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ErrorLib — Industrial Fault Code Library

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412

Fixed voltage mode has been selected instead of MPP voltage mode, and the fixed voltage has been set to too low or too high a value

Fronius · Symo Advanced Manual

What does 412 mean?

The inverter is configured for fixed voltage operation, but the set DC input voltage is outside the acceptable range for the connected PV array or the inverter's capabilities. This prevents optimal power generation and grid feed-in.

Common Causes

  • Incorrect parameter setting for the fixed voltage mode
  • Mismatch between the PV array voltage characteristics and the programmed fixed voltage

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    If this status code keeps recurring, contact your system engineer to verify and adjust the fixed voltage settings.

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 42)Search more codes in this manual