Lincoln II - Advantage Series service manual With Power on and Thermocouple Leads

	Power Supply	If there is sufficient micro-amp current, but the flame
		will not stay lit, check for proper polarity of the 120
		VAC power supply.
	Ignition Control	If there is sufficient micro-amp current, and the 120
		VAC polarity is correct, but the flame will not stay lit,
		replace ignition control.
		NOTE: Check for proper ground connection on
	NOTE: Flame should be lit at	ignition control.
	this time.
Low flame is on,	Temperature Control	Check for 120 VAC at terminal #7
but no main flame		to neutral on temperature control. If no voltage,
		trace voltage back through centrifugal switch and hi-
		limit. Turn the temperature adjustment knob to
		maximum temperature position and check for 120
		VAC at the load terminal #8 and neutral. If 120 VAC
		is present and unit is not heating, refer to
		"Temperature Solenoid Valve" for next check. If 120
		VAC is not present, proceed.
	Thermocouple Probe	WITH POWER ON AND THERMOCOUPLE LEADS
		ATTACHED TO THE TEMPERATURE CONTROL
		BOARD: Measure the D.C. millivolt output of these
		leads. Refer to thermocouple chart in Section D for
		proper readings. If these readings are not achieved,
		replace the thermocouple.
	Temperature Set	Disconnect the potentiometer leads
	Potentiometer	from the board. Place ohm meter test leads on the
		blue and green pot leads. Reading should be 1 K
		ohms. Place meter leads across the blue and purple
		pot leads and rotate knob from high to low. Repeat
		on green and purple leads. Check for even rise and
		fall of ohms reading to insure that there are no open
		or dead spots in the potentiometer. Check each
		lead to ground for shorts. Replace pot if it does not
		meet the above test.
	Temperature Solenoid	If 120 VAC is present on the
	Valve	temperature control board at load terminal #8 to
		neutral, check for voltage at temperature regulation
		valve. If voltage is present, listen for valve to open
		and close. Also check for opens or shorts in the coil.
		Replace as necessary.
Intermittent Heating	Thermal/Overload of Main Fan	The main fan motor and the burner blower motor are
	and Burner Blower Motors	equipped with internal thermal protection and will
		cease to operate if over heating occurs. As the
		motors overheat and then cool, this will cause the
		units to cycle on and off intermittently. This may be
		caused by improper ventilation or preventive
		maintenance. Also, most of the problems listed
		under "Oven will not heat" can cause intermittent
		failure.
Conveyor will not run	Voltage Supply	Check incoming voltage supply at line 1 to neutral.
		There should be a voltage reading of 120 VAC. If
		not present, check breakers.
	10 Amp Fuse	Check and/or replace.
	Fuseholder	Check and/or replace.
	Fan Switch	See procedure for checking on Page 10.

10 Impinger II – Advantage Service Manual - Domestic