Bunn TWF service manual SERVICE cont, BREW TIMER HOT COFFEE- Early Models

SERVICE (cont.)	If continuity is not present as described, refer to the
BREW TIMER (HOT COFFEE- Early Models)	Wiring Diagrams and check the wiring harness.
	5. With a voltmeter, check the voltage across termi-
	nals TL1 and TL4 when the TEA/OFF/COFFEE
	switch is in the “COFFEE” position and the START
	switch is momentarily placed in the lower posi-
	tion. Connect the brewer to the power source.
	The indication must be 120 volts ac for two wire
	120 volt models and three wire 120/208 volt mod-
	els for approximately twenty seconds and then re-
	turn to its previous indication.
	6. Disconnect the brewer from the power source.
	If voltage is present as described, the timer is operat-
	ing properly. Adjust the timer dial as required.
	If voltage is not present as described, replace the timer.
	Removal and Replacement:
P1961.60	1. Remove all wires from the timer.
	2. Remove the circuit board and dial plate from the
FIG. 6 HOT COFFEE BREW TIMER
	brackets.
Location:
	3. Install the new timer circuit board as described in
The hot coffee brew timer is located in the hood on
	Late Model Timer section on the following pages.
the left side. It consists of a dial plate and circuit board.
	4. Refer to Fig. 9 when reconnecting the wires.
Test Procedure:	5. Install the Timer Setting decal, provided with the
	replacement timer kit, to the rear of the schematic,
1. Disconnect the brewer from the power source.
	on the top cover.
2. Remove the wires from terminals TL3, TL4, & TL5
	6. Adjust the timer as required. Refer to Late Model
of the timer and rotate the dial fully counterclock-
	Timer section on the following pages.
wise.
2. With a voltmeter, check the voltage across termi-	WHI to Power Cord (120V Models)
nals TL1 and TL2 when the TEA/OFF/COFFEE
	or WHI to Terminal Block (120/208V
switch is in the “COFFEE” position. Connect the	Models)
brewer to the power source. The indication must	WHI/RED to Hot Coffee Solenoid
be 120 volts ac for two wire 120 volt models and
	WHI/RED to TEA/OFF/COFFEE Switch
three wire 120/208 volt models.
3. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #4.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
4. Check for continuity across the white/orange and
white/yellow wires when the START switch is held	WHI/YEL to START Switch
in the lower position.
	WHI/GRN to Hot Coffee
If continuity is present as described, reconnect the	Solenoid
	WHI/ORA to START Switch	P1962
wires to terminals TL3, TL4, & TL5 of the timer board	OLD STYLE
and proceed to #5.	FIG. 7 HOT COFFEE BREW TIMER TERMINALS
		10510	071000
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