Leads Attached To The Temperature, Temperature Control

		LEADS ATTACHED TO THE TEMPERATURE
		CONTROL BOARD: measure D. C. millivolt output of
		these leads. Refer to thermocouple chart in SectionD
		for proper readings. If these readings
		are not achieved, replace thermocouple.
	Temperature Control	WITH POWER OFF: remove the
	Potentiometer	potentiometer leads from the temperature control
		board and measure ohms from black to white leads.
		The reading should be from approximately
		0 to 2.5k ohms as the dial of the
		potentiometer is turned throughout its full rotation.
		From black to red leads, the reading should be
		approximately 2.5k ohms (constant) throughout the
		full rotation of the dial. If these readings are not
		achieved, replace potentiometer. If the thermocouple
		probe and the control potentiometer check good,
		then the problem is usually with the temperature
		control board.
	Mercury Contactor	Check for 120 VAC to the contactor coil. If voltage is
		present and contactor will not activate, replace the
		contactor. Also, check each contactor for proper
		high voltage input and output.
	Heater Elements	Check the Amp. draw on each hot leg for
		proper load.Check the specifications plate for rating
		information.If the Amp. draw is low or high, check
		the individual elements for opens, shorts, and proper
		resistance.
		WITH POWER OFF: To check resistance of the
		elements, remove all leads from the elements and
		use an accurate digital VOM. The element resistance
		should be 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 is equipped with internal
		of motort hermal protection and will cease to
		operate if overheating occurs. If the
		motor overheats and then cools, this will
		cause the unit 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.

Impinger II - 1100 Series Service Manual - International

Lincoln 1100 Series Leads Attached To The Temperature, for proper readings. If these readings

Models: 1100 Series

for proper readings. If these readings

are not achieved, replace thermocouple.

potentiometer leads from the temperature control

board and measure ohms from black to white leads.

The reading should be from approximately

0 to 2.5k ohms as the dial of the

contactor. Also, check each contactor for proper

resistance.

WITH POWER OFF: To check resistance of the

elements, remove all leads from the elements and

should be as follows:

220V -

30 ohms

approximately

240V -

36 ohms

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.

The main fan is equipped with internal

of motort hermal protection and will cease to

operate if overheating occurs. If the

motor overheats and then cools, this will

cause the unit 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.