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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Inverter Board
Main Board
CONNECTOR No. SPEC DESCRIPTION
CN1 POWER AC POWER
CN2 DC-LINK DC LINK VOLTAGE DETECT
CN3 WRITE ON BOARD WRITING
CN4 H/P, M HIGH PRESSURE MAGNETIC SWITCH
CN5 PHASE 3 PHASE DETECT
CN6 SIGNAL TRANXMISSION WITH CONTROL BOARD
CN10, 11, 12 IPM PWM SIGNAL
CN13 IPM PWM CONTROL POWER
CONNECTOR No. SPEC DESCRIPTION
CN01 AC POWER IN AC POWER
CN02 AC TRANS IN AC POWER TO TRANS
CN03 AC TRANS OUT AC POWER FROM TRANS
CN04 4WAY 4WAY REVERSING VALVE
CN05 LIQ(I) NVERTER COMP LIQUID INJECTION VALVE
CN06 LIQ(C) CONSTANT COMP LIQUID INJECTION VALVE
CN07 HEATER(I) INVERTER COMP CRANK HEATER
CN08 HEATER(C) CONSTANT COMP CRANK HEATER
CN10 HOT-GAS HOT GAS BYPASS VALVE
CN11 OILPASS(I) NOT USE
CN12 OILPASS(C) NOT USE
CN14 MAGNET(C) MAGNETIC SWITCH
CN15 COOLING FAN HEATSINK FAN
CN16 EEV-OUT LINEAR EXPANSION VALVE(MAIN)
CN17 EEV-SC LINEAR EXPANSION VALVE(SUBCOOLING CIRCUIT)
CN18 TO-JIG TRANSMISSION WITH JIG
CN19 CEN-CONTROL/WRITE TRANSMISSION WITH CENTRAL CONTROLLER
CN20 TO FAN BOARD TRANSMISSION WITH FAN BOARD
CN21 TO INVERTER BOARD TRANSMISSION WITH INVERTER BOARD
CN22 TO INDOOR UNIT TRANSMISSION WITH INDOOR UNIT
CN23 TO SUB OUTDOOR TRANSMISSION WITH SUB OUTDOOR UNIT
OUT-AIR OUTDOOR AIR THERMISTOR
CN25 S_PIPE(I) INVERTER COMP SUCTION PIPE THERMISTOR
D_PIPE(C) CONSTANT COMP DISCHARGE PIPE THERMISTOR
D_PIPE(I) INVERTER COMP DISCHARGE PIPE THERMISTOR
CN26 HEX_PIPE(C) CONDENSOR PIPE THERMISTOR(C)
HEX_PIPE(I) CONDENSOR PIPE THERMISTOR(I)
SC-OUT SUBCOOLING CIRCUIT OUTLET PIPE THERMISTOR
CN27 SC-IN SUBCOOLING CIRCUIT INLET PIPE THERMISTOR
SC-L SUBCOOLING CIRCUIT LIQUID PIPE THERMISTOR
CN28 P-SEN(H) HIGH PRESSURE SENSOR
CN29 P-SEN(L) LOW PRESSURE SENSOR
JIG 1 JIG JIG POWER
JIG 2 JIG JIG POWER
CN36 EEV-HOUT LINEAR EXPANSION VALVE(MAIN)
CN24 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL)
CN34 DRY CONTACT OPERATING MODE LOCKING(COOL, HOT ,GENERAL)
Wiring Diagrams
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