Fault Codes / LG / CH07

High

Operation mode mismatch – all indoor units must be in same mode.

Possible causes

• Indoor units in different modes (cool/heat).
• Wrong master/slave setting.

Check steps

• Set all indoor units to same mode.
• Define master indoor unit.

Affected parts

• Kein Ersatzteil — Einstellung/Konfiguration prüfen (DIP, Menü, Untercode)

Safety note

Source: LG resmi servis kılavuzu — LG official support article (lg.com/us support help-library 'LG Air Conditioner Guide to Error Codes' and lg.com/ca_en CH07 article, corroborated by beaconsaves.com): CH07 = on multi-zone/paired LG systems, the connected indoor units are set to different/conflicting operating mod…

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

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