Fac-Bfr / Fac-Srr - AC grid frequency out of range

What does Fac-Bfr, Fac-Srr mean?

The frequency of the AC grid is outside the acceptable operating range. The Sunny Boy assumes the public grid is down and disconnects from the grid to prevent 'islanding'. This is a disturbance message.

• Public grid frequency too high or too low
• Public grid outage.

Click steps to track your progress.

1. 1

   Check if the public grid is operational and stable in your area.

2. 2

   Check the AC disconnect between the Sunny Boy and the grid to ensure it is properly closed and not tripped.

3. 3

   If the grid frequency appears to be within the tolerable range and the message persists, contact SMA America technical support.