Fronius Symo Hybrid Inverter Code 112 — RCMU error

What does 112 mean?

The Residual Current Monitoring Unit (RCMU) in the inverter has detected an error. This causes the inverter to temporarily disconnect from the grid.

• Internal RCMU malfunction
• Ground fault detected
• Incorrect wiring causing RCMU to trip

Click steps to track your progress.

1. 1

   Observe if the inverter resumes feeding energy after a short period.

2. 2

   Check the grid connections and wiring for any potential ground faults.

3. 3

   If this status code keeps recurring, contact your system fitter for diagnosis of the RCMU.