SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
The circuit breaker is tripped.
Check for a short in the motor or the
cable.
No power from I/O PCB to the motor.
Verify voltage at I/O PCB and the
motor.
Blown fuses (I/O-version R and
earlier).
Check the fuses on the I/O PCB.
The conveyor does not start.
The conveyor motor capacitor is
defective.
Inspect motor capacitor for damage.
There is a build up of chips.
Clear excessive chips and any
obstructions.
The conveyor belt is damaged.
Inspect conveyor belt and repair or
replace.
Conveyor is noisy or oscillates between forward and
reverse.
The conveyor belt tension is incorrect.
Adjust the belt tension.
Motor Cable Inspection
Corrective Action:
Inspect the motor cable for any sign of damage.
Check for burn marks at the plug. This could be
caused by coolant contamination.
Measure the Ohms the across the motor power
cable leads [1] at the plug. There should be
resistance leg to leg. An open reading suggests a
bad motor or cable.
Measure the Ohms on the motor power cable from
each power leg to the ground leg [2] of the plug.
This reading should be open.
If cable shows a short leg to ground at the plug,
disconnect the power cable at the motor and check
each motor power lead to the motor chassis [3]. If
reading is open, the cable is at fault. If any lead
tests short, the motor is motor is shorted.
Conveyor System - Troubleshooting Guide
Page 2 of 5 pages
