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ErrorLib — Industrial Fault Code Library

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106

AC frequency too low

Fronius · Primo GEN24 Operating Instructions

What does 106 mean?

This code indicates that the AC grid frequency is too low, leading the inverter to disconnect from the grid to comply with standards. The inverter will monitor the grid and resume operation automatically once the frequency returns to the permissible range.

Common Causes

  • Public grid frequency drops below the specified lower limit.
  • Temporary grid instability causing frequency deviation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Monitor the AC grid frequency to confirm it stabilizes within the allowable operating range.

  2. 2

    Verify the country-specific grid settings in the inverter's configuration for frequency limits.

  3. 3

    If this status code keeps recurring, contact your system fitter or grid operator.

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