Lincoln 1400, 1200, 1000 For ovens with, Johnson Controls, Ignition Control, Honeywell Ignition

	Air Pressure Switch	Check for 120 VAC on both sides of switch. If
		voltage present on one side only, check for air tube
		blockage. Adjust air switch. If above fails, replace
		air pressure switch.
	Transformer, 24 VAC	Check for 120 VAC to primary of transformer.
		Check for 24 VAC from secondary of transformer. If
		there is primary voltage, but no secondary voltage,
		replace transformer.
NOTE:	(Model 1004 & 1005)	For oven models 1004 and 1005, there is a 1 Amp
		fuse located between the 24 VAC output from the
		transformer and the coil of the burner motor relay. If
		there is 24 VAC output from the transformer, but no
		burner motor relay action, check fuse and fuse
		holder. Replace as necessary.
	Burner Motor Relay	Delete burner motor relay refer to Section D, Page
		34.
	Burner Blower Motor	Check for 120 VAC supply to burner blower motor.
		If 120 VAC is present and motor does not run,
		replace motor. WITH POWER OFF: turn blower
		wheel to check for locked rotor.
	Centrifugal Switch of Burner	Check for 24 VAC output from secondary of
	Blower Motor	transformer. If voltage is present, check for 24 VAC
		at pin 6 and the ground bar on ignition control and
		valve assembly. If the burner blower motor is
		running and there is no voltage at pin 6 and the
		ground bar on the ignition control valve, replace the
		burner blower motor.
For ovens with	Ignition Control and Valve	Check for 24 VAC supply to the ignition control and
Johnson Controls	Assembly	valve assembly at pin 6 and the ground bar. If
Ignition Control		voltage is present, check for 24 VAC across pin #1
(For ovens with		and the ground bar (pilot valve). If voltage is not
		present, replace electronic control package. If the
Honeywell Ignition		pilot valve is energized, check to see that the high
control, See Pg. 21)		voltage ignitor circuit is also energized. To check,
		disconnect the ignitor lead from the bottom of
		ignition control. Place female terminal of ignitor
		lead approximately 1/8" from terminal post on
		ignition control. Spark should jump the 1/8" gap. If
		no spark is present, replace ignition control.
	No Pilot	If the ignition control is supplied with 24 VAC, and
		the pilot valve (internal to valve assembly) and
		ignitor circuits are energized, visually check for pilot
		flame. This may be done by opening the small
		inspection door on the end of the burner, or by
		opening the main oven door and looking under the
		lower finger housings on the right side of the oven.
		If no pilot flame is visible, check the following.
	Pilot Shut-off Valve	Check to see that pilot shut-off valve is open (shut-
		off valve is located between ignition control and
		valve assembly and burner.)
	Pilot Tube	Check for gas pressure at pilot tube. Disconnect
		pilot tube at burner and connect manometer to pilot
		tube. If no gas pressure is present, check for
		blockage in pilot tube or pilot shut-off valve. If these
		are clear, and there is gas supplied to the oven,
		replace the ignition control and valve assembly.
	Pilot Orifice	If there is gas pressure at the pilot tube, check the
		pilot orifice for obstructions. Replace as need
	Burner Ignitor	Check the burner ignitor head for any obstructions,
		also check for frayed or broken wire, any type of
		damage to spark gap (.100 in. 2.5 m.m.) If there is
		visible damage, replace ignitor assembly.

Impinger I -–1000 Series Service Manual - Domestic 21