107
No AC grid
Fronius · Primo GEN24 Operating Instructions
What does 107 mean?
This code indicates a complete absence of an AC grid connection, preventing the inverter from feeding energy. The inverter will automatically attempt to connect again once an AC grid is detected.
Common Causes
- Loss of AC power from the public grid.
- Open circuit breaker or faulty connection on the AC side of the inverter.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Check the AC voltage on the inverter connection sockets; it must be 220/230 V (+10% / -5%) or 380/400 V (+10% / -5%).
- 2
Verify that all AC circuit breakers leading to the inverter are closed and functional.
- 3
Inspect all AC cable connections for integrity and secure termination.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fronius Primo GEN24 Operating Instructions