ST130 | Error E.oU3 – What does it mean and what can be done?
If the error message E.oU3 appears on the ST130 inverter display, it indicates an overvoltage fault during constant speed operation of the connected motor.
| Possible cause | Possible solution |
| External torque accelerates motor | Remove the torque |
| High inertia of the load | Install braking resistor (only with ST130Z version with braking unit), or brake externally if necessary |
| Abnormal supply voltage | Check power connection, install line filter |