Danfoss Vacon NXP Applications Manual page 125

Fault codes
F3 Earth fault
Earth fault protection makes sure that the sum of the motor phase currents is 0. The over
current protection is always working and protects the AC drive from earth faults with high
currents.
S1 = Sum of output phase current is not zero.
Possible cause
- No transformer on the input/output side.
- Insulation failure.
Correcting measures
- Contact factory.
F5 Charge switch
Charge switch status is not correct when the start command is given.
S1 = Charge switch was open when the start command was given.
Possible cause
- Charge switch was open when the start command was given.
- Reset the fault and restart.
Correcting measures
- Check the connection of the feedback from charging relay
- If the fault re-occurs, contact your local distributor.
F6 Emergency stop
Emergency stop command has been given by using a special option board.
F7 Saturation fault
S1 = Hardware failure.
Possible cause and solutions
Correcting measures
- Check the isolation resistance and the resistance on the brake resistor.
- Check the capacitors.
24-hour support: +358 (0)201 212 575 • Email: vacon@vacon.com
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