Incorrect grid type / no grid connected

What does 109 mean?

The Fronius Primo GEN24 208-240 inverter has detected that the connected grid type is not supported or that no AC grid is connected. This prevents the inverter from synchronizing and feeding power.

• Incorrect grid type.
• No grid connected.

Click steps to track your progress.

1. 1

   Verify that the AC grid is correctly connected to the Fronius Primo GEN24 208-240 inverter's AC terminals and all connections are secure.

2. 2

   Confirm that the grid type (e.g., single-phase, split-phase) configured in the inverter settings matches the actual grid connection.

3. 3

   Check if the AC output breaker or disconnect switch for the inverter is closed and not tripped.

4. 4

   Ensure the correct country/grid standard is selected in the inverter's configuration settings.

5. 5

   Measure the AC voltage at the inverter's AC input terminals to confirm the grid is present and within specified voltage limits.