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: March 2026

Related Faults

Source: Fronius Symo Advanced Manual