Before performing technical checks, isolate the main power source by . Wait at least 10 to 15 minutes to fully discharge residual electrical energy stored inside the inverter's high-capacity capacitors.
: A locked rotor, shorted motor windings, or electrical degradation within the outdoor DC fan motor prevents the board from regulating voltage. o general ac error code 9c
Is the indoor unit fan , or is the whole system dead? Before performing technical checks, isolate the main power