E.LSF fault in KEB COMBIVERT R6 Drive indicates a DC Bus charge fault. This means the drive failed to properly pre-charge its DC bus capacitors, likely due to a defective load-shunt, low input voltage, or high cable losses.
Cause:
If the error does not reset itself after power up and the fault remains, the following causes may be applicable:
- Load-shunt defective.
- Input voltage wrong or too low.
- High losses in the supply cable.
Remedy:
The unit must be serviced. Verify the line supply or transformer output supply and ensure there is no excessive sags or brown-out conditions.
