106

AC frequency too low

Fronius · Symo Advanced Manual

What does 106 mean?

The grid frequency has dropped below the permissible range. The inverter will disconnect from the grid and will resume operation once the frequency stabilizes within the acceptable range after a monitoring period.

Common Causes

  • Public grid frequency instability, dropping below lower limits

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If this status code keeps recurring, contact your system engineer for further grid analysis.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Fronius Symo Advanced Manual