Bunn twf-ez service manual SERVICE cont, Brew Solenoid Valve Hot Coffee

SERVICE (cont.)
BREW SOLENOID VALVE (HOT COFFEE)		6.	Check the hot coffee solenoid valve for coil ac-
			tion. Connect the brewer to the power source. With
			TEA/OFF/COFFEE switch in the "COFFEE" position
			press the start switch and listen carefully in the
			vicinity of the solenoid valve for a "clicking" sound
			as the coil magnet attracts.
		7.	Disconnect the brewer from the power source.
		If the sound is heard as described and water will not
		pass through the solenoid valve, there may be a block-
		age in the water line before the solenoid valve or, the
		solenoid valve may require inspection for wear, and
		removal of waterborne particles.
		If the sound is not heard as described, replace the
		solenoid valve.
		Removal and Replacement:
	P1960.60	1.	Remove all wires from solenoid valves.
		2.	Turn off the water supply to the brewer.
	FIG. 2 HOT COFFEE BREW SOLENOID VALVE
		3.	Disconnect the water lines to and from the sole-
Location:			noid valves.
	Viewing the brewer from the rear the hot coffee	4.	Remove the two #8-32 keps nuts holding the
brew solenoid valve is mounted on the left side of the			mounting bracket to the brewer base.
mounting bracket.		5.	Lift out the bracket.
		6.	Remove the two #10-32 slotted-head screws hold-
Test Procedures:			ing the hot coffee solenoid valve to the mounting
1. Disconnect the brewer from the power source.			bracket.
2. Disconnect the white/red and white wires from the		7.	Securely install the new hot coffee solenoid valve
	hot coffee solenoid valve. With the TEA/OFF/COF-		to the mounting bracket.
	FEE switch in the "COFFEE" position press the start	8.	Attach the mounting bracket to the brewer base.
	switch.	9.	Securely fasten the water lines to and from the
3.	With a voltmeter, check the voltage across the		solenoid valves.
	white/red and white wires. Connect the brewer to	10.	Refer to Fig. 3 when reconnecting the wires.
	the power source. The indication must be 120 volts
	ac.
4. Disconnect the brewer from the power source.			WHI to Main
			Harness

If voltage is present as described, proceed to #5.

If voltage is not present as described, refer to Wiring

Diagram and check brewer wiring harness.

5. Check for continuity across the hot coffee sole-	WHI/RED
	to Switch HOT COFFEE
noid valve coil terminals.	BREW SOLENOID
If continuity is present as described, reconnect the	WHI/BLU	ICED TEA BREW
		SOLENOID
white/red and white wires to the solenoid.	to Switch
		SOLENOID
		DILUTION
If continuity is not present as described, replace the			P1364
solenoid valve.	FIG.3 SOLENOID VALVE TERMINALS
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