Brewer Selector Switch - Bunn Single SH Operating And Service Manual

SERVICE (cont.)
BREW SELECTOR SWITCH
U T
C A
!
T S
E N
N T
C O O T
E L M P
N N E H C O
F U A R
T O
R E
IL U
F A
: 65 8
PN
FIG. 4 BREW SELECTOR SWITCH
Location:
The brew selector switch is located in the f r o n t
right side of the hood.
Test Procedure:
Timer:
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 con-
necter 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.
All manuals and user guides at all-guides.com
E R
A T
T W
H O
N
U T IO
C A
!
N E R
N T
IO C A
D E
R D
C A
D IS
IF :
C K ED Y
R A H ED PT
. C TC Y EM E
R A DR H EN A M IC
. SC ED FL TR
O IL D W G H EC
. B TE N HI D EL
EA D O
. H SE
. U SE PO R Y
R EX TS
. O EN JU
EM IN IO N
EL K S AT
R IS RP OR
CO
L Y IC
-M AT
NN -O
BU
85
19
Grinder Interface:
7. Disconnect the pink, gray and tan wires on the
selector switch from the pink, gray and tan wires
on the interface socket.
8. 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.
9. 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.
10. Reconnect the pink, gray and tan wires on the
selector switch to the pink, gray and tan wires on
the interface.
P1357
Bypass Valve:
11. Disconnect the white/violet wire on the selector
switch from the bypass valve coil and disconnect
the white/red wire from the dispense valve coil.
12. Attach an ohmmeter across white/violet and white/
red wires. When the selector is in the small batch
position, continuity should not be present. When
the selector is in the medium or large batch posi-
tions, continuity should be present
13. Reconnect the white/violet wire to the bypass
valve coil and the white/red wire to the dispense
valve coil.
Page 16 28230 092200