Error 11 (Binary 1011) — Parity error or stop bit error (frame check)

What does 11 mean?

The Fronius Solar Inverter has detected a data integrity error during communication, specifically a parity or stop bit error. This is indicated by LEDs 1, 2, 4, 8, and the State LED all lighting up steady red, with LEDs 1, 2, and 8 specifically illuminated for the binary code.

• Poor communication signal quality
• Incorrect communication settings
• Faulty communication hardware

Click steps to track your progress.

1. 1

   Observe the inverter for a few minutes to see if the error clears automatically.

2. 2

   Check communication cable connections and ensure they are properly shielded.

3. 3

   If the error persists, contact a Fronius-trained service engineer to check communication parameters and hardware.