Insulation fault

What does 447 mean?

An insulation fault has been detected within the inverter or its connected circuits, meaning there is an unintended electrical path to ground. This is a critical safety issue, and the inverter will stop feeding energy into the grid.

• Degradation or damage to wiring insulation (AC or DC side)
• Moisture ingress into the inverter or connections
• Internal component failure leading to a ground fault

Click steps to track your progress.

1. 1

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