Yellow LED blinks 7 times — Drastic change in differential current

What does Yellow LED blinks 7 times mean?

The inverter has detected a sudden change in differential current (IDN > 30 mA) and has disconnected from the grid for safety. This specific fault can only occur in transformerless inverters.

• Drastic change in differential current relative to ground.

Click steps to track your progress.

1. 1

   Identify if your inverter is a transformerless model (has 'TL' in its name, e.g., Sunny Boy 10000TL-US).

2. 2

   Contact your installer or SMA for assistance, as this relates to an advanced internal protection system.

3. 3

   Do not attempt to troubleshoot this issue yourself due to the potential for high voltages and specialized equipment needed.