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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. 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. 2

    Verify that all AC circuit breakers leading to the inverter are closed and functional.

  3. 3

    Inspect all AC cable connections for integrity and secure termination.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

102AC voltage too high103AC voltage too low105AC frequency too high
Source: Fronius Primo GEN24 Operating Instructions
Open Manual (Page 103)Search more codes in this manual