Mitsubishi Electric MFZ-KA25VA Wartungshandbuch

CONTENTS1.TECHNICAL CHANGES ·····································22. PART NAMES AND FUNCTIONS······················23. SPECIFICATION··················

10OUTDOOR LOW PRESSURE AND OUTDOOR UNIT CURRENT24.422.620.718.816.915.013.211.327.525.423.321.219.116.914.812.7Indoor air Dry-bulb temperaturedifferen

11Outdoor unit current(A)3218Ambient temperature(˚C) Ambient humidity(%)SUZ-KA35VA.THOutdoor unit current(A)Ambient temperature(˚C) Ambient humidity(%

1221 18 2.94 1.41 0.48 464 2.81 1.35 0.48 487 2.70 1.30 0.48 510 2.60 1.25 0.48 53421 20 3.06 1.10 0.36 487 2.94 1.06 0.36 516 2.85 1.03 0.36 528 2.75

1321 18 2.45 1.18 0.48 568 2.25 1.08 0.48 603 2.08 1.00 0.48 62621 20 2.58 0.93 0.36 592 2.40 0.86 0.36 621 2.23 0.80 0.36 65522 18 2.45 1.27 0.52 568

1421 18 4.11 1.93 0.47 872 3.94 1.85 0.47 916 3.78 1.78 0.47 959 3.64 1.71 0.47 100321 20 4.29 1.50 0.35 916 4.11 1.44 0.35 970 3.99 1.40 0.35 992 3.8

1521 18 3.43 1.61 0.47 1068 3.15 1.48 0.47 1134 2.91 1.37 0.47 117721 20 3.61 1.26 0.35 1112 3.36 1.18 0.35 1166 3.12 1.09 0.35 123222 18 3.43 1.75 0.

1621 18 5.64 2.54 0.45 1240 5.40 2.43 0.45 1302 5.18 2.33 0.45 1364 4.99 2.25 0.45 142621 20 5.88 1.94 0.33 1302 5.64 1.86 0.33 1380 5.47 1.81 0.33 14

1721 18 4.70 2.12 0.45 1519 4.32 1.94 0.45 1612 3.98 1.79 0.45 167421 20 4.94 1.63 0.33 1581 4.61 1.52 0.33 1659 4.27 1.41 0.33 175222 18 4.70 2.30 0.

18INDOOR-10Q INPUT-5Q INPUT0Q INPUT5Q INPUT10Q INPUT15Q INPUT20Q INPUT1521262.142.041.845345856262.582.452.286516937353.032.892.697358688103.473.303.1

19SERVICE FUNCTIONS99-1. TIMER SHORT MODEFor service, set time can be shortened by short circuit of JPG and JPS on the electronic control P.C. board.T

21TECHNICAL CHANGES2PART NAMES AND FUNCTIONSINDOOR UNITMFZ-KA25VAMFZ-KA35VAMFZ-KA50VAVertical vaneAir outletHorizontal vaneCatechin air filterDisplay

20NOTE:• The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remotecontroller.• If main power

21TROUBLESHOOTING1010-1. Cautions on troubleshooting1. Before troubleshooting, check the following:1) Check the power supply voltage.2) Check the indo

22Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though OPERATION INDICATOR lamp indicat

232. Indoor unit failure mode tableNOTE:Blinking patterns of this mode differs from the ones of Troubleshooting check table (10-4.). 12-time flash2.5-

24StartIndoor unit operates.Outdoor unit doesn't operate.Indoor unit doesn't receive the signal from remote controller.OPERATION INDICATORl

25NOTE : When the indoor unit has started operation and the above failures are detected (the first detection after the power ON), the indoor electr

2610-5. Trouble judgement criteria of main partsMFZ-KA25VA MFZ-KA35VA MFZ-KA50VAPart name FigureCheck method and criteriaIndoor fan motor (Upper)(MF1)

27-1. Check of indoor fan motor (upper)AWhen the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR lamp

28-2. Check of indoor fan motor (lower)AWhen the left lamp of OPERATION INDICATOR lamp flashes 3 times and the right lamp of OPERATION INDICATOR lamp

29Check of remote controller and receiver P.C. board BIndoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remot

3ACCESSORIESREMOTE CONTROLLER1234567890123Drain hoseRemote controller holderFixing screw for 2 3.5 o 1.6 mm (Black)Pipe coverBandBattery (AAA) for rem

30The unit cannot be operated with the remote controller.Also, OPERATION INDICATOR lamp does not light up by pressing EMERGENCY OPERATION switch.Check

31How to check mis-wiring and serial signal errorDWhen the left lamp of OPERATION INDICATOR lamp flashes ON and OFF in every 0.5-second.Outdoor unit d

32Check of damperEWhen the left lamp of OPERATION INDICATOR lamp flashes 15-time. Indoor unit and outdoor unit do not operate.Turn OFF the power suppl

33Electromagnetic noise enters into TV sets or radiosFNoNoNoYesYesNoNoYesYesYesIs the distance between theantennas and the indoorunit within 3m, or is

34Indoor coil thermistor [RT12,RT14,RT15 (MAIN), RT13 (SUB)] Room temperature thermistor (RT11)Temperature (:)Resistance (k")MFZ-KA25VA MFZ-KA35V

35DISASSEMBLY INSTRUCTIONS11(1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the loc

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

37OPERATING PROCEDURE PHOTOSPhoto 74. Removing the horizontal vane motor unit(1) Remove the panel. (Refer to 1.)(2) Remove the screws of the horizonta

38OPERATING PROCEDURE PHOTOSPhoto 11Photo 13Photo 10Photo 12Screws of the damper lock motor (Right)Screws of thedamper motorLead wires of the damper m

39PARTS LIST (non-RoHS compliant)12MFZ-KA25VAMFZ-KA35VAMFZ-KA50VA12-1. INDOOR UNIT STRUCTURAL PARTSNo.Part No.Part nameRemarksSymbolin WiringDiagramQ&

43SPECIFICATIONCooling522426/ 348/ 288 1,080940/ 800/ 700880 740/ 650/ 550MFZ-KA35VAMFZ-KA25VA MFZ-KA50VA Indoor modelFunctionPower supplySingle pha

4012-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTSMFZ-KA25VAMFZ-KA35VAMFZ-KA50VA123456714 15 12 191618242123 228912131011172526201815PARTS LIST

41NOZZLE ASSEMBLY (UPPER)HORIZONTAL VANE (BACK)HORIZONTAL VANE (FRONT)VANE SLEEVEBEARING ASSEMBLYNOZZLE ASSEMBLY (LOWER)DAMPER MOTORVANE MOTOR SUPPORT

42MFZ-KA25VAMFZ-KA35VAMFZ-KA50VA512-4. INDOOR UNIT HEAT EXCHANGER2341HAIR PIN COVERINDOOR HEAT EXCHANGERINDOOR HEAT EXCHANGERUNION (LIQ) UNION (GAS) U

43RoHS PARTS LIST (RoHS compliant)13MFZ-KA25VAMFZ-KA35VAMFZ-KA50VA13-1. INDOOR UNIT STRUCTURAL PARTSNo.RoHSPart No.Part nameRemarksSymbolin WiringDia

4413-3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTSMFZ-KA25VAMFZ-KA35VAMFZ-KA50VA123456714 15 12 191618242123 228912131011172526201815RoHS PARTS

45NOZZLE ASSEMBLY (UPPER)HORIZONTAL VANE (BACK)HORIZONTAL VANE (FRONT)VANE SLEEVEBEARING ASSEMBLYNOZZLE ASSEMBLY (LOWER)DAMPER MOTORVANE MOTOR SUPPORT

46MFZ-KA25VAMFZ-KA35VAMFZ-KA50VA513-4. INDOOR UNIT HEAT EXCHANGER2341HAIR PIN COVERINDOOR HEAT EXCHANGERINDOOR HEAT EXCHANGERUNION (LIQ) UNION (GAS) U

47OPTIONAL PARTS14ModelPart No.A1A2MAC-415FT-EMFZ-KA25VA-MFZ-KA25VA-MFZ-KA35VA-MFZ-KA35VA-MFZ-KA50VA-MFZ-KA50VA-A1A2A2A1Replacement of the air cleanin

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO100-8310, JAPANCCCopyright 2005 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Ju

5T3.15AL 250V12V 300"12V 300"12V 300"12V 300"ERZV14D471ItemModelFuse Damper lock motor RightDamper lock motor LeftHorizontal vane

64NOISE CRITERIA CURVESOCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 20 µPaOCTAVE BAND SOUND PRESSURE LEVEL, 0dB = 20 µPaOCTAVE BAND SOUND PRESSURE LEVEL, 0

7OUTLINES AND DIMENSIONS5Unit : mmINDOOR UNIT60121960125147454155603545110806072337 33736333321059371311314-[6 HoleIndoor unitInstallation plate961231

86WIRING DIAGRAMREFRIGERANT SYSTEM DIAGRAM7IndoorheatexchangerFlared connectionRoom temperaturethermistorRT11Indoor coil thermistorRT12, RT14,RT15 (ma

9PERFORMANCE CURVES8Wet-and dry-bulbthermometersBACK VIEWOUTDOOR UNITFRONT VIEWWet and dry-bulbthermometersIndoor air Wet-bulb temperaturedifference (