515 No internal communication with filter - Internal communication fault.

What does 515 mean?

A warning message appears on the display, indicating that there is no internal communication with the filter unit. This can affect inverter performance.

• Internal communication bus error.
• Faulty filter board.
• Loose internal connection.

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.