Brew Selector Switches - Bunn DUAL SH Operating & Service Manual

SERVICE (cont.)
BREW SELECTOR SWITCH
FIG. 4 BREW SELECTOR SWITCH
Location:
The brew selector switches are located in the
front left and right side of the hood.
Test Procedure:
Timer: Left or Right
1. Disconnect the brewer from the power supply.
2. Separate the connector on the selector switch
harness from the brew timer circuit board.
3. Carefully slide the plastic cover off of the connec-
tor from the switch harness.
4. Check for continuity across the pink and tan wires
on the connector when the switch is in the 1/2
gallon position. Continuity must not be present in
any other switch position.
5. Check for continuity across the pink wire and gray
wire when the switch is in the 1 gallon position.
Continuity must not be present in any other posi-
tion.
6. Reattach the connector to the brew timer circuit
board.
N N R R
N TE N TE
IO IO C A C A
U T U T D E D E
R D R D
C A C A C A C A
D IS D IS
! IF : IF :
D D
KE KE D D Y Y
AC AC HE HE PT PT
. CR . CR TC TC Y Y EM EM E E
. SC . SC RA RA DR W HE W HE DR N N AM AM IC IC
IL ED IL ED FL FL TR TR
. BO . BO ED ED HI HI GH GH EC EC
AT AT ON ON D D EL EL
. HE . HE SE SE
. US . US ED ED PO PO R Y R Y
EX EX TS TS JU JU
. OR . OR EN EN IN IN ION ION
N TS N TS EM EM K S K S OR OR AT AT
N TE N TE EL EL R IS R IS RP RP
C O C O IC IC CO CO
O T O T M P M P LY LY AT AT
E L E L E H E H -O -O -M -M
N N N N C O C O BU BU NN NN
FU FU A R A R TO TO 85 85
R E R E 19 19
IL U IL U
FA FA
: 65 : 65 8 8
PN PN
Grinder Interface: Left or Right:
7. Disconnect the gray and tan wires on the selector
switch from the gray and tan wires on the interface
socket.
8. Disconnect the pink wire on the selector switch
from the grinder switch.
9. Check for continuity across the pink wire and tan
wire on the selector switch when the switch is in
the 1/2 gallon position. Continuity must not be
present in any other position.
10. Check for continuity across the pink wire and gray
wire on the selector switch when the switch is in
the 1 gallon position. Continuity must not be
present in any other position.
11. Reconnect the gray and tan wire on the selector
switch to the gray and tan wires on the interface
socket.
12. Reconnect the pink wire on the selector switch to
the grinder switch.
P2214
Bypass Valve: Left or Right
13. Disconnect the white/violet on the selector switch
from the bypass valve coil and disconnect the
white/red from the dispense valve coil.
14. Check for continuity across the white/violet and
the white/red wires when the selector is in the 1
gallon, 1-1/2 gallon or 1-3/4 gallon position.
Continuity must not be present in any other posi-
tion.
15. Reconnect the white/violet to the bypass valve coil
and white/red to the dispense valve coil.
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