Bunn T6A - Manual (Page 17)

Page 17
BREW TIMER
FIG. 4 BREW TIMER P1833
Location:
The brew timer is located in the hood. It consists
of the left dial plate and circuit board.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the wires from terminals TL3, TL4, & TL5
of the timer and rotate the dial fully counterclock-
wise.
2. With a voltmeter, check the voltage across termi-
nals TL1 and TL2 when the ON/OFF or SELECTOR
switch is in the “ON” (T3 left, T6 left or right) po-
sition. Connect the brewer to the power source.
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.
3. Disconnect the brewer from the power source.
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. Check for continuity across the white/orange and
white/yellow wires when the start switch is held
in the lower position.
If continuity is present as described, refer to Fig. 5
and reconnect the wires to terminals TL3, TL4, & TL5
of the timer board and proceed to #5.
If continuity is not present as described, refer to the
Wiring Diagrams and check the wiring harness.
5. Check the voltage across terminals TL1 and TL4
with a voltmeter when the ON/OFF or SELECTOR
switch is in the “ON” (T3 left, T6 left or right) po-
sition and the start switch is momentarily placed
in the lower position. Connect the brewer to the
power source. The indication must be:
a) 120 volts ac for two wire 120 volt models for
approximately twenty seconds and then return
to its previous indication.
b) 240 volts ac for two wire 240 volt models for
approximately twenty seconds and then return to
is previous indication.
c) 100 volts ac for two wire 100 volt models for
approximately twenty seconds and then return to
its previous indication.
6. Disconnect the brewer from the power source.
If voltage is present as described, the timer is operat-
ing properly. Adjust the timer dial as required.
If voltage is not present as described, replace the timer.
Removal and Replacement:
1. Remove all wires from the timer.
2. Remove the circuit board and dial plate from the
brackets.
3. Install the new timer circuit board as described in
the Late Model Timer Section.
4. Refer to Fig. 7 when reconnecting the wires.
5. Install the Timer Setting Decal, provided with the
timer replacement kit, to the rear of the schematic,
on the top cover.
5. Adjust the timer as required. Refer to Late Model
Timer Section.
FIG. 5 BREW TIMER TERMINALS
10145 072600
OLD STYLE
WHI to Power Cord (100V & 120V)
or RED to Power Connector (240V)
WHI to Dilution Timer (100V & 120V)
or RED to Dilution Timer (240V)
WHI/VIO to Dilution Timer
WHI/VIO to ON/OFF Switch
WHI/ORN to Start Switch
WHI/GRN to Brew Solenoid
WHI/YEL to Start Switch
PNK to Selector Switch
(Half Batch Option Only)
GRY to Selector Switch
(Half Batch Option Only)
P1279
SERVICE (cont.)