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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.

308

Intermediate circuit voltage too high

Fronius · Symo Advanced Manual

What does 308 mean?

The DC link voltage (intermediate circuit) within the inverter has risen above its maximum permissible operating limit. This causes a short-term interruption in energy feeding, and the inverter will then attempt to resume its start-up routine.

Common Causes

  • Overvoltage condition on the DC input from the solar modules
  • Internal inverter control or regulation malfunction

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 42)Search more codes in this manual