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Page 28
If voltage is present as described, proceed to #8.
If voltage is not present as described, refer to the
wiring diagram and check the brewer wiring harness.
8. Disconnect the black and white wires to the swing
arm switch and pump leads.
9. With a voltmeter check the voltage across the
black and white wires when the "ON/OFF" switch is
in the "ON" (upper) position and the start switch
pressed to the start position and released. Connect
the brewer to the power source. The indication
must be 230 volts ac.
If voltage is present as described, the brew timer is
operating properly. Reset the timer dial as required, to
obtain the desired brew volume.
If voltage is not present as described, replace the
timer.
Removal and Replacement:
1. Disconnect the male connector on the timer from
the female connector on the main wiring harness.
2. Disconnect the timer leads from the swing arm
switch lead and pump lead.
3. Disconnect the three pin connector from the HALF/
FULL batch selector switch to the three pin plug on
the brew timer.
4. Remove the two #8-32 screws securing the brew
timer to the component bracket and remove timer.
5. Position new timer on the component bracket and
secure with two #8-32 screws.
6. Refer to Fig. 30 and reconnect the wires.
To Three Pin Female
Connector on Main
Harness
BLK to Swing Arm
Switch Lead
WHI to RED Pump
Lead
Three Pin Connector from
Half/Full Batch Switch
FIG. 28 TIMER TERMINALS
P1751
Location:
The timer is located behind the front access panel
on the right side of the component bracket.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the polarized, three pin connector from
the brewer main harness and rotate the brew timer
dial fully counterclockwise.
3. With a voltmeter check the voltage across sockets
P2 and P3 (black and red wire) of the female
connector on the main wiring harness when the
"ON/OFF" switch is in the "ON" (upper) position.
Connect the brewer to the power source. The
indication must be 230 volts ac.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the
wiring diagram and check the brewer wiring harness.
5. With a voltmeter check the voltage across the
sockets P1 and P2 (blue and black wires) of the
female connector on the main harness when the
"ON/OFF" switch is in the "ON" (upper) position and
the start switch pressed. Connect the brewer to the
power source. The indication must be 230 volts ac.
6. Disconnect the brewer from the power source.
7. Reconnect the three pin connector from the main
wiring harness to the connector on the timer.
TIMER
FIG. 27 TIMER
P2114.40
1
2
3
4
5
.5
MINUTES
BUNN-O-MATIC
P/N 2235-120 VAC
SERVICE (cont.)
EARLY MODELS
EARLY MODELS
10067.3 070102