Error 7 (Binary 0111) — RS transmission buffer overflow

What does 7 mean?

The Fronius Solar Inverter's RS (serial) transmission buffer has overflowed, indicating too much data being sent for its capacity. This is indicated by LEDs 1, 2, 4, 8, and the State LED all lighting up steady red, with LEDs 1, 2, and 4 specifically illuminated for the binary code.

• Excessive data transmission
• Communication speed mismatch

Click steps to track your progress.

1. 1

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

2. 2

   Verify that communication settings are correct for any connected external devices.

3. 3

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