Voltage Too High or Too Low on AC Grid Leg

What does VacL1-Bfr/VacL2-Bfr/VacL1-Srr/VacL2-Srr mean?

The voltage measured on a specific AC grid leg (L1 or L2) is either too high or too low for the Sunny Boy SB50US-80US-IUS094030, indicating an imbalance or out-of-tolerance condition on that particular phase. 'Bfr' and 'Srr' are internal processor messages.

• Voltage on AC grid leg L1 or L2 exceeding specified upper limits.
• Voltage on AC grid leg L1 or L2 falling below specified lower limits.

Click steps to track your progress.

1. 1

   Check the condition of the grid at the AC terminal blocks within the Sunny Boy SB50US-80US-IUS094030, focusing on voltages for L1 and L2.

2. 2

   Inspect the AC disconnect between the Sunny Boy and the grid.