Fault Codes / LG / CH40

LG

LG CH40

Critical

Multi V / Split — Inverter AC current abnormal (CT sensor).

LG CH40: Inverter AC current abnormal (CT sensor). This fault typically halts operation and needs immediate attention.

Possible causes

Compressor overload / winding / current transformer.

Check steps

Measure winding (~1–4 Ω) & insulation (≥50 MΩ), check run current.
Check inverter outputs.

Affected parts

Verdichter
Inverter-PCB

Safety note

High voltage! Let capacitors discharge.

Source: LG Air Conditioning Fault Codes (offiziell, LG Electronics)

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

Look up in Enthalio →

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