Description
The system detected an unexpectedly low DC bus voltage in a drive unit that was not used by any joint. The drive unit is located in drive module arg at unit position arg .
Consequences
No action can be taken until the fault is corrected. The system will go to "Motor Off" state.
Possible causes
- Incoming power supply is missing.
- DC The connection between the bus cable and drive unit is poor.
- DC A short circuit has occurred on the bus. The short may be located within the drive unit or within the cable.
Recommended actions
- Check the incoming power supply.
- Check DC line.
- Check if any short circuit occurs.
- Replace drive unit.