Lincoln 1133-000-A - Manual (Page 11)

Impinger II – Advantage Digital Service Manual - Domestic 11
wiring back to the oven power relay. If voltage is
present, check for 24 VAC at the transformer
secondary. If there is primary voltage but no
secondary voltage, replace control transformer.
Conveyor motor Check for 120 VAC supply to the conveyor motor
at wire #14 to neutral. If no voltage is present,
trace wiring back to the primary of the control
transformer. If voltage is present and the motor
will not run, check the motor windings for opens or
shorts.
WITH POWER OFF: Check the motor windings as
follows:
Grey to black - 38
Ω approx.
Grey to blue - 38
Ω approx.
Blue to black - 75
Ω approx.
If any of the above fails, replace conveyor motor.
Capacitor, conveyor motor Check for shorts or grounds. Replace capacitor as
needed.
WARNING: Capacitor has a stored charge,
discharge before testing.
Switch, conveyor reversing Check continuity between switch terminals.
Replace switch as needed.
Oven control If there is 120VAC supplied to the motor, and the
motor, capacitor, and reversing switch check
good, replace the oven control.
Conveyor motor runs, but
there is no speed display NOTE: Display will indicate
“Belt Jam”
Oven control Check for output voltage from oven control to hall
effect sensor (sensor is located in conveyor
motor). Measure voltage at the motor connector,
red wire and yellow wire. Voltage should be
approx. 10VDC. If no voltage is present, trace
wiring back to oven control. If there is no voltage
present at the oven control, replace the oven
control.
Conveyor motor If there is voltage supplied to the hall effect
sensor, check for a frequency output from the hall
effect sensor. Measure frequency across the
yellow and white wires at the motor connector.
Frequency reading should be approx. 25 – 100
Hz. If these readings are not achieved, replace
conveyor motor. If the readings are achieved,
proceed.
Oven control If the hall effect sensor readings are correct, but
there is no speed indicated on the display, replace
the oven control.