01
Overvoltage Error
Mitsubishi Electric · Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit
What does 01 mean?
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.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Inspect the power circuit board for any visible damage or component failure.
Source: Mitsubishi PUZ-HA30-36NHA4 Outdoor Unit
Open Manual (Page 68)