Mitsubishi Electric · PUZ-HA30/36NHA4 Outdoor Unit
An abnormality is detected in the power synchronous signal, which is crucial for the controller circuit board to synchronize with the incoming power frequency. A faulty signal can lead to unstable operation of power components and incorrect timing control.
Click steps to track your progress.
Inspect the controller circuit board for any visible damage or component failure.
Check the connections related to power sensing on the controller circuit board.
Verify the stability and frequency of the incoming power supply.