Software problem

What does 431 mean?

This code indicates a software problem within the inverter, which prevents it from feeding energy into the grid. This could be due to a corrupted operating system, an unexpected program state, or a bug.

• Corrupted inverter firmware or software.
• Unexpected software execution state.
• Incompatible software version with the hardware.

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 the inverter firmware to the latest version available from the manufacturer's website (e.g., http://www.fronius.com).

3. 3

   If the issue persists, notify a Fronius-trained service engineer.