Model reference

LG LCU380CP

Air Conditioner

1 document30 error codes2 service modes

Available documentation

Service Manual

LG Ceiling Cassette Air Conditioner SERVICE MANUAL64 pg
Covers this model

MyPros+ Max

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M+ Max·LG Air Conditioner

01 on my LG LCU380CP

M+

Indoor room thermistor error

From Service Manual 829851, p.23:

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 (30)

CodeMeaning

01Indoor room thermistor error (open/short circuit or internal circuit error)02Indoor in-piping thermistor error (open/short circuit or internal circuit error)03Remote controller communication error (open/short or wrong connection on wired…04Drain pump / float switch error (float switch open, normal is short)05Communication error between indoor and outdoor units 06Indoor out-piping thermistor error (open/short circuit or internal circuit…21DC Peak (IPM Fault)22CT2 (Max CT) error 23DC Link Low Voltage 24High/Low Pressure or Heatsink Switch open 25Low Voltage / Over Voltage on input (below 140VAC or above 300VAC)26DC compressor position error 27PSC Fault Error 28DC Link High Voltage 32Discharge pipe temperature high for inverter compressor (105°C threshold…33Discharge pipe temperature high for constant compressor (105°C threshold)40CT Sensor open/short 41Inverter discharge pipe thermistor error (open/short)44Outdoor air thermistor error (open/short)45Condenser pipe thermistor error (open/short)46Suction pipe thermistor error (open/short)47Constant discharge pipe thermistor error (open/short)51Capacity error 53Signal error between indoor and outdoor (displayed at outdoor unit, same issue…54Phase error 60EEPROM check sum error 61Condenser pipe sensor detected high temperature (65°C threshold)62Heat sink sensor detected high temperature (85°C threshold)63Condenser pipe low temperature 65Heatsink thermistor error (open/short)

Service modes (2)

Child LockPress Timer key and Min key simultaneously on the wired remote controller.
Test RunPress the room temperature checking button and down timer button simultaneously for 3 seconds on…

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

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