ST130 | Error E.oU1 – What does it mean and what can be done?
If the error message E.oU1 appears on the ST130 inverter display, it indicates an overvoltage fault during motor acceleration.
| Possible cause | Possible solution |
| Acceleration ramp too short | Increase the acceleration time (F0.05) |
| External torque is accelerating the motor | Remove external torque |
| Supply voltage too high | Check mains connection |
| Motor still moving after power failure at start | Enable speed matching or stop the motor before startup |