AC frequency too low

What does 105 mean?

The frequency of the AC grid at the inverter's connection point has dropped below the minimum allowable limit for the Fronius Primo GEN24 208-240 inverter. This condition will cause the inverter to disconnect to prevent damage or improper operation.

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

Click steps to track your progress.

1. 1

   Verify the AC grid frequency at the inverter's connection point using a frequency meter or a multimeter with frequency measurement capability.

2. 2

   Determine if the low grid frequency is a persistent issue or a transient event.

3. 3

   Ensure no local large inductive loads are causing significant frequency deviations.

4. 4

   Immediately contact the grid operator to report the unstable or low grid frequency, as this points to a potential public grid instability or generation issue.