Model reference

LG LAN090HYV1

Air Conditioner

2 documents36 error codes2 service modes

Available documentation

Service Manual

Room Air Conditioner SVC MANUAL(Exploded View)8 pg
Covers this model
Air Conditioner Service Manual184 pg
Covers this model

MyPros+ Max

Diagnose your LG LAN090HYV1.

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Test values, resistance specs, and wiring references
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M+

M+ Max·LG Air Conditioner

CH01 on my LG LAN090HYV1

M+

Indoor unit room temperature sensor

From Service Manual 899941, p.33:

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 (36)

CodeMeaning

CH01Indoor unit room temperature sensor open/short error.CH02Indoor unit inlet pipe sensor open/short error.CH03Wired remote control communication error.CH04Float switch error (optional drain pump/float switch fault).CH05Communication error between indoor and outdoor units.CH06Indoor unit outlet pipe sensor open/short error.CH09Indoor unit EEPROM error (option PCBA poor connection).CH10Indoor unit BLDC motor fan lock (faulty motor operation).CH12Indoor unit middle pipe sensor open/short error.CH21DC Peak / IPM Fault CH22AC input current is higher than the limit (Max CT).CH23DC Link voltage low or high.CH26DC compressor position error.CH27PSC Fault CH29Compressor phase over-current.CH32High temperature in discharge pipe of the inverter compressor.CH34High pressure sensor reading is high.CH35Low pressure sensor reading is low.CH36Refrigerant leakage detection.CH37Exceed the compression ratio limit.CH38Refrigerant leakage detection (alternate code for CH36).CH40Inverter CT sensor open/short CH41Inverter discharge temperature sensor open or short.CH42Low pressure sensor open/short.CH43High pressure sensor open/short.CH44Outdoor air temperature sensor open or short.CH45Outdoor heat exchanger (condenser middle pipe) sensor open or short.CH46Compressor suction temperature sensor (S-Pipe) open or short.CH48Outdoor sensor (condenser middle pipe) open or short (alternate designation).CH51Excess capacity

View all 36 error codes

CH53Communication error between indoor and outdoor units.CH61High temperature in condenser pipe.CH62High temperature in outdoor PCBA heat sink.CH67Outdoor BLDC motor fan lock (faulty motor operation).CH72Detect 4-way valve transfer failure.CH93Communication error between indoor and outdoor units (alternate code).

Service modes (2)

Forced Operation (Manual Operation without Remote Control)["Press the ON/OFF button on the display PCB or side of indoor unit to start operation."]
Test Run Mode["Method 1

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

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