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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

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.

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 Symo Advanced Manual
Open Manual (Page 41)Search more codes in this manual