DC module overtemperature

What does 303 mean?

This code indicates that the DC module within the inverter has reached an excessively high temperature. This leads to a short-term interruption in energy feeding, after which the inverter will resume its startup routine once temperatures normalize.

• Insufficient cooling due to blocked cooling air openings or a dirty heat sink.
• High ambient temperatures exceeding the inverter's operating limits.
• Internal fan malfunction or failure.

Click steps to track your progress.

1. 1

   Clean and purge all cooling air openings and the heat sink of the inverter to ensure proper airflow.

2. 2

   Verify that the inverter's installation location allows for adequate ventilation and is not exposed to excessive heat sources.

3. 3

   Inspect internal cooling fans for proper operation and any obstructions.