Lincoln Impringer Conveyor Oven 1200 - Manual (Page 52)

Impinger I -–1000 Series Service Manual - International 52
Temp. display
inaccurate, erratic, or
inoperative Time/Temp. Display Perform the power supply check, the thermistor
probe check, and then perform the time/temp.
simulator test. Refer to page 72 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.
Perform all checks as in the above evaluation. If
the time check is okay, refer to the next section.
Conveyor Drive
(Stepper) Motor Check to see if the conveyor drive (stepper) motor
is running. If motor is not running refer to
"Conveyor will not run" on page 50.
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.
Time Display
inaccurate, erratic or
inoperative
Conveyor Drive
(Stepper) Control Check all connections for tightness or proper
location and check all wiring for visible damage.
Replace as needed. If there is still no time display,
wire in (temporarily) a new conveyor drive control.
If there is still no time display, reconnect original
conveyor drive control. Replace Hall Effect Sensor.