Repair manual

MT1828
5 --- 1
DC DRIVE SYSTEM
POSSIBLE CAUSE(S) SUGGESTED REMEDY
Symptom #1 --- Conveyor Belt will not run
D Oven in OFF mode.
D Loose computer controller cord connection.
D Time not programmed into computer.
D Emergency stop switch on OFF.
D Control circuit break er tripped.
D Belt hooked on something in oven.
D 5 amp line fuse blown.
D 200 milliamp armiture fuse blown.
D Hall Effect Pickup not connected. (Closed loop
systems only)
D Motor brushes w orn out.
D Defectiveconveyordrivemotor.
D Defectiveconveyordrivemotorcontroller.
D Wire from pickup open or faulty connection.
D Turn to ON position.
D Adjust and retighten cables and set screws.
D Program in a cook time. See Operation Section
( p a g e 2 --- 2 ) .
D Pull switch out to ON.
D Reset breaker.
D Turn oven OFF, unhook and repair problem.
D Replacefuse.Determineampdraw.
D Replacefuse.Determineampdraw.
D Verify the unit is set for a single pulse pickup. If
not, reset for a single pulse pickup. If yes reattach
the pickup.
D Replace brushes.
D Replaceconveyordrivemotor.
D Replaceconveyordrivemotorcontroller.
D Repair or replace wire.
Symptom #2 --- Computer error code MOTOR - SPEED - ERROR
D Belt speed needs calibration. D See Technical Appendix (page 3---6).
D V oltage from Bodine controller to DAC not pres-
ent. The DAC (Digital Analog Control) is a non-re-
pairable component of the computer. There
should be approximately 20 VDC betw een the
red and green wires on the 3 pin connection of
the DC drive board.
D Replace t he drive motor controller.
D DAC voltage is present but not regulated be-
tween 4.7 and .47 VDC when different times are
programmed into the cooking computer. Mea-
sure the voltage between the green and blue
wires of the 3 pin connection.
D Replace 9 pin computer cable
D Replace t he computer.