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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.

476

Driver supply voltage too low

Fronius · Symo Advanced Manual

What does 476 mean?

The internal supply voltage for the inverter's gate drivers, which control the power semiconductors, is too low. This can prevent the power stage from operating correctly or safely.

Common Causes

  • Internal power supply malfunction within the inverter
  • Component failure in the driver supply circuit

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If this status code keeps recurring, contact your system engineer for diagnosis.

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 44)Search more codes in this manual