F30081 fault in siemens 6RA80 DC Drive indicate that the switching operations too frequent. This means the power unit has executed too many switching operations for current limitation.

1. Check the motor data - if required, carry out commissioning.
2. U/f operation: Increase up ramp.
3. U/f operation: Check assignment of rated currents of motor and power unit.
4. Check the power cable connections.
5. Check the power cables for short-circuit or ground fault.