Mitsubishi Electric SEZ-A24AR Manuel de service

TECHNICAL & SERVICE MANUALCONTENTS1. PART NAMES AND FUNCTIONS········22. SPECIFICATIONS·································43. OUTLINES AND DIMENSION

106TROUBLESHOOTING6-1. Cautions on troubleshooting(1) Before troubleshooting, check the followings: 1 Check the power supply voltage.2 Check the indoo

116-3. Trouble shooting(1) In case of being indicated irregularity on the self diagnosesMis-wiring680051025101Indoor-outdoorsignal errorWiring betwe

12(2) Other case Not working of remote controller switch ON/OFFShort circuit the protecting parts in the Indoor controller board.Trouble of the Indoor

13YesNoNoYesYesNoYesNoYesNoNoYesCheck code : 6800Indoor controller board is defective.Connection is defective.Error was found in the signal transmitte

14YesNoYesNoNoYesYesNoMeasure the resistance of the pipe temperature thermistor / liquid.Indoor controller board is defective.Check the pipe temperatu

156-4. Test point of indoor controller boardIndoor controller board•Room temperature thermistor (RT11)•Pipe temperature thermistor/liquid (RT12)•Conde

166-5. Trouble criterion of main partsSEZ-A12AR.TH SEZ-A18AR.TH SEZ-A24AR.TH BLK REDGRNYLWORNYLWBLUBRNWHTPRoom temperaturethermistor(RT11)Condenser/

17DISASSEMBLY PROCEDURE71. Removing the electrical parts(1) Remove the 2 screws and the electrical parts cover.(See Photo 1.)● Indoor controller board

184. Removing the room temperature thermistor (RT11)(1) Remove the electrical parts cover.(Refer to 1.)(2) Remove the front panel at fan side. (12 scr

196. Removing the drain pan(1) Unscrew each set screw on the right and left, and remove the drain pan pushing it toward the the back.(See Photo 1.)P

21PART NAMES AND FUNCTIONSIndoor UnitSEZ-A12AR.TH SEZ-A18AR.TH SEZ-A24AR.TH Air outlet duct flangeAir outletAir inlet(Selecting the either back side

20PARTS LIST8No.Parts No.Parts nameSpecificationRemarksUnitAmountWiringDiagramSymbolRecom-mendedQ'tyQ'ty/setPrice123456789101112131415LEFT S

LN3NN32TO OUTDOORUNITPOWERSUPPLYTO REMOTECONTROLLER21No.Parts No.Parts nameSpecification250/3.15A4P3P2PRemarks(Drawing No.)UnitAmountWiringDiagramSymb

229OPTIONAL PARTS9-1. REFRIGERANT PIPESThe air conditioner has flared connections its indoor and outdoor sides.Please use the optional extension pipe

OC303-1.qxp 04.3.17 11:52 AM Page 23

HEAD OFFICE : MITSUBISHI DENKI BLDG., 2-2-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPANCCopyright 2004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD.Dis

3Caution● Only the Power display lights when the unit is stopped and power supplied to the unit.● When the central control remote control unit, which

42SPECIFICATIONSSEZ-A12AR.TH SEZ-A18AR.THIndoor modelFunctionPower supplySingle phase230V, 50Hz780/600100.2133—0.21 PK6V19-EF1100o270o70033.5135/30 77

5SEZ-A24AR.THIndoor modelFunctionPower supplySingle phase230V, 50Hz1200/720200.3464—0.34 PK6V50-EF1100o270o70033.5143/32 890/6603101010PAR-20MAACoolin

690807060504030201063 125 250 500 1000 2000 4000 8000APPROXIMATETERESHOLD OFHEARING FORCONTINUOUSNOISENC-60NC-50NC-40NC-30NC-20NC-70OCTAVE BAND SOUND

7OUTLINES AND DIMENSIONS3SEZ-A12AR.THSEZ-A18AR.THSEZ-A24AR.TH42 930Terminal block3/8Fflared connection[9.52mm[6.35mmflared connection1/4FSEZ-A24ARSEZ-

84WIRING DIAGRAMSEZ-A12AR.THSEZ-A18AR.THSEZ-A24AR.THFOR A18/24 (1:1 SYSTEM)OR MULTI SYSTEMFOR A12(1:1 SYSTEM)X5X4X2REMOTE CONTROLLER BOARDR.BRT12RT11I

9REFRIGERANT SYSTEM DIAGRAM5Pipe temperature thermistor/liquid (RT12)Distributorwith strainer#50Condenser/evaporator temperature thermistor(RT13)Room