450 No guard found - Internal safety component missing or faulty.

What does 450 mean?

This indicates that an internal safety component, referred to as a "guard," is either missing or not functioning correctly within the inverter. This prevents proper operation.

• Internal hardware component failure.
• Incorrect internal wiring.

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.