Timer (Early Models) - Bunn SRU Operating & Service Manual

SERVICE (cont.)

TIMER (Early Models)

EARLY MODELS
FIG. 27 TIMER
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 (white and black wire or red wire) of the
female connector on the main wiring harness when
the "ON/OFF" switch is in the "ON" (upper) position.
See chart below for P2 and P3 wires:
MODEL
SRU-CE
SRUA
SRU
Connect the brewer to the power source. The indi-
cation must be:
a) 120 volts ac for 3-wire 120/208 volt and 120/240
volt models.
b) 208 volts ac for 2-wire 208 volt models.
c) 240 volts ac for 2-wire 240 volt models.
d) 230 volts ac for 2- wire 230 volt CE models.
P2114.40
P2 P3
BLK RED
RED BLK
WHI BLK
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
diagrams and check the brewer wiring harness.
5. With a voltmeter check the voltage across the sockets
P1 (BLU) and P2 (see chart in #3) 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:
a) 120 volts ac for 3-wire 120/208 volt and 120/240
volt models.
b) 208 volts ac for 2-wire 208 volt models.
c) 240 volts ac for 2-wire 240 volt models.
d) 230 volts ac for 2-wire 230 volt CE models.
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.
If voltage is present as described, proceed to #8.
If voltage is not present as described, refer to the wiring
diagrams and check the brewer wiring harness.
8. Disconnect the black and white wires to the
pump.
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:
a) 120 volts ac for 3-wire 120/208 volt and 120/240
volt models.
b) 208 volts ac for 2-wire 208 volt models.
c) 240 volts ac for 2-wire 240 volt models.
d) 230 volts ac for 2-wire 230 volt CE models.
If 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.
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