User`s manual

apfiff09 marine vacon • 245
24-
7
12. FAULT CODES
F1 Overcurrent fault
Drive has detected a high current in the output phase.
S1 = Hardware trip: Current above 4*Ih
S2 = Only in NXS unit
S3 = Current controller supervision. Current limit too low or current peak value too high.
Possible cause and solutions
1. Sudden increase in load
 Check motor load.
2. Short circuit in motor cables
 Check motor and cables.
3. Motor is undermagnetized at start.
 Make identification run
4. Unsuitable motor
5. Sine filter is used but drive settings are not correct
 Activate Sine filter parameter (P6.7.5) in system menu
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
1. Too short a deceleration time
 Increase deceleration time.
 Use brake chopper and brake resistor.
 Use Brake chopper unit.
 Use active front end unit (AFE ARFIFF02).
 Activate overvoltage controller.
2. High overvoltage spikes in supply
 Activate overvoltage controller.
3. 690 V unit operating too long above 1100 Vdc
 Check input voltage.
F3 Earth fault
Earth fault protection ensures that the sum of the motor phase currents is zero. The
overcurrent protection is always working and protects the frequency converter from earth
faults with high currents.
S1 = Sum of motor current is not zero
Possible cause and solutions
1. Insulation failure in cables or motor
 Check motor cables and motor.