Fault Codes - Danfoss Vacon NXP Applications Manual

122 · vacon

9. Fault codes

This chapter includes all the fault codes. However, some faults are not possible in the AFE mode.
With other faults, the description can be different when compared to a standard AC drive.
F1 Over current fault
The drive has detected a high current in the output phase.
S1 = Hardware trip.
Current above 4*Ih
S3 = Current controller supervision.
Current limit too low or current peak value too high.
Possible cause
- Sudden change in grid frequency.
- Sudden change in grid voltage.
- Short circuit in grid while Short Circuit function is not active.
Correcting measures
- Check grid conditions load.
- Activate Short Circuit function.
F2 Overvoltage fault
DC link voltage has exceeded the drive protection limits.
S1 = Hardware trip.
500 Vac unit DC voltage above 911 Vdc
690 Vac unit DC voltage above 1200 Vdc
S2 = Overvoltage control supervision (only 690 Vac unit).
DC voltage has been above 1100 Vdc for too long.
Possible cause and solutions
- Sudden change in supply voltage or frequency.
- Unstable DC power source in uGrid mode.
- Wrong Grid frequency.
Correcting measures
- Check supply voltage.
- Check DC source.
- Check grid conditions.
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Fault codes