452 Communication problem between processors - Internal communication failure.

What does 452 mean?

There is a communication problem between the internal processors within the inverter. This can prevent proper operation and grid power feed.

• Internal hardware communication failure.
• Software glitch.
• Faulty processor.

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 reconnect and the code clears.

3. 3

   If this status code persists, contact a Fronius-trained service technician.