Bunn Coffee Maker FPG Service Manual
GRINDERS
Includes: MHG, FPG,
FPG-2, LPG-2, G1, G2, G3,
G9, G9-2 & G9-2T DBC
NOTICE
The Service and Repair manual for the BUNN Grinder family, is currently in progress.
For your convenience, we have provided Electrical Schematic Diagrams on the following pages.
Thank you for your patience.
SERVICE & REPAIR MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To ensure you have the latest revision of the Operating Manual, or to view the Illustrated Parts
Catalog, Programming Manual, or Service Manual, please visit the Bunn-O-Matic website, at
www.bunn.com. This is absolutely FREE, and the quickest way to obtain the latest catalog and
manual updates. For Technical Service, contact Bunn-O-Matic Corporation at 1-800-286-6070.
.0000A 06/09 ©2009 Bunn-O-Matic Corporation
preliminary copy
SCHEMATIC WIRING DIAGRAM
G9-2 DBC, G9-2T DBC W/SMART FUNNEL™
N
W
H
I
B
L
K
L1
LEFT GATE
LIMIT THERMOSTAT
LIMIT THERMOSTAT
SOL
SOL
WHI/ORA
WHI/GRN
WHI/YEL
BLK
WHI
RED/BLK
J1-6
J1-6
J8-3
J8-1
J6-10
J6-5
J6-1
CONTROL PC BOARD
COIL
RELAY
RIGHT GATE
1
11
SHIELD
FUNNEL SENSOR
WHI/GRN
WHI/VIO
SWITCH UNIT ASSY
B2
C4
C5
C6
A2
A1
C3
C2
C1
GRINDER MOTOR
M
WHI
BLK
WHI/BLU
RELAY
CONTACTS
33734.0000G 02/05 © 2001 Bunn-O-Matic Corporation
Switch Unit Assembly Codes
A1 Grind
A2 Stop
B2 Hidden Button "Right"
C1 Large Batch Size "Left"
C2 Medium Batch Size "Left"
C3 Small Batch Size "Left"
C4 Large Batch Size "Right"
C5 Medium Batch Size "Right"
C6 Small Batch Size "Right"
120 OR 230 VOLTS AC
2 WIRE
SINGLE PHASE
50/60 HZ
WIRING DIAGRAMS
2
preliminary copy
SCHEMATIC WIRING DIAGRAM
G9-2 DBC, G9-2T DBC W/SMART FUNNEL™
N
W
H
I
B
L
K
L1
LEFT GATE
LIMIT THERMOSTAT
LIMIT THERMOSTAT
SOL
SOL
WHI/ORA
WHI/GRN
WHI/YEL
BLK
WHI
RED/BLK
J1-6
J1-6
J8-3
J8-1
J6-10
J6-5
J6-1
CONTROL PC BOARD
COIL
RELAY
RIGHT GATE
1
11
SHIELD
FUNNEL SENSOR
WHI/GRN
WHI/VIO
SWITCH UNIT ASSY
B2
C5
A3
A2
A1
C3
C2
GRINDER MOTOR
M
WHI
BLK
WHI/BLU
RELAY
CONTACTS
33734.0003A 02/05 © 2005 Bunn-O-Matic Corporation
120 OR 230 VOLTS AC
2 WIRE
SINGLE PHASE
50/60 HZ
Switch Unit Assembly Codes
A1 On/Off
A2 Grind
A3 Stop
B2 Hidden Button “Right”
C2 Hot Coffee “Full”
C3 Hot Coffee “Half”
C5 Iced Coffee
WIRING DIAGRAMS
3
preliminary copy
SCHEMATIC WIRING DIAGRAM
G9-2TB DBC W/SMART FUNNEL™
N
W
H
I
B
L
K
L1
LEFT GATE
LIMIT THERMOSTAT
LIMIT THERMOSTAT
SOL
SOL
WHI/ORA
WHI/GRN
WHI/YEL
BLK
WHI
RED/BLK
J1-6
J1-6
J8-3
J8-1
J6-10
J6-5
J6-1
CONTROL PC BOARD
COIL
RELAY
RIGHT GATE
1
11
SHIELD
FUNNEL SENSOR
WHI/GRN
WHI/VIO
SWITCH UNIT ASSY
A3
C4
C5
C6
A2
A1
C3
C2
C1
GRINDER MOTOR
M
WHI
BLK
WHI/BLU
RELAY
CONTACTS
33734.0004A 03/05 © 2005 Bunn-O-Matic Corporation
Switch Unit Assembly Codes
A1 Grind
A2 Stop
A3 On/Off
C1 Large Batch Size "Left"
C2 Medium Batch Size "Left"
C3 Small Batch Size "Left"
C4 Large Batch Size "Right"
C5 Medium Batch Size "Right"
C6 Small Batch Size "Right"
100 VOLTS AC
2 WIRE
SINGLE PHASE
50 HZ
WIRING DIAGRAMS
4
preliminary copy
SCHEMATIC WIRING DIAGRAM MHG
N
B
L
K
W
H
I
L1
RIGHT GATE
LEFT HOPPER SENSOR
LIMIT
THERMOSTAT
LIMIT
THERMOSTAT
WHI/YEL WHI/YEL
WHI/GRN
WHI/ORN WHI/ORN
YEL
ORN
YEL
ORN
BLK
WHI WHI
WHI
WHI
J5-5
J5-1
J12-1
J9-10
J9-5
J9-1
CONTROL PC BOARD
DISPLAY BOARD
RELAY
LEFT GATE
RIGHT HOPPER SENSOR
16
1
STATIC SHIELD
SWITCH UNIT ASSY
A2
C5
C6
C4
B2
B1
D3
D2
D1
C3
C2
C1
A1
GRINDER MOTOR
WHI
BLK
WHI/BLU
RELAY
CONTACTS
36399.0000D 08/05 © 2003 Bunn-O-Matic Corporation
100 VOLTS AC,
120 VOLTS AC,
240 VOLTS AC
2 WIRE
SINGLE PHASE
50/60 HZ
Switch Unit Assembly Codes
A1 Grind
A2 Stop
B1 Hidden Button "Left"
B2 Hidden Button "Right"
C1 Large Batch Size "Left"
C2 Medium Batch Size "Left"
C3 Small Batch Size "Left"
C4 Large Batch Size "Right"
C5 Medium Batch Size "Right"
C6 Small Batch Size "Right"
D1 "Digital" Left Hidden Button
D2 "Brewer" Center Hidden Button
D3 "Control" Right Hidden Button
FUNNEL SENSOR
VIO
VIO
J10-4
J10-1
J8-4
J8-1
ORN
YEL
GRN
BLU
SOL
SOL
COIL
M
GRN
GRN
GRN
J16-5
J16-1
MEMORY
BOARD
RED
WHI
GRN
BLK
P1
P2
P3
P4
P1, P2, P3 & P4 ARE
PINS OF A POLARIZED
FOUR-PIN CONNECTOR
WIRING DIAGRAMS
preliminary copy
5
27103.0000D 04/07 ©1996
BUNN-O-MATIC CORPORATION
SCHEMATIC WIRING DIAGRAM
LPG-2E, LPGB-2E
NL1
BLK
RED
WHI
100 VOLTS AC
120 VOLTS AC
2 WIRE
SINGLE PHASE
60 HZ
GRN
3
AMP
2
3
4
5
6
1
7
8
9
10
TIMER ASSY.
(Hopper Slide
Gate Timer
Dial Wiring)
Right - Brown
Left - Orange
YEL
WHI
BLU
YEL
WHI/BLK
BLK
RED
VIO
ORA
OFF/ON/START
SWITCH
RED
RED
RED
GRN
SELECTOR
SWITCH
WHI
RED
RED
WHI
BLK
GRINDER
SLIDE GATES
RT
SOL
LT
SOL
RED RED
M
WIRING DIAGRAMS
6
preliminary copy
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