Bunn AFPO-2 Manual Do Utilizador

16

FIG. 16 SOLENOIDS

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
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.

FIG. 17 SOLENOID TERMINALS

P1521

P1544

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
blockage 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 sole-

noid 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.

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

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

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