RCMU error

What does 112 mean?

This code indicates an error within the Residual Current Monitoring Unit (RCMU). This component is crucial for detecting fault currents to ground, ensuring safety and compliance. This error prevents the inverter from operating safely.

• Malfunction of the internal RCMU circuitry.
• External factors influencing RCMU measurement, such as ground faults in the PV system.

Click steps to track your progress.

1. 1

   Perform an AC reset by switching the automatic circuit breaker off and on again to clear transient errors.

2. 2

   If the status code is displayed continuously, notify a Fronius-trained service engineer for RCMU diagnosis and repair.