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as follows:
220V - 30 ohms approximately
240V - 36 ohms approximately
Oven heats with switch off Mercury Contactor The mercury contactor has probably
malfunctioned in the closed position. If
there is no voltage to the operating coil,
but there is high voltage at the contactor
output, replace the mercury contactor.
Intermittent Heating Thermal/Overload The main fan motor is equipped with
of motor internal thermal protection and will
cease to operate if overheating
occurs. As the motor overheats and
then cools, this will cause the oven to
cycle on and off intermittently. This
may be caused by improper ventilation
or preventative maintenance. Also,
most of the problems listed under
“Oven will not heat” can cause
intermittent failure.
Conveyor will not run REFER TO PAGE 31
Conveyor speed varying REFER TO PAGE 32
or intermittent
Time/Temp Display REFER TO PAGE 33
inoperative
Temp Display out or REFER TO PAGE 33
inaccurate
Impinger II - 1100 Series Service Manual - International36