Lincoln 1100 Series service manual Relay, Main Fan

	Relay, Main Fan	Check if relay is operating and that the contacts r
		emain closed during the 20 minute cool down.
Main fan continues to	20 Minute Time Delay	NOTE: ON/OFF operation of fan switch
to run after cool down		will set the timer to 20 minutes. If the
		timer is accidentally reset, turn off main breaker for
		15 seconds to cancel. If 120 VAC continues to be
		present at terminals 2 and 3 after 20 minutes, replace
		the timer.
	Relay, Main Fan	Relay Contacts should open when the relay
		coil is de-energized.
No control box cooling	Main Fan	Check for main fan operation. If not operating, refer
		to “Oven Fan Will Not Run”.
	Relay,Oven Start	Check relay contacts. 120 VAC should be present.
	Cooling Fan Motor	120 VAC should be present at the fan motor. If
		voltage is present, check for opens or shorts.
		WITH POWER OFF: Check for locked rotor
		of the fan motor.
No automatic control	Thermostat, Cooling Fan	Check the cooling fan thermostat. box cooling
		(Thermostat closes at 120°F and opens at 100°F.)
		With the cooling fan thermostat pre-heated, check for
		continuity. If switch is open, replace.
	Cooling Fan Motor	120 VAC should be present at the fan
		motor. If voltage is present, check for
		opens or shorts.
		WITH POWER OFF: Check for locked
		rotor of the fan motor.
Control box cooling fan	Thermostat, Cooling	This normally open thermostat should
continues to run	Fan	close at 120°F (48.9°C) and reopen at
		100°F (37.8°C).
Oven will not heat	Main Fan Motor	Check for main fan operation. If it is not
		operating, refer to “Oven fan will not run”.
	Switch, Heat	With switch on, check for 120 VAC on
		both terminals to neutral. Replace if defective.
	Air Pressure Switch	This normally open switch should close
		when the main fan is activated. Adjust if
		necessary (Refer to Section D).
		Replace if defective.
	Temperature Control	Check for 120 VAC supply at terminal
		#11 to neutral on temperature control.
		Turn the temperature adjustment knob
		to maximum temperature position and
		check for 120 VAC at the load terminal
		(#9) and neutral. If 120 VAC is
		present and unit is not heating, refer
		to “Mercury Contactor” 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 D. C.
		millivolt output of these leads. Refer
		to thermocouple chart in Section D
		for proper readings. If these readings
		are not achieved, replace thermocouple.
	Temperature Control	WITH POWER OFF: remove the
	Potentiometer	potentiometer leads from the
42		Impinger II - 1100 Series Service Manual - International