Lincoln 1400 Series service manual Electric Ovens, Troubleshooting Guide

TROUBLESHOOTING GUIDE

ELECTRIC OVENS

IMPINGER ADVANTAGE SERIES

SYMPTOM	POSSIBLE CAUSE	EVALUATION
Oven fan will not run	Incoming Power Supply	Check breakers/Reset if required. Call Power Co. if
		needed.
	Oven Fan Fuse	Check and/or Replace
	Fuse Holder	Check and/or Replace
	Fan Switch	Check continuity between switch terminals.
		For these oven models, there is a control circuit step-
	1454-1455	down transformer. This transformer steps down
		supply voltage to 120 VAC. If main fan will not run, the
		secondary of this transformer must be checked for
		120 VAC output. Check specific oven model
		schematic for circuit location.
	Main Relay	Check continuity to 120 VAC coil. Check for power to
		the relay coil,(120 VAC). Check for 120/208/220/240
		VAC to relay terminals. Visually check for contact pull-
		in.
	Fan Motor	Check for opens, shorts, or ground. WITH POWER
		OFF: Turn Fan Blade to check for locked rotor.
	Capacitor	Check for opens, shorts, or grounds.
No control box	Main Fan Relay	Check for power to main fan relay. Visually check for
cooling		contact pull-in.
	Axial Cooling Fan	WITH POWER OFF: turn fan blade to check for
		locked rotor. Check for power to cooling fan. If voltage
		is present at the fan motor and the fan does not run,
		replace fan assembly.
No automatic control	Incoming Power Supply	Check circuit breakers, reset if required, call Power
box cooling		Company if needed.
	Cooling Fan Thermostat	Thermostat is normally open and closes at 120°F ± 3
		(48.9°C ± 7°), and opens at 100°F ± 3°F (37.8°C ±
		1.7°C).
Oven will not heat	Main Oven Fan	Check if main oven fan is operating. If not, refer to
		"Oven fan will not run". Page 18.
	Centrifugal Switch (Main Fan)	Check for 120 VAC on both sides of switch. If voltage
	Model 1452-1453	is present on one side only and motor is running,
		replace motor.
	Air Pressure Switch	This normally open switch should close when the
	(1454-1455)	main fan is activated. If adjustment is necessary
		(Refer to page 28). Check tube for blockage. Replace
		if defective.
	Hi Limit Thermostat (Oven	Terminals are normally closed. If open, reset and test
	Cavity)	oven for proper operation. If thermostat will not hold
		for maximum oven temperature, and oven is not
		exceeding temperature dial setting, replace
		thermostat.
	Control Box High Limit	Terminals are normally closed, but open at 130°F ±
	Thermostat	5°F (53.9°C ± 2.8°C). Check for over heating and
		reset thermostat. Test for proper operation. If it will not
		reset and hold, then replace.

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