Impinger 3270 Service Manual – Dom & Int’l
17
voltage at switch, replace conveyor control. If voltage is
present, check motor windings for opens or shorts.
WITH POWER OFF: Check the motor windings as follows:
Grey to Black – 116 ohm approx.
Grey to Brown – 116 ohm approx.
Brown to Black – 230 ohm approx.
If any of the above fail, replace motor.
Conveyor will not run
(continued)
Conveyor Motor
Capacitor
Check for shorts or grounds. Replace capacitor as
needed.
WARNING: Capacitor has a stored charge. Discharge
before testing!
Conveyor
Check for any mechanical problems in the conveyor
assembly. Check for damaged or torn belting. Check
conveyor shaft bearings for damage or excessive wear.
Repair or replace conveyor components as needed.
Oven Control
Check 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 the oven control. If there is no voltage
output present at the oven control, replace the oven
control.
Conveyor runs but no
speed control
Motor, Conveyor
If there is voltage supplied to the hall effect sensor, check
for frequency output from the hall effect sensor. Measure
frequency across the yellow and white wires at the motor
connector. Frequency readings should be between 25 –
500 Hz. If these readings are not achieved, replace the
conveyor motor. If these 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.
