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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.

112

RCMU error

Fronius · Symo Advanced Manual

What does 112 mean?

An error has been detected in the Residual Current Monitoring Unit (RCMU). This unit is responsible for monitoring leakage currents to ground for safety.

Common Causes

  • Internal fault or malfunction of the RCMU circuitry

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

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

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