303 Power stage set over temperature - Inverter internal temperature is too high.

What does 303 mean?

The inverter briefly interrupted grid power feed operation because its power stage set became too hot. The inverter will return to its startup phase and attempt to cool down.

• Internal components of the inverter are operating at an excessively high temperature.
• Restricted airflow due to dirty vents or cooling elements.

Click steps to track your progress.

1. 1

   Check that the inverter's cool air vents and cooling elements are not blocked.

2. 2

   Carefully clean any dust or debris from the vents using compressed air if necessary.

3. 3

   The fault should rectify automatically as the inverter cools down. If the code recurs, contact your system installer.