Software problem

What does 431 mean?

An internal software error or corruption has occurred, preventing the inverter from feeding energy into the grid. This requires specific actions to reset or update the software.

• Corrupted inverter firmware
• Software bug or malfunction
• Unexpected system state due to software logic

Click steps to track your progress.

1. 1

   Perform an AC reset by switching the automatic circuit breaker off and on again.

2. 2

   Update inverter firmware to the latest version.

3. 3

   If this status code is displayed all the time, notify a Fronius-trained service engineer.