Bunn G9-2T DBC - Manual (Page 15)

15
SERVICE (Cont.)
FIG. 1 BAG SENSOR SWITCH
P1704
Location:
The bag sensor switch is located inside the lower
front of the grinder housing behind the coffee dispens-
ing chute.
Test Procedure:
1. Disconnect the grinder and place a coffee bag
behind the dispense chute.
2. Remove the white/violet wire from the bag sensor
switch.
3. Check the voltage across the white/violet wire
from the bag sensor switch and the white wire,
red/black wire or red wire on the relay coil with
a voltmeter. Hold the Off/On/Start switch in the
“START” (lower) position and connect the grinder
to the power source. The indication must be:
a. 120 volts ac for two wire 120 volt models.
b. 230 volts ac for two wire 230 volt models.
c. 240 volts ac for two wire 240 volt models.
BAG SENSOR SWITCH (Models G1, G2, G3) or
CUP SENSOR SWITCH (MODEL G2 TRIFECTA)
4. Disconnect the grinder 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 grinder wiring
harness.
5. Check for continuity across the terminals on the
bag sensor switch.
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the wires from the switch.
2. Remove the two #8-32 keps nuts securing the bag
sensor assembly to the grinder housing.
3. Remove the two #2-56 screws, nuts and external
tooth lockwashers securing the switch to the bag
sensor assembly.
4. Mount the new switch to the bag sensor assembly
using two #2-56 screws, nuts and external tooth
lockwashers. Adjust the assembly by locating the
corner of the switch housing to the top edge of
the black metal mounting bracket.
5. Reattach the sensor assembly to the grinder hous-
ing and secure with two #8-32 keps nuts.
6. Refer to Fig. 2 when reconnecting the wires.
WHI/ORA to
Terminal “A”
on Relay
FIG. 2 BAG SENSOR SWITCH TERMINALS
WHI/VIO from
Off/On/Start
Switch
P1705
41545 072710