516 Communication with memory unit not possible - Memory unit communication fault.

What does 516 mean?

A warning message indicates that the inverter cannot communicate with its internal memory unit. This can lead to data loss or incorrect operation.

• Faulty memory unit.
• Internal communication bus error.
• 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.