- If the inverter shows oC3, first restart the compressor if the error still shows.
2. If it still shows, then need to check the inverter. Remove off U, V, W wires from the inverter, press PRG, show P0, enter, show P0.00, change into P0.01, enter, show 0, change into 2, enter, press PRG and start the compressor, check if the controller shows error. If it shows then the inverter is broken.
3. If check the inverter is not broken, then need to check the motor and air end.
