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SERVICE (cont.)
DILUTION SOLENOID VALVE
FIG. 10 DILUTION SOLENOID VALVE
P1277.40
Location:
Viewing the brewer from the rear the dilution so-
lenoid is mounted on the center of the solenoid mount-
ing bracket which is secured to the trunk base.
Test Procedure:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the
white/blue and white/violet wires on the dilution
solenoid terminals when the ON/OFF switch is in
the “ON” position and the start switch is momen-
tarily placed in the lower position. Connect the
brewer to the power source. After the approxi-
mate setting on the delay dial, the indication must
be:
a) 120 volts ac for two wire 120 volt models.
b) 240 volts ac for two wire 240 volt models.
c) 100 volts ac for two wire 100 volt models, re-
main for the approximate setting on the dilution
dial, and then return to its previous indication.
3. Disconnect the brewer from the power supply.
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. Remove both wires from the coil and check for
continuity across the coil terminals.
If continuity is present as described, reconnect the
white/blue and white/violet wires and proceed to #5.
If continuity is not present as described, replace the
solenoid valve.
5. Check the solenoid valve for coil action. Connect
the brewer to the power source, place the ON/OFF
switch in the “ON” position and momentarily place
the start switch in the lower position and release.
Listen carefully after the approximate setting on
the delay dial in the vicinity of the solenoid valve
for a “clicking” sound as the coil magnet attracts
and after the approximate setting on the dilution
dial, repels the plunger.
6. 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 or after 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:
1. Remove all wires from the solenoid valves.
2. Turn off the water supply to the brewer.
3. Disconnect the water lines to and from the sole-
noid valves.
4. Remove the two 8-32 keps nuts holding the
mounting bracket to the trunk base.
5. Lift out the bracket.
6. Remove the two 10-32 slotted-head screws hold-
ing the solenoid valve to the mounting bracket.
7. Securely install the new solenoid valve to the
mounting bracket.
8. Attach the mounting bracket to the trunk base.
9. Securely fasten the water lines to and from the
solenoid valves.
10. Refer to Fig. 11 when reconnecting the wires.
10225 031804
FIG. 11 SOLENOID VALVE TERMINALS
P1278
BREW
SOLENOID
DILUTION
SOLENOID
SWEETENER
SOLENOID (Optional)
WHI/VIO to Dilution
Solenoid
WHI/GRN to
Brew Timer TL4
WHI/VIO to Brew Solenoid
WHI/VIO to Brew Timer TL1
WHI/BLU to Dilution
Timer TL4
WHI/VIO to Dilution
Solenoid
BRN/WHI to Selector
Switch