Service - Bunn LPG Operating & Service Manual

SERVICE

This section provides procedures for testing and
replacing various major components used in this
grinder should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The grinder should be unplugged
when servicing, except when electrical tests are re-
quired and the test procedure specifically states to
plug-in the grinder.
Component Access
WARNING - Unplug the grinder before the removal of
any panel or the replacement of any component.
All components are accessible by the removal of
the hopper and the rear panel.
FIG. 1 HOPPER REMOVAL
Remove all the coffee beans from the hopper. On
Model LPG equipped with Hopper Burr Guard, remove
the two screws attaching the guard to the motor cover.
Remove the four #8-32 screws securing hopper to
hopper housing. Lift hopper, lid and hopper divider
(LPG-2E only) as an assembly over the motor assem-
bly.
FIG.2 REAR PANEL REMOVAL
Remove the four #8-32 screws securing the rear
panel and knob cover for Model LPG-2E, to the hop-
per housing. On Model LPG-2E, let the rear panel hang
by the orange and brown wires from the timer board.
CONTENTS
Capacitor ................................................................ 9
Circuit Breaker ........................................................ 9
Dechaffer .............................................................. 10
Hopper Selector Switch ........................................ 10
Motor .................................................................... 11
Off/On/Start Switch ............................................... 14
Solenoids .............................................................. 14
Timer .................................................................... 16
Wiring Schematics................................................ 18
Capacitor (Model LPG)
P1033
8
WARNING
SCHEMATIC WIRING DIAGRAM
Use only on a properly protected circuit
LPG2E
L1
capable of the rated load. GRN
BLK
Electrically ground the chassis. 3
AMP
Follow national/local electrical codes. GRN
1
Do not use near combustibles.
2
TIMER ASSY. 3
BLU
(Hopper Slide 4
YEL
An extension cord, when used, must be shorter Gate Timer
5
Dial Wiring) WHI/BLK
6
Right - Brown BLK
than 20 feet if 16-gage 3-conductor wire, or 7
Left - Orange RED
8
VIO
shorter than 10 feet if 18-gage 3-conductor wire. 9
ORA
10
OFF/ON/START
FAILURE TO COMPLY RISKS EQUIPMENT SWITCH RED
RED RED
DAMAGE, FIRE, OR SHOCK HAZARD
YEL
READ THE ENTIRE OPERATING MANUAL
120 VOLTS AC
INCLUDING THE LIMIT OF WARRANTY AND 27103.0000C 11/98 © 1996
2 WIRE
BUNN-O-MATIC CORPORATION
LIABILITY BEFORE BUYING OR USING THIS PRODUCT
SINGLE PHASE
60 HZ
20545-0000 7/90 © 1990 Bunn-O-Matic Corporation
FIG. 3 CAPACITOR
N
SELECTOR
SWITCH
WHI
WHI
BLK
GRINDER
WHI
RED M
RED
RED
RT RED
SOL
SLIDE GATES
LT RED
SOL
WHI
P1034
P1745
27091 111598