Lincoln 1131-000-A activate, replace the mercury contactor. Also, output, Heating elements

		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
		240V – 36 ohms
		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
		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. Improper ventilation or lack
		of preventive maintenance may cause this. Also,
		most of the problems listed under “Oven will not
		heat” can cause intermittent failure.
Conveyor will not run	Power supply	Check circuit breakers, reset if required. Check
		power plug to be sure it is firmly in receptacle.
		Measure incoming power, call power co. if
		needed.
	Fuse, 10 Amp	Check, replace if necessary.
	Fuse holder	Check, replace if necessary.
	Hi-limit thermostat, control box	Check for voltage on both sides of switch.
		Terminals are normally closed. If open, reset and
		test oven for proper operation. If thermostat will
		not hold, and control box temperature is not
		exceeding 140°F (60°C), replace thermostat.
	Power switch	Check continuity between switch terminals.
		Replace switch as needed.
	Control transformer	Check for supply voltage to the primary of the
		control transformer. If no voltage is present, trace
		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 supply voltage to the conveyor motor.
		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:	240Ω approx.
		Grey to black -
		Grey to tan -	240Ω approx.
		Tan to black -	480Ω 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,

14 Impinger II – Advantage Digital Service Manual - Domestic