LG multi-zone — LG multi-split systems where several indoor units share one outdoor unit Error Codes Directory
Complete diagnostic reference for LG multi-zone — LG multi-split systems where several indoor units share one outdoor unit fault codes. Each code includes official root causes, safety precautions, and affected replacement components.
LG CH07 error code: indoor units set to conflicting modes
LG shows CH07 on a multi-split when the indoor units connected to one outdoor unit are set to modes that cannot run at the same time, such as one head in heating and another in cooling or dehumidification. It is a setting conflict, not a hardware fault, and it clears when every head is set to a compatible mode. Applies to: LG multi-split systems where several indoor units share one outdoor unit This applies to LG multi-split systems where more than one indoor unit shares a single outdoor unit. A single-split system with one indoor and one outdoor unit does not produce CH07 for this reason, so confirm the system is a multi-split first. Owner-safe checks: Check the mode shown on every indoor remote for units sharing the outdoor unit, and set them all to heating or all to cooling. | After the modes match, turn the affected heads off and on again and confirm CH07 has cleared. Qualified technician: If CH07 stays after every head is confirmed on the same mode, a wired controller or communication fault may be reporting a mode incorrectly, which needs an LG technician.