O General units are sensitive to power surges. Using a high-quality stabilizer protects the delicate PCB and EEV.
On some O General wired remotes, you can enter "Function Selection" mode to check if the unit is accidentally set to a mode it doesn't support (like an external pump setting that isn't connected). ⚠️ When to Call a Professional o general ac error code 9c
: If wiring appears intact, the issue may lie within the PCB itself. Modern inverter units are programmed with specific model codes; if a board has been replaced recently with a non-identical version, it may result in a mismatch error that mimics communication failures. O General units are sensitive to power surges