Model reference

LG LM-2421C2L/A2L

Name: LG LM-2421C2L/A2L
Brand: LG

Air Conditioner

2 documents3 error codes3 service modes

Available documentation

Multi Type Room Air Conditioner SERVICE MANUAL56 pg
Covers this model
Multi Type Room Air Conditioner SVC MANUAL (Exploded View)53 pg
Covers this model

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1 on my LG LM-2421C2L/A2L

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Indoor suction temperature thermistor

From Service Manual 904775, p.27:

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

CodeMeaning

Auto Restarting Operation["Set the slide switch on the main unit to the 'Auto Restarting' position.","When power is restored…
Cable Mis-connection Check["Press the forced operation key for more than 3 seconds.","If cables between indoor and outdoor…
Forced Operation["Set the slide switch on the main unit to the 'Forced Operation' position.","Supply power to the…

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

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