Fronius Symo Hybrid Inverter Code 463 — Reversed AC polarity, AC connector inserted incorrectly

What does 463 mean?

The inverter has detected reversed AC polarity, likely due to the AC connector being inserted incorrectly during installation or maintenance. This critical error prevents the inverter from feeding energy into the grid.

• Incorrect AC wiring polarity
• AC connector improperly inserted or damaged

Click steps to track your progress.

1. 1

   Immediately power down the inverter by disconnecting AC and DC.

2. 2

   Carefully check the AC connector for correct insertion and ensure polarity is not reversed according to wiring diagrams.

3. 3

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