AC frequency too high

What does 104 mean?

The frequency of the AC grid at the inverter's connection point has exceeded the maximum allowable limit for the Fronius Primo GEN24 208-240 inverter. The inverter will disconnect from the grid to ensure stability and protection.

• The grid frequency is too high.
• The grid is unstable.

Click steps to track your progress.

1. 1

   Measure the AC grid frequency at the inverter's connection point and verify it is within the allowed operating range.

2. 2

   Observe if the grid frequency instability is a continuous or intermittent problem.

3. 3

   Check for any local equipment that might be influencing the grid frequency if the issue is localized.

4. 4

   Contact the grid operator immediately to report the unstable or high grid frequency condition, as this indicates a potential issue with the public grid.