Lincoln 1100 Series service manual then the problem is usually with thetemperature

		then the problem is usually with thetemperature
		control board.
	Temperature Control	If 120 VAC is present on the
	Valve	temperature control board at load
		terminal to neutral, check for voltageat Tempera
		ture Control valve. If voltage is present, listen for
		valve to open and close. Also check for
		opens or shorts in the coil.
		Replace if required.
Intermittent heating	Thermal Overload Of	Both the main fan motor and the
	Main Fan and Burner	burner blower motor are equipped
	Blower Motors	with internal thermal protection and
		will cease to operate if overheatingoccurs. As the
		motors overheat and then cool, this will cause the
		unitsto cycle on and off intermittently.
		This may be caused by improper ventilation or
		preventativemaintenance. Also, most of the
		problems listed under “Oven Will Not
		Heat” can cause intermittent failure.
Conveyor will not run	3 Amp Fuse	Check and replace if defective.
	Fuseholder	Check and replace if defective.
	Fan Switch	Check for continuity between switch
		terminals.
S/N 2011821 & Above	Conveyor Switch	Check for continuity between switch
Refer to Page 45		terminals.
	Speed Adjustment	This is a 0 to 5 K ohm, 10 turn
	Potentiometer.	WITH POWER OFF: Remove the red, black
		and white pot. leads from the motor control
		board at terminalsP1, P2 and P3. With a
		digital multimeter, check the ohm reading
		across the red lead to the black lead. This
		reading shouldbe 5 K ohms ± 5% as the pot is
		rotated from low to high.Place the meter leads on
		the redlead and on the white lead.Rotating the
		pot. slowly, from low to high, the meter reading
		should show an even transition from 0 to
		5 K ohms ± 5%. There should be
		no dead or open spots through out
		the 10 turns of the pot.
		Check all three leads to ground.
		There should be no continuity to
		ground. If any of the above checks
		fail, replace the pot.
	DC Motor Control Board	Check for 120 VAC input to the
		control board at terminals L1 and
		L2. If not present, check the
		conveyor switch and wiring back to the
		3 amp fuse and then back to the power
		source if necessary. If 120 VAC is
		present at L1 and L2, check the VDC
		output at terminals A+ and A-. If a
		DC voltage is not present, check the
		4 amp and the 1 amp fuses on the

30 Impinger II - 1100 Series Service Manual - International