Model reference

LG LC097HV4

Air Conditioner

1 document34 error codes4 service modes

Available documentation

Service Manual

Air Conditioner Service Manual90 pg
Covers this model

MyPros+ Max

Diagnose your LG LC097HV4.

Step-by-step diagnostics from the service manual
Test values, resistance specs, and wiring references
Verified part numbers when replacement is needed

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M+

M+ Max·LG Air Conditioner

01 on my LG LC097HV4

M+

Indoor room air temperature sensor

From Service Manual 673478, p.50:

1.Access service mode to confirm the active fault code and read stored error history.

2.Disconnect the sensor and measure resistance. Expected: 10 kΩ to 12 kΩ at 77°F (25°C).

3.Check the sensor harness for opens. A reading outside 5 kΩ to 50 kΩ indicates a failed sensor.

Part 6322FR2046G

Temperature thermistor

Error codes (34)

CodeMeaning

01Indoor room air temperature sensor error (open/short).02Indoor inlet pipe temperature sensor error (open/short).03Wired remote controller communication error.04Drain pump / float switch error.05Communication error between indoor and outdoor units (displayed at indoor unit).06Indoor outlet pipe temperature sensor error (open/short).09EEPROM checksum error (indoor unit).10Indoor BLDC fan motor lock error.21DC Peak / IPM Fault 22Max CT (CT2)23DC Link voltage abnormal 24Pressure switch / heatsink error.25Abnormal input voltage (below 140Vac or above 300Vac).26DC compressor position / starting fail error.27PFC Fault 29Inverter compressor over-current 32High temperature in discharge pipe of the inverter compressor.35Low pressure error 39Transmission error between PFC Micom and INV Micom on outdoor inverter PCB.40CT sensor error (open/short)41Inverter discharge pipe thermistor sensor error (open/short).43High pressure sensor error (open/short).44Outdoor air temperature thermistor sensor error (open/short).45Condenser middle pipe thermistor sensor error (open/short).46Suction pipe thermistor sensor error (open/short).48Condenser out-pipe thermistor sensor error (open/short).51Over capacity 53Communication error between indoor and outdoor units (displayed at outdoor…60EEPROM access/checksum error on outdoor inverter PCB and main PCB.61High temperature in outdoor condenser pipe.

View all 34 error codes

62Heatsink high temperature error 65Heatsink temperature sensor error (open/short) on inverter PCB.67Outdoor BLDC fan motor lock error 73AC input instant over-current error (software-detected)

Service modes (4)

Forced OperationPress the ON/OFF button on the main unit of the appliance (used when remote control is lost).
Installer Setting Mode (Deluxe/Picto Wired Remote)Press and hold the setting button for 4 seconds until timer segment displays '01:01'
Installer Setting Mode (Standard Wired Remote)Press the OPER MODE button and FAN SPEED button simultaneously for more than 3 seconds.
Pump Down Mode1

Full entry steps, exit procedures, and test sequences are available in Max.

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