Yellow LED solid - Internal control system fault requiring service

What does Yellow LED solid (Control System Fault) mean?

The yellow LED is continuously lit, specifically indicating a 'Control System Fault' within the Sunny Boy's internal monitoring systems. When this occurs, the inverter will no longer connect to the utility grid.

• Internal fault within the inverter's monitoring systems.

Click steps to track your progress.

1. 1

   Record that the yellow LED is solid and note the 'Control System Fault' indication.

2. 2

   Contact SMA America for assistance, as the inverter requires servicing by a qualified technician.

3. 3

   Do not attempt to operate the inverter, as it will not connect to the grid and requires specialized repair.