Lincoln 1132-080-A, 1162-080-A, 1131-08H-A If there is a read-out on the control, set the control

		If there is a read-out on the control, set the control
		to maximum temperature (see installation
		operations manual for temperature adjustment).
		With the control set at maximum temperature,
		check for supply voltage at mercury contactor. If
		there is voltage at the mercury contactor, proceed
		to “mercury contactor” for next check. If there is no
		voltage at the mercury contactor, trace wiring back
		to the oven control. If there is no voltage output at
		the oven control, check the read-out on the
		control. If the control reads “PROBE FAIL”, this
		indicates that the thermocouple has failed or
		become disconnected from the oven control.
	Thermocouple	Check to be sure that the thermocouple is
		securely connected to the oven control. If the
		thermocouple is connected to the oven control,
		and the control indicates “PROBE FAIL”,
		disconnect the thermocouple from the oven
		control and measure the resistance of the
		thermocouple. The thermocouple should read
		approx. 11Ω. If these readings are not achieved,
		replace the thermocouple. If these readings are
		correct, proceed.
	Oven control	If the thermocouple checks good, but the oven
		control display indicates that there is a
		thermocouple failure, replace the oven control. If
		the oven control indicates a temperature reading
		but the oven will not heat, proceed.
	Thermocouple	WITH POWER ON AND THERMOCOUPLE
		ATTACHED TO THE OVEN CONTROL: Measure
		the DC millivolt output of the thermocouple. Refer
		to the thermocouple chart (located in the
		“Removal” section of the manual) for proper
		millivolt readings. If these readings are not
		achieved, replace thermocouple.
	Oven control	If the thermocouple checks good, but there is no
		voltage output to the mercury contactor, replace
		the oven control. If there is voltage output to the
		mercury contactor, proceed.
	Mercury contactor	Check for supply voltage to the contactor coil. If
		voltage is present and the contactor will not
		activate, replace the mercury contactor. Also
		check each contactor for high voltage input and
		output.
	Heating element(s)	Check the Amp draw on each power leg for proper
		load. Check the specification plate for rating
		information. If the amp draw is high or low, 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 a digital multimeter.
		The element resistance is should be as follows:
		208V – 27 ohms approx.
		240V – 36 ohms approx.
		Replace heating elements as needed.
Oven heats with switch off	Mercury contactor	The mercury contactor has probably failed 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 of motor	The main fan motor is equipped with internal

18 Impinger II – Advantage Digital Express Service Manual - Domestic