OUE

Mains overvoltage

Lenze · SHB4800/4900

What does OUE mean?

This fault occurs when the incoming mains voltage exceeds the permissible operating range for the drive. By default, this critical condition triggers a full TRIP, inhibiting all ignition pulses and resetting the Ready signal to protect the drive's power electronics from damage due to overvoltage. It requires manual reset after the voltage issue is resolved.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Verify grid stability: Consult with facility electricians regarding the stability of the local power grid.

  2. 4

    Inspect input filtering components: Check for damaged or degraded input chokes, capacitors, or surge protectors.

  3. 5

    Ensure proper grounding: Verify that the drive and its power supply are correctly grounded according to installation guidelines.

Source: Lenze SHB4800/4900
View Official PDF