Danfoss Vacon NXP Applications Manual page 132

130 · vacon
F50 4mA supervision
Possible cause:
- Current at the analogue input is below 4mA.
- Signal source has failed.
- Control cable is broken or loose.
Correcting measures:
- Check the current loop circuitry.
F51 External fault
Possible cause:
- Digital input fault.
Correcting measures:
- Remove fault situation from the external device.
F52 Keypad communication
Possible cause:
- The connection between the control panel (Keypad) or NCDrive and the AC drive is broken.
Correcting measures:
- Check control panel connection and possible control panel cable.
F53 Fieldbus communication fault on slot D
Possible cause:
- The data connection between the fieldbus Master and the fieldbus board is broken.
- Watchdog pulse is missing from PLC, if Control Slot selector is 0, or set for slot D.
Correcting measures:
- Check installation.
- If installation is correct, contact your local distributor.
F54 Slot fault
Possible cause:
- Defective option board or slot.
Correcting measures:
- Check the board and the slot.
- Contact your local distributor.
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Fault codes