Fronius Symo Hybrid Inverter Code 475 — Insulation fault (solar module or ground)

What does 475 mean?

An insulation fault has been detected, indicating a problematic connection between a solar module and the ground. This safety measure prevents the inverter from feeding any energy into the grid.

• Damaged insulation on PV cables
• Moisture ingress in PV modules or connectors
• Grounding issue in the PV array

Click steps to track your progress.

1. 1

   Immediately power down the inverter (AC and DC disconnect).

2. 2

   Visually inspect all PV module cables and connections for any signs of damage or moisture.

3. 3

   If this status code keeps recurring, contact your system engineer for professional insulation testing and repair.