106

AC frequency too low

Fronius · Solar Energy

What does 106 mean?

The AC grid frequency is detected as too low. The inverter temporarily disconnects from the grid according to safety standards and will resume operation once the frequency returns to the permissible range.

Common Causes

  • Insufficient AC frequency from the public grid
  • Poor grid connection quality

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check all AC grid connections at the inverter and point of common coupling

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Verified technical data. Last updated: March 2026

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