Bfr-Srr - Communication failure between micro-controllers

What does Bfr-Srr mean?

The internal communication between the Sunny Boy's micro-controllers has failed. This is identified as a disturbance message.

• Internal communication issue within the inverter.

Click steps to track your progress.

1. 1

   Turn off the external DC disconnect for the Sunny Boy.

2. 2

   Turn off the main AC circuit breaker for the Sunny Boy.

3. 3

   Wait a few minutes, then turn on the AC breaker, followed by the DC disconnect.

4. 4

   If the error persists, record the error code and contact SMA America technical support.