Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 46)

experienced, such as a rolling of
numbers, or lock-up at a given number,
first check for a display circuit lock-up. This may be
caused by a voltage
spike or surge in the incoming power
lines. To eliminate this condition,
remove power from the time/temp
display by shutting off the main fan
switch for 15 seconds. This should
eliminate the problem. If this does not
solve the problem, it may becoming in
through the Commercial power lines.
Suggest that customer contact their
power company for evaluation.
Temp display inaccurate, Time/Temp Display Perform the power supply check, the
erratic, or inoperative thermistor probe check, and then
perform the time/temp simulator test.
Refer to Section D for instructions.
Remember, when using the time/temp
simulator, remove all leads from the
back of the time/temp display except the
3 power leads.
After completion of the test, and if re-
installing time/temp display back in the
oven, the dip switches must be reset for
oven operation, and the time/temp
display must be recalibrated. If
readings are not achieved, replace
display.
Time Display inaccurate, Perform all checks as in the above
erratic, or inoperative evaluation. If the time check is okay,
refer to the next section.
Conveyor Drive Check to see if the conveyor drive
(Stepper) Motor (stepper) motor is running. If motor
is not running, refer to “Conveyor will
not run” on Page 45.
Magnet Check to insure that the magnet
(cemented to shaft of conveyor drive
[stepper] motor) has not been damaged,
or come loose from motor shaft.
Replace as needed.
Hall Effect Sensor Check for any physical damage to Hall
Effect sensor (mounted on conveyor
drive [stepper] motor). Check all
wiring and connections for damage.
If the motor is running, the magnet is
in place, but the display shows”—:—”
the Hall Effect Sensor may be defective
or improperly connected.
Conveyor Drive Check all connections for tightness or
(Stepper Control) proper location and check all wiring
for visible damage. Replace as needed.
If there is still no time display and all
the above have checked out, replace the
stepper control
.
Impinger II - 1100 Series Service Manual - International 46