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LG System air conditioners error codes

Official LG support guidance for ceiling-mounted and multi-room system air conditioners where CH codes may reflect communication or operating-mode conflicts.

Based on LG USA support pages covering ceiling-mounted and system air conditioners; breaker layout, display style, and wiring arrangements can vary by installation.

Ceiling-mounted system air conditionersMulti-room system air conditioners

Brand

LG

Model series

System air conditioners

Guides in this series

2

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CH05

The indoor and outdoor units are not communicating, often because the outdoor unit has lost power.

CH07

Units connected in the same system are running in conflicting operating modes.

More LG model series

Wall-mounted split systems

4 guides

Wall-mounted inverter split air conditioners, 2-in-1 heating and cooling air conditioners.

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