Maintenance and Troubleshooting
29
Problem Observed
Possible Cause
Solution
One or more internal temperature
sensors not reading.
Signal or power wiring is bad.
One or more wires or
terminals are misplaced, or
are open or shorted to wires
or the frame at one of the
temperature sensors or the
CAN I/O board.
Repair wiring as needed.
One or both of the
temperature sensors is bad.
Remove connectors at the
temperature sensor to test one
sensor at a time. Replace any
bad sensors.
CAN I/O board is bad.
Replace CAN I/O board.
Temperature sensor is not
configured correctly.
Correct the settings. Refer to
the controller manual.
One fuse indicates failure from
the operator software or the
VFC-3000 controller. All others
indicate OK.
Fuse blown on reported
LVDB.
Replace blown fuse.
One power supply indicates “bad”
from the operator software or the
VFC-3000 controller. All others
indicate OK.
One LVDB is bad.
Replace LVDB.
Bad power supply.
Replace power supply.
Wiring for power supply in
CAN I/O is bad.
Repair as needed.