Vacon NX ACTIVE FRONT END II Applications Manual page 88

88 • Vacon
F41 IGBT temperature
IGBT inverter bridge over temperature protection has detected too high a short term overload
current.
Correcting measures:
1. Check load.
F44 Device changed (Default param.)
Possible cause:
1. Option board or power unit changed.
2. New device of different type or different rating from the previous one.
Correcting measures:
1. Reset
2. Set the option board parameters again if option board was changed. Set converter
parameters again if power unit was changed.
F45 Device added (default param.)
Possible cause:
1. Option board of different type added.
Correcting measures:
1. Reset
2. Set the option board parameters again.
F50 4mA supervision
Possible cause:
1. Current at the analogue input is below 4mA.
2. Signal source has failed
3. Control cable is broken or loose
Correcting measures:
1. Check the current loop circuitry.
F51 External fault
Possible cause:
1. Digital input fault.
Correcting measures:
1. Remove fault situation from external device.
F52 Keypad communication
Possible cause:
1. The connection between the control keypad or NCDrive and the AC drive is broken.
Correcting measures:
1. Check keypad connection and possible keypad cable.
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
arfiff05 Standard AFE-II