456 Anti-islanding function stopped - Safety function malfunction.

What does 456 mean?

The inverter's anti-islanding safety function, which prevents it from feeding power when the grid is down, has stopped running properly. This is a critical safety fault.

• Software problem.
• Internal hardware failure related to grid monitoring.

Click steps to track your progress.

1. 1

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

2. 2

   Observe if the inverter attempts to restart and the code clears.

3. 3

   If this status code persists, contact a Fronius-trained service technician, as this is a critical safety function.