Lincoln 1400 Series service manual Code

	Thermocouple Probe	Remove thermocouple leads from the temperature
		control board, and measure the millivolt output of
		these leads. Refer to charts on page 25 in the
		adjustment section for proper readings.
	Temperature Control	Turn temperature control dial to full "on" position.
		NOTE: Thermocouple must be connected. Measure
		for 120 VAC across terminals "N.O." and Com., if
		voltage is not present; replace control.
	Solenoid Valve	If voltage is present at terminals "N.O." and Com.,
		check for voltage at solenoid valve. If voltage is
		present, listen for valve to open and close. Also,
		check for opens and shorts in coil. If solenoid valve is
		defective, replace.
Intermittent Heating	AS FOLLOWS	Both the main fan motor and burner blower motor are
		equipped with thermo-protection and will cease to
		operate when not cooled properly. This can cause
		the units to cycle on and off intermittently. Also, most
		of the problems listed under "oven will not heat" can
		cause intermittent failures.

For continuing intermittent problems, a series of test lights may be made and installed in the ovens. The lights will allow the customer to advise the service technician a trouble code when the oven fails

The lights should be connected in the following manner:

Light#1 attached in 120 VAC line after oven fan switch.

Light #2 attached after 120 VAC contacts of oven motor centrifugal switch

Light #3 in 24 VAC Burner Transformer Secondary.

Light #4 in 24 VAC at terminal #6 of Ignition control valve.

Light #5 in 24 VAC at terminal #3 of Ignition control valve.

Light #6 in 24 VAC at terminal #1 of Ignition control valve.

CODE:

All lights off - lights of main power, main fan off, oven fan switch out.

1 on 2 off 3 off 4 off 5 off 6 off - Oven Motor Centrifugal Switch open

1 on 2 on 3 on 4 off 5 off 6 off - Burner Motor Centrifugal Switch bad.

1 on 2 on 3 on 4 on 5 0ff 6 off - Ignition Control bad

1 on 2 on 3 on 4 on 5 on 6 off - Pilot Shield missing or warped, no flame rectification, Pilot

-Orifice plugged, or Gas Control Valve bad.

1on 2 on 3 on 4 on 5 on 6 on - Unit still not working Main Orifice plugged, Gas Valve bad,

-Temperature Control bad.

-However, Main Orifice would not be intermittent problem.

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.
	3 Amp Fuse	This control fuse is located on the front panel.
		Replace if defective.
	Fuseholder	Check and/or replace.
	Fan Switch	See procedure for checking on page 11.
	Speed Adjustment	This is a 0 to 10 K ohm, 1 turn potentiometer. With
	Potentiometer	power off, remove the black and white pot leads from
		the motor control board at terminals P1, P2. Place the
		meter leads on the black lead (P2) and on the white
		lead (P1). Rotating the pot., slowly, from low to high,
		the meter reading should show an even transition
		from 0 to 10K ohms ± 5%. There should be no dead or
		open spots through out the 1 turn of the pot. Check
		both leads to ground. There should be no continuity to
		ground. If any of the above checks fail, replace the
		pot.

Impinger I – 1400 Series Advantage Service Manual – Dom & Int’l 13