F30005 fault in siemens sinamics V90 drive indicates Power unit Overload I²t. This means the inverter has been pushed past its continuous thermal current rating for too long, requiring a reduction in load to prevent hardware damage.
Cause:
The power unit was overloaded.
- The permissible rated power unit current was exceeded for an inadmissibly long time.
- The permissible load duty cycle was not maintained.
Remedy:
- Reduce the continuous load.
- Adapt the load duty cycle.
- Check the motor and power unit rated currents.
