Error 400 - Overheat caused by contact failure on IPM of Inverter PBA2

What does 400 mean?

Inverter PBA2 is overheating due to a contact failure on its Intelligent Power Module (IPM), preventing proper heat dissipation.

• Poor thermal contact between the IPM and heatsink
• Faulty IPM
• Insufficient cooling around Inverter PBA2

Click steps to track your progress.

1. 1

   Power off the unit immediately and allow it to cool completely.

2. 2

   Inspect the contact area of the IPM on Inverter PBA2 for any visible issues (e.g., degraded thermal paste, loose mounting).

3. 3

   Professional service is highly recommended for this error to safely address the IPM contact and cooling.