Grid relay sticking

What does 457 mean?

The internal grid connection relay is physically stuck or failing to operate correctly, preventing the inverter from safely connecting or disconnecting from the grid. Consequently, the inverter is not feeding any energy.

• Mechanical failure of the grid relay contacts
• Control circuit malfunction preventing proper relay switching

Click steps to track your progress.

1. 1

   If this status code is displayed all the time, notify a Fronius-trained service engineer.