O General Ac Error Code 9c !new! -

When this code appears, the system typically shuts down to prevent hardware damage. It is most common following a repair where one of the PCBs was replaced with a part that isn't an exact match for the other unit's software. Steps to Resolve the 9C Error To troubleshoot and fix this issue, follow these steps: Verify Model Compatibility

: If "9C" remains on the screen permanently, the system has entered its manual installer configuration or diagnostic test loop.

Look for loose terminals, burnt wires, or signs of corrosion. Re-seat any loose plugs firmly. 5. Check the Heat Sink Paste (Technician Only)

: When the power is turned on or the unit is reset, "9C" will flash on the remote display for several seconds while the indoor unit establishes connection parameters. This is normal, and it should disappear to show the clock screen.