Bunn AFPO-3 SL manual Solenoids, 3 #3 AFPO-3 ONLY, SERVICE cont

SERVICE (cont.)

SOLENOIDS
		1
		2
		3
	1
	1
	2
2	3
3
FIG. 16 SOLENOIDS		P1521

Location:

The solenoids are located inside the autofill box.

Test Procedure:

1.	Disconnect the dispenser from the power source.
2.	Disconnect the white/violet, violet or blue wire and
	the white wire from the solenoid.
3.	Connect the dispenser to the power source. Press
	the solenoid (water) switch, and with a voltmeter,
	check the voltage between the white wire, and either
	the blue, violet, or white/violet wire. The indication
	must be:
	a) 120 volts ac for two wire 120 volt models.
	b) 200 to 240 volts ac for two wire 200 or 240 volt

6.Check the solenoid valve for coil action. Connect the dispenser to the power source. Press the solenoid (water) switch and listen carefully in the vicinity of the solenoid valve for a “clicking” sound as the coil magnet attracts.

7.Disconnect the dispenser 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 inlet 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, rebuild or replace the solenoid valve.

Solenoid Valve Repair:

1.Remove the wires from the solenoid valve to be repaired.

2.Turn off the water supply to the dispenser.

3.Remove the nut securing solenoid valve coil to the base.

4.Remove guide, washer, o-ring, plunger/spring and inspect for wear. Replace parts as required.

5.Install new o-ring in the solenoid valve base.

6.Install plunger/spring in the guide with spring to the bottom of the guide.

7.Install guide with the plunger/spring into the solenoid valve base.

8.Install washer on guide.

9.Install coil with retainer on guide and secure with nut.

10.Refer to Fig. 17 and reconnect the wires.

models.

c) 230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

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

If voltage is not present as described, refer to the Wiring Diagrams and check dispenser wiring harness.

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, refer to Fig. 17 and reconnect the wires to the solenoid.

If continuity is not present as described, replace the solenoid valve.

WHI from Main Harness WHI to Solenoid #2 BLU from Solenoid Switch #1

#1 AFPO-2 & 3 #2 AFPO-2

&3 #3 AFPO-3

ONLY

WHI to Solenoid #1 WHI to Pump #1 VIO from Solenoid Switch #2

WHI/VIO from Solenoid Switch #3

WHI to Main

Harness

WHI to Pump #3

FIG. 17 SOLENOID TERMINALS P1544

16 41093 040408