122 · vacon
Fault codes
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9
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
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Sudden change in grid frequency.
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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
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Sudden change in supply voltage or frequency.
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Unstable DC power source in uGrid mode.
-
Wrong Grid frequency.
Correcting measures
-
Check supply voltage.
-
Check DC source.
-
Check grid conditions.
