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.
Complete Troubleshooting Guide
- 1
Measure incoming mains voltage: Use a multimeter to check the voltage at the drive's input terminals and compare it to the drive's rated input voltage.
- 2
Check for voltage spikes/surges: Monitor the mains supply for transient overvoltages using a power quality analyzer if the issue is intermittent.
- 3
Verify grid stability: Consult with facility electricians regarding the stability of the local power grid.
- 4
Inspect input filtering components: Check for damaged or degraded input chokes, capacitors, or surge protectors.
- 5
Ensure proper grounding: Verify that the drive and its power supply are correctly grounded according to installation guidelines.