Bunn TWF-EZ Coffeemaker User Manual


 
Page 20
FIG.11 TEA/OFF/COFFEE SWITCH TERMINALS
P1525
SERVICE (cont.)
TEA/OFF/COFFEE SWITCH
FIG. 10 TEA/OFF/COFFEE SWITCH
P1808.40
Location:
The TEA/OFF/COFFEE switch is located in the front
of the hood, above and to the left of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the black and white/violet wires from the
switch terminals.
3. With a voltmeter, check the voltage across the
black wire removed from the TEA/OFF/COFFEE
switch and the white/green wire remaining on the
switch terminal.
4. Connect the brewer to the power source.The indi-
cation must be 120 volts ac.
5. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wir-
ing Diagram
and check the wiring harness.
6. Viewing the switch from the rear, check for conti-
nuity across the center and left terminals of the
top row when switch is in the "TEA" position and
the center and right terminals of the top row when
the switch is in the "COFFEE" position.
7. Viewing the switch from the rear, check for conti-
nuity across the center and left terminals of the
second row from the bottom when switch is in
the "TEA" position. Also check for continuity across
the center and right terminals of the second row
from the bottom when the switch is in the "COF-
FEE" position.
8. Viewing the switch from the rear, check for conti-
nuity across the center and left terminals of the
bottom row when switch is in the "TEA" position.
Also check for continuity across the center and
right terminals of the bottom row when the switch
is in the "COFFEE" position.
If continuity is present as described, replace 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 terminals.
2. Compress the clips inside the hood and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold the switch captive in the hood.
4. Refer to FIG. 11 when reconnecting the wires.
WHI/VIO to
Board J1-8
WHI/BLU to
Tea Solenoid
WHI/RED to
Coffee Solenoid
WHI/GRN to
Board J1-4
WHI/VIO to
Board J1-8
ORA to
Board J3-1
BLK to
Board J1-7
YEL to
Board J3-3
VIO to
Board J3-2
29466 082200