panel. (Refer to 1.) (2) Remove the screw of

32OPERATING PROCEDURE PHOTOSPhoto 74. Removing the horizontal vane motor unit (1) Remove the panel. (Refer to 1.) (2) Remove the screws of the h

33OPERATING PROCEDURE PHOTOSPhoto 11Photo 13Photo 10Photo 12Screws of the damper lock motor (Right)Lead wires of the damper motor and the damper lock

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HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPAN Copyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Jan

4Indoor model MFZ-KA09NA MFZ-KA12NA MFZ-KA18NAPower supply V, phase, Hz 208/230, 1, 60Max. fuse size (time delay)/ Disconnect switchA15Airfl owSuper Hi

54OUTLINES AND DIMENSIONS2-3/815/323/42-3/84-15/165-25/3217-7/86-1/82-3/81-6/161-25/324-5/163-5/322-3/82-27/3213-9/32 13-9/3214-5/1613-1/88-9/3223-11/

6MFZ-KA09NA MFZ-KA12NA MFZ-KA18NA 5WIRING DIAGRAM

7MFZ-KA09NA MFZ-KA12NA MFZ-KA18NA Unit: inch6REFRIGERANT SYSTEM DIAGRAMIndoorheatexchangerFlared connectionRoom temperaturethermistorRT11Indoor

8MFZ-KA09NA MFZ-KA12NA MFZ-KA18NA7SERVICE FUNCTIONS7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on

9NOTE: • The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller.• If main powe