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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.

108

Stand-alone operation detected

Fronius · Symo Advanced Manual

What does 108 mean?

The inverter has detected an islanding condition, meaning it is operating independently from the main utility grid. This is a safety measure to prevent power feedback into a disconnected grid.

Common Causes

  • Loss of utility grid connection while the inverter continues to power local loads
  • Malfunction of anti-islanding protection

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