Fault Codes / LG / CH53

Multi V / Split — Communication error indoor ↔ outdoor unit.

Possible causes

• Interconnect wiring wrong/faulty.

Check steps

• Check wiring; voltage N→3 (0–65 V DC) or Multi V terminals 3-4 (4 V DC).
• Restart both units.

Affected parts

• Verbindungsleitung

Safety note

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

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

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