Mitsubishi Mr.Slim MS-A09WA Service Manual

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

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

11Outline of the functionThis air conditioner can memorize the abnormal condition which has occurred once.Even though LED indication listed on the tro

122. Indoor unit failure mode tableLeft lamp of OPERATION INDICATOR lampAbnormal point (Failure mode) Condition Correspondence Not lighted Normal —

138-3. INSTRUCTION OF TROUBLESHOOTINGIndoor unit oper-ates.Outdoor unit doesn't operate.If blinking of OPERATION INDI-CATOR lamp cannot be checke

148-4. TROUBLESHOOTING CHECK TABLEBefore taking measures, make sure that the symptom reappears for accurate troubleshooting.When the indoor unit has s

8-5. TROUBLE CRITERION OF MAIN PARTSMS-A09WA MS-A12WAPart name Check method and criterion FigureRoom temperature thermistor(RT11)Measure the resi

168-6. TROUBLESHOOTING FLOW A Check of indoor fan motorThe indoor fan motor error has occurred, and the indoor fan doesn't operate.Turn OFF the

17 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

18CN211Fuse(F11)Varistor(NR11)Indoor electroniccontrol P.C.Board C Check of indoor electronic control P.C. board and indoor fan motorTurn OFF the pow

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

MS-A09WA MS-A09WA -1MS-A12WA MS-A12WA -1 1. Remote controller has been changed. • Temperature indication function (°F/°C) has been added. (Refe

20Indoor coil thermistor [RT12]Room temperature thermistor (RT11)Temperature (°F)32 50 68 86104 122 140Resistance (k )MS-A09WA MS-A12WA Indoor e

MS-A09WA MS-A12WAOPERATING PROCEDURE PHOTOS1. Removing the panel(1) Remove the horizontal vane. (2) Remove the screw caps of the panel. Remove the s

OPERATING PROCEDUREPHOTOS2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, SW P.C. board and the terminal block(1)

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

2410 PARTS LIST10-1. PARTS LIST (non-RoHS compliant)MS-A09WA MS-A12WA 1. INDOOR UNIT STRUCTURAL PARTS2. ACCESSORY AND REMOTE CONTROLLER1824395612

253. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTSMS-A09WAMS-A12WA538176101113189121614151742No. Part No. Part name Symbol in Wiring Diagram Q&a

26Air cleaning filter(Blue bellows type)(1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catec

2710-2. RoHS PARTS LIST (RoHS compliant)MS-A09WA MS-A12WA 1. INDOOR UNIT STRUCTURAL PARTS2. ACCESSORY AND REMOTE CONTROLLER1824395612117(See 10-2

283. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTSMS-A09WAMS-A12WA53817612111419101317151618429No. RoHSPart No. Part name Symbol in Wiring Diagra

29Air cleaning filter(Blue bellows type)(1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catec

3PART NAMES AND FUNCTIONS2MS-A09WA MS-A12WA Line flow fanAir outletVertical vaneAir inletDisplay sectionFront panelPanelHeat exchangerHorizontal van

3011MICROPROCESSOR CONTROLOnce the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP(ON/OFF) button ON.Ind

311. Coil frost preventionCoil frost prevention is as same as COOL mode. (11-1.1.)2. Low outside temperature operationLow outside temperature operatio

32(3) Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle. Confirming of sta

33(8) To change the airfl ow direction not to blow directly onto your body.To change the airfl ow directionWhen to use this function? COOL/DRYPressing a

34(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

35EMERGENCY OPERATION switchE.O.SW11-7. EMERGENCY/TEST OPERATIONIn case of test run operation or emergency operation, use EMERGENCY OPERATION switch o

HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO.,LTDDistributed in Oc

4ACCESSORIESMS-A09WAMS-A12WAMS-A09/12WA MS-A09/12WA- 1Installation plate 1 1Installation plate fi xing screw 4 × 25 mm 8 5Remote controller holder 1 1F

5SPECIFICATION3Model MS-A09WA MS-A12WA Indoor unit model MS-A09WA MS-A12WA External fi nish White Power supply V, phase, Hz 115, 1, 60 Max.-fuse s

64OUTLINES AND DIMENSIONSMS-A12WAUnit : inchMS-A09WA11-3/4424-9/1630-11/168-1/43/162-1/83/46-1/42-5/16Air inAir outInstallation plate6-1/8 6-1/87/81-3

7WIRING DIAGRAM5REFRIGERANT SYSTEM DIAGRAM6MS-A09WAMS-A12WAIndoorheatexchangerFlared connectionRoom temperaturethermistorRT11Flared connectionRefriger

87SERVICE FUNCTIONS7-1. TIMER SHORT MODEFor service, set time can be shortened by short circuit of JPG and JPS the electronic control P.C. board.The t

9TROUBLESHOOTING88-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following1) Check the power supply voltage.2) Check the indoo