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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 · 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

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

Related Faults

1Hardware fault102AC voltage too high103AC voltage too low
Source: Fronius Solar Energy
Open Manual (Page 123)Search more codes in this manual