Mitsubishi Electric · PUZ-HA30/36NHA4 Outdoor Unit
The power circuit board has detected an overvoltage condition in the input power supply. This condition indicates that the incoming voltage exceeds safe operating limits, posing a risk of damage to sensitive electronic components if not corrected.
Click steps to track your progress.
Measure the input power supply voltage at the main terminals to verify the actual voltage level.
Check the external power supply for stability and correct voltage output.
Inspect the power circuit board for any visible damage or component failure.