Grid fault

What does 401 mean?

The inverter has disconnected from the utility grid because it detected a stand-alone grid condition or a very large change in the power frequency. This protects the inverter and grid from unstable power conditions.

• Detection of a stand-alone grid (island operation).
• Significant short-term fluctuations in the power frequency of the utility grid.

Click steps to track your progress.

1. 1

   Check the grid connection for significant short-term frequency fluctuations.