Electronic Control; Grinder Selector Switch; C A D - Bunn Dual TF Operating & Service Manual

SERVICE (cont.)
ELECTRONIC CONTROL ASSEMBLY (cont.)
10. Remove triac/heat sink from right tank mounting
bracket and discard.
11. Install new triac/heat sink assembly on right tank
mounting bracket.
12. Route the wires up around the rear of the brewer.
13. Reinstall the bottom cover, four feet, tank mount-
ing brackets and triac/heat sink to the bottom of
the tank using four #10-32 keps nuts.
14. Secure bottom cover to brewer base with twelve
#8-32 slotted head screws.
15. Stand the brewer upright.
16. Reconnect the wires of the new triac assembly.
Refer to the illustration below when reconnecting
wires.
WHI/VIO to Terminal Block (200V-240V Red Insert)
BLU to Right Tank Heater (Left)
BLU to Electronic Control #7
TAN to Tank Heater Switch

GRINDER SELECTOR SWITCH

Location:
The grinder selector switch is located in the
upper center on the front of the hood.
N
N ON
POR ATI
COR
U -MA TIC U.S .A.
N-O NOI S,
D BY BUN LD, ILLI TTS
B URE ING FIE S/N WA S : TZ
NUF ACT SPR ENT HER
MA AM E P PAT
WIR LOW ING
. FOL
DEL TS A.C F THE
MO VOL SE MO REO DIN G
PHA OR Y BE PEN
ER ONE S MA E S
D UND ENT
ERE ER PAT U R
COV OTH E D
MO RE O C
OR P R
ONE if
G si ze .
A T IN br ew
E R rv er s to
Se se
O P ck re fu
C he 5 ER
ew er s Br ew 0 F T W AT
1. Br
al d' re : 20 HO
on ra tu N
M cD IO
m pe ) UT
2. Te 8- 96 ! CA
(3 -1
N ER
U T IO CA NT
DE
C A D
AR
DI SC
! IF :
D
AC KE D
. CR TC HE Y
RA D DR Y EM PT
. SC EN AM E
. BO ILE WH H FL IC
AT ED HIG EC TR
. HE ON D EL RY
ED SE JU
TS . US PO S IN ATI ON
EN . OR EX SK TS RP OR
NT Y RI EM EN CO
CO T M PL EL MA TIC
NN EL E HO CO NN -O-
FU E TO 5 BU
AR 198
IL UR
FA
PN : 658
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove all wires from the switch terminals.
3. Place the selector switch in the left position.
4 Check for continuity across the center and right
terminals on the rear of the switch.
5. Continuity must not be present across the center
and left terminals on the rear of the switch.
6. Check the bottom row, then the top row of termi-
nals.
If continuity is present as described proceed to #7.
If Continuity is not present as described replace the
switch.
7. Place the selector switch in the right position.
8. Check for continuity across the center and left
terminals on the rear of the switch.
9. Continuity must not be present across the center
and right terminals on the rear of the switch.
10. Check the bottom row, then the top row.
If continuity is present as described, reconnect the
wires, the switch is operating properly.
If continuity is not present as described, replace the
P785
switch.
11. Refer to the illustration below when reconnecting
the wires.
P977
Page 25
PNK to PNK Lead from
Right Brew Selector Switch
PNK to PNK Lead from Interface Socket
PNK to PNK Lead from
Left Brew Selector Switch
P787
27124 050800