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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.

302

Overcurrent (DC)

Fronius · Symo Advanced Manual

What does 302 mean?

The inverter has detected an excessive current flow on the DC input side from the solar modules. This results in a short-term interruption of energy feeding, and the inverter will then attempt to resume its start-up routine.

Common Causes

  • Short circuit or ground fault in the DC solar module array
  • Internal inverter fault in the DC input stage

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