Mitsubishi DX-PC3 Service Manual

SSEERRVVIICCEE MMAANNUUAALL FFDDAA SSeerriieess SSpplliitt SSyysstteemmss FFDDAA SSeerriieess MMuullttii SSyysstteemmss

- 8 -CNM352X6 52X1 52X2 52X352X452X8-2PC3IC2C2X1CNEF2F1Z2DZ3DZ4DZ5DR16ZD1CNJD2IC7TVS1CNM2CNW8CNTIC9J81234J10J11J12CNRIC12CNG LED2 LED1CNW9C13PC5C12C1L

- 9 -CNW1CNJ2CNM3CNRCNVLED1LED2CNB CNW2KN152X552X352X252X252X652X452X8-252X8-152X7L3F1ZNRCNW0CNM1L2L1C57CNQ CNTCNH CNN1SW2 SW5CNESW8SW7SW9SW10IC8IC7PC

- 10 -Heat exchanger thermistor(Thl-R2)Remote controllerPCB power supplyconnector(Primary side)PCB power supplyconnector(Secondary side)Fan motorConne

- 11 -CNTCNVCNOCNHCNFCNBCNQCNN1CNN2SW2 SW10SW5 SW7SW9SW8CNZ CNICNOCNAF3F2CNK2CNK1CNW2CNGCNECNW0CNW1CNM352X352X5 52X452X2 52X1 52X6L3L2L1L4CNJ2 CNRF1LE

- 12 -1Error display : No displayLCD display : No display[Power supply line error]Indoor unitRed LEDGreen LEDStays OFFStays OFFRed LEDGreen LEDStays

- 13 -Indoor unitGreen LEDRed LED 3 time flashKeeps flashingOutdoor unitGreen LEDRed LED Stays OFFKeeps flashingOKRemote controller wiring connect che

- 14 -2Error display “ WAIT ”Indoor – outdoor communications trouble (Initial (when the power is turned on)Indoor unitRed LEDGreen LEDStays OFFKeeps

- 15 -3Error display : e1[Communication error between remote controller~Indoor unit]Indoor unitRed LEDGreen LEDStays OFFKeeps flashingStays OFFKeeps

- 16 -4Error display : e6[Defective indoor unit heat exchanger thermistor]5Error display : e7[Detective return air thermistor]Indoor unitRed LEDGre

- 17 -7Error display : e9[Drain trouble]Indoor unitRed LEDGreen LED1 time flashKeeps flashingRed LEDGreen LEDStays OFFKeeps flashingOutdoor unitCorre

- 18 -8Error display : e10[Control of 1 remote controller VS multiple units Excessive number of units (more than 17 units) ]Indoor unitRed LEDGreen

- 19 -NONOAbnormal data checkwith remote controllerAfter check reset,fan runs on Me.Check the circumstances.Was it reproduced?Fan ON?NONONONONONOYESYE

- 20 -10Error display : e28[Directive remote controller thermistor.]Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LEDGreen LEDStays OFFKeeps

- 21 -(4) Error diagnosis procedures at the outdoor units sideAt the error diagnosis related to the outdoor unit, check at first the error code of rem

- 22 -WCNIF2T8CNCNQCNECNI3CNWCNI2CNV1CNMF3T1T5T4T2F1CNL CNTRSW6SW7T7T6VUOutdoor air temp. thermistor,Outdoor heat exchanger themistor,Discharge pipe t

- 23 -C6C5L6L5C7C13IC12L7C6C8L8L10C9C10SW6SW2KN1CNM1CNECNA2X04 X03 X02X07 X05 X01 X06CNM2CNM3CNS CNOCNRCNP3CNP1CNP2CNA1CNV1CNWC3KN2CNM4LED-RLED-GSW4SW

- 24 -LNETBTBRedWhiteY/NGLED1RedT1 T5RedWhiteBlackOrangeYellowUVWT6 T7 T8CMF2 (250V 20A)CnTRControl PCBPower transistor moduleCNI3 T2 T46DC280VF3 (250

- 25 -1Error display : e5[Communications error during operation]Indoor unitRed LEDGreen LED2 time flashKeeps flashingRed LEDGreen LED2 time flashKee

- 26 -3Error display : e33[Inverter primary current abnormal] [Only case of 151~251 type]Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LED1

- 27 -4[Open phase at L3 phase of 52C secondary side] (Only case of 301~601 type)Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LEDGreen LED1 t

MITSUBISHI HEAVY INDUSTRIES - PAC SERVICE MANUAL INDEX MAINTENANCE DATA 2 ERROR CODES 4 PCB INDOOR UNITS 8 ERROR DISPLAY

- 28 -7[Defective outdoor unit heat exchanger thermistor]Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LEDGreen LED1 time flash Keeps flashing

- 29 -3004002001000304020100---50050Temperature [T](°C)T < 0°CT > 0°CIs the outdoor air temperature thermistorconnector connectionOK?RepairNONOY

- 30 -Error display : e40Is the powersupply voltageproper?• Is the installation space for the indoor and outdoor units proper?• Is there a short cir

- 31 -12Error display : e47[Inverter over-voltage trouble] (Only case of 151~251 type)Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LED1 tim

- 32 -15[Power transistor thermistor faulty.] (Only case of 151~251 type)Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LED1 time flashOutdoor

- 33 -Indoor unitRed LEDGreen LEDStays OFFKeeps flashingRed LED1 time, 2 time, 3 time flash Outdoor unitNO NONONGYESCheck of power supplyReplacementco

- 34 -Compressor operationReplacement control PCBNormalNONONOYESYESYESIs the power transistor module cracked or burnt?Is there a short circuit between

- 35 -(4) Check abnormal operation data with the remote controllerOperation data are recorded when there is an abnormal state and these data can be di

- 36 -2OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER(1) Remote controller(a) Wired remote controllerThe figure below shows the remote controller with

- 37 -(2) Setting functions using the remote controller(a) The factory settings of this unit's functions are as follows: If you want to charge a

- 2 -1. MAINTENANCE DATA1.1 Servicing(1) EvacuationThe evacuation is a procedure to purge impurities, such as noncondensable gas, air, moisture from t

- 38 -(b) Function setting method1) Stop the air conditioner2) Press the SET and MODE buttons simultaneouslyfor 3 seconds or longer.The screen display

- 39 - When “I/U FUNCTION ” is selected.1 The screen display will be switched as follows:“ I/U SELECT” “ SET” “I/U No.00” (blinking)2 Press either

- 40 -12Function No. A (Example) If the upper limit is set at 28˚CFunction Contents B Setting Contents CTEMP RANGE SETDISP CHANGENO DISP CHANGEControl

- 41 -(3) Cooling Test Operation ProcedureCarry out the following test operation procedure using the remote controller.(a) Starting the Cooling Test O

- 42-CoolingHeatingGas operation valve charge portSuction pressure (low pressure)Discharge pressure (high pressure)Check joint in the unitDischarge pr

- 43 -Romote controller signal receiving partBackup switchCheck monitor(Error code display E1~E60)Operation display light (Green) • Lights continously

- 44 -MODE TEMP ON/OFFAIR FLOW FILTERFAN SPEEDSETTIMEACLTIMERAUTO COOL DRY FAN HEATFILTER°CAMPMONAMPMOFFFAN HI ME LO(c) Wireless remote controllerO

NOTICE The installation of this equipment must comply with all NATIONAL, STATE and LOCAL CODES. This Service Guide does not cover

- 3 -(2) Refrigerant charging(a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder.(b)

- 4 -(1) Selfdiagnosis function(a) Check Indicator TableWhether a failure exists or not on the indoor unit and outdoor unit can be know by the content

- 5 -Outdoor unit LEDIndoor unit LEDGreenKeeps flashingKeeps flashingKeeps flashingKeeps flashingKeeps flashingKeeps flashingKeeps flashingKeeps flash

- 6 -Section Display sectionError code of remote controllerInspection LED (red) of indoor unit PCBInspection LED (red) of outdoor unit PCB• Displays t

- 7 -4) Recording and reset of errorNotes (1) Priority is in the order of E1 > ... > E10 > ... > E60.(2) Procedures of trouble diagnosi