F30001 fault in siemens sinamics V90 drive indicates Power unit Overcurrent. This means the inverter detected a severe current spike in its output stages, usually due to a short-circuit in the motor cables or a ground fault.
Cause:
The power unit has detected an overcurrent condition.
- Closed-loop control is incorrectly parameterized.
- Controller parameters are not proper.
- Motor has a short-circuit or fault to ground (frame).
- Power cables are not correctly connected.
- Power cables exceed the maximum permissible length.
- Power unit defective.
- Line phase interrupted.
Remedy:
- Check the motor data – if required, carry out commissioning.
- Modify speed loop Kp (p29120), position loop Kv (p29110).
- Check the motor circuit configuration (star-delta).
- Check the power cable connections.
- Check the power cables for short-circuit or ground fault.
- Check the length of the power cables.
- Replace power unit.
- Check the line supply phases.
- Check the external braking resistor connection.
