F30004 fault in Siemens V70 Drive indicates Drive heat sink overtemperature. This means the power module’s heat sink is dangerously hot, usually due to a failed cooling fan, poor ventilation, or continuous overload.
Cause: The temperature of the power unit heat sink has exceeded the permissible limit value.
- Insufficient cooling, fan failure.
- Overload.
- Ambient temperature too high.
- Pulse frequency too high.
Remedy:
- Check whether the fan is running.
- Check the fan elements.
- Check whether the ambient temperature is in the permissible range.
- Check the motor load.
- Reduce the pulse frequency if this is higher than the rated pulse frequency.
