Wall-mounted split systems code list
Family-scoped air-conditioner codes with the shortest useful meaning line for quick triage.
CH05
Communication between the indoor and outdoor units is unstable or interrupted.
On applicable wall-mounted models, the code may appear as CH05 on the display or be represented by the indoor-unit indicator blinking pattern described by LG for wall-mounted air conditioners.
CH38
The air conditioner may be low on refrigerant.
The fault may appear as CH38 or, on some models, as F4.
CH10
The indoor unit fan has a fault or is not operating normally.
The fault may appear as CH10 or E6 depending on model.
CH93
Communication between indoor and outdoor units is failing, often during test run or when outdoor power is missing.
The code appears as CH93 on compatible models; on some newer installations it may be tied to separate power feeds for indoor and outdoor units.