479 Intermediate circuit voltage relay switched off - Internal relay preventing operation.

What does 479 mean?

The relay for the intermediate circuit voltage has switched off. The inverter will automatically attempt to reconnect to the grid and resume feeding energy.

• Temporary internal protection trip.
• Grid anomaly.
• An internal hardware issue with the relay.

Click steps to track your progress.

1. 1

   Allow the inverter to automatically attempt to connect again and resume operation.

2. 2

   Perform an AC reset by switching the automatic circuit breaker for the inverter off and then on again if it doesn't recover.

3. 3

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