Mitsubishi Electric · Air Conditioners
The indoor unit's upper lamp blinks 9 times and the outdoor P.C. board LED blinks 9 times. This indicates that each phase current of the compressor cannot be detected normally.
Click steps to track your progress.
Turn off the power to the air conditioner at the circuit breaker.
Reconnect the compressor's connector to ensure a proper connection.
Restore power and attempt to run the unit.
If the error continues, a qualified technician should check the inverter/compressor system.