Page 2 - SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.
2 BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows: 1) All equipment other than as specified below: 2 years parts and 1 year labor. 2) Electronic circuit and/or control boards: parts and labor for 3 years. 3) Compressors on refrige...
Page 3 - CONTENTS
3 CONTENTS Warranty and Trademark .................................................................................................3 Introduction ....................................................................................................................4 Recommended Daily Cleaning ............
Page 4 - INTRODUCTION; when adding beans. Use only with whole bean coffee.; CAPACITY CHART; Operating Manuals for CLEANING.
4 INTRODUCTION The Grinder will store various amounts of whole bean coffee and grind it to a preset grind and amount into an awaiting funnel and filter or French Press from most commercial drip coffee brewers. The equipment is only for indoor use on a sturdy counter or shelf. Adequate space must be ...
Page 5 - Figure 1; Step 2 - Remove & discard two silicon tubes between funnel guide &; Figure 3; WARNING; MUST BE COMPLETED BY AUTHORIZED SERVICE PERSONNEL.
5 41545 111711 Figure 1 Step 1 - Remove & discard tape holding funnel arm in place. (Figure 1) Step 2 - Remove & discard two silicon tubes between funnel guide & housing. (Figure 2) Step 3 - Remove four screws in front housing panel. (Figure 3) Step 4 - Remove & discard shim under tr...
Page 6 - OPERATING CONTROLS
6 Model G9-2 Off/On/Start Switch OFF - (upper position) Switching to this position stops all operation of the grinder. ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grinding has ceased. START - (lower, momentary po...
Page 7 - Model G9; position after grinding has ceased.; Grind Selector; Do not attempt to bypass this safety device.; LEFT
7 URN O F F S T A R T ON CARAFE P1300 Batch Selector Switch (Optional) URN - Switching to this position allows the correct amount of beans to be dispensed when grinding a large batch. CARAFE - Switching to this position allows the correct amount of beans to be dispensed when grinding a small batch. ...
Page 8 - Refer to the Installation & Operating Manuals for Adjustments.; Pressing the ON/OFF pad alternately turns the grinder on and off.; Control Board; Refer to the Installation & Operating Manuals for Adjustments.
8 Model G9-2T DBC Grind Pad (a) Pressing initiates a timed grind cycle. Stop Pad (b) Pressing ends the operation of the grinder. ® PAD (c) Pressing the ® pad allows programming access. OPERATING CONTROLS (Continued) PANTONE Red 032 CV PANTONE 430 CVC PANTONE 432 CVC PANTONE 354 CVC PANTONE Black C d...
Page 9 - Model FPG; GRIND initiates a timed grind cycle.
9 OPERATING CONTROLS (Continued) P2947 P2947 Model FPG Off/On/Start Switch OFF - (upper position) Switching to this position stops all operation of the grinder. ON - (middle position) The switch will return to this position after a grind cycle has begun and will remain in this position after grindin...
Page 10 - TROUBLESHOOTING
10 TROUBLESHOOTING A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department. • Inspection, testing, and repair of elec...
Page 14 - SERVICE; Troubleshooting for assistance in determining the; Component Access; WARNING - Unplug the grinder before the removal of; Component Locations
14 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 sh...
Page 16 - AC MOTOR AND GRIND CHAMBER
16 SERVICE (Cont.) AC MOTOR AND GRIND CHAMBER FIG. 3 AC MOTOR AND GRIND CHAMBER P1704 Location: The motor is located inside the upper part of the grinder housing. Test Procedure: 1. Remove the plug located on the right side of the housing. Press the red “Reset” button visible through the opening. Li...
Page 18 - FIG. 5 GRIND CHAMBER COMPONENTS; NOTE: Burrs are serviced in sets of two with hardware.; NOTE: Refer to ADJUSTMENTS in the Installation and Op-
18 SERVICE (Cont.) FIG. 5 GRIND CHAMBER COMPONENTS P1708 20 7 6 4 5 16 18 1 19 17 11 10 9 8 3 2 1 13712 14 15 AC MOTOR AND GRIND CHAMBER (cont.) Removal and Replacement - Grind Chamber - Fig. 5: 1. Loosen the two set screws (16) securing the grind selector knob to the grind selector dial plate (18) ...
Page 19 - DC MOTOR AND GRIND CHAMBER - G1MD ONLY
19 SERVICE (Cont.) DC MOTOR AND GRIND CHAMBER - G1MD ONLY FIG. 6 DC MOTOR AND GRIND CHAMBER P1706 Location: The motor is located inside the upper part of the grinder housing. Test Procedures: 1. Remove the rear panel. Press the red “Reset” button visible on the rear of the motor. Listen care- fully ...
Page 21 - FIG. 8 MOTOR AND GRIND CHAMBER REMOVAL
21 SERVICE (Cont.) DC MOTOR AND GRIND CHAMBER - G1MD ONLY (cont.) FIG. 8 MOTOR AND GRIND CHAMBER REMOVAL P1711 5 7 6 16 18 1 19 17 9 8 11 10 3 4 2 1 7 13 12 14 15 22 21 20 23 11. Install burr (7) on burr auger rotor/spring assem- bly (6) securing with two .250”-20 screws (5). 12. Slide burr auger ro...
Page 23 - NOTE: Refer to Fig. 14 for the disassembly and assembly
23 SERVICE (Cont.) 1. Retaining Ring W/Hopper Gasket 2. Slide Plate, Solenoid Plunger and Spring 3. Spacer Plate 4. Mounting Ring, Solenoid and Solenoid Mounting Plate 5. Setscrew, #8-32 6. Motor and Burr Housing P1050 1 2 3 4 5 2 6 FIG. 11 SOLENOID AND GATES 8. Remove spacer plate (3) and set aside...
Page 24 - MODEL LPG ONLY
24 SERVICE (Cont.) 20. Remove the two #8-32 flat head screws securing the motor cover (18) to the motor and housing assembly (17) and remove the cover. Set aside for reassembly. 21. Discard old motor and housing assembly. 22. Place new motor on it’s side and install motor cover (18) using two #8-32 ...
Page 25 - OPTONAL EXTRA
25 SERVICE (Cont.) DECHAFFER (Models LPG & FPG) FIG. 13 DECHAFFER P1062 Location: The dechaffer spring plates are located in the burr housing cap. 1 FIG. 14 DECHAFFER REMOVAL/REPLACEMENT P1063 2 Removal and Replacement: Refer to Fig. 14 1. Remove coffee beans from hopper(s). 2. Lay grinder on it...
Page 26 - FRANKLIN MOTOR; GRN to Chasis Ground
26 SERVICE (Cont.) 2. The entire wiring harness must be fed into the bottom of the grinder housing through the hole in the motor mounting plate. 3. Remove both 6-32 screws beneath the upper front inspection panel. 4. Remove the six 10-32, hex head screws on top of the motor mounting plate. 5. Slowly...
Page 29 - CALIBRATION; Place empty funnel into funnel rails.
29 CALIBRATION 1. Place empty funnel into funnel rails. 2. Press and hold the right hidden (copyright) button until the “MACHINE TYPE” menu appears. (See level 2 programming) 3. Press the middle button under the screen until the “CALIBRATE SCALES?” menu appears. 4. Press the right button under “YES”...
Page 30 - BLK
30 P1745 FIG. 20 CAPACITOR Location: The capacitor is located inside the front panel of the hopper housing next to the Off/On/Start switch. Test Procedure: 1. Disconnect grinder from the power source. 2. Visually inspect the capacitor for leakage. If leakage is visible, replace the capacitor. 3. Con...
Page 34 - Wiring Diagrams and check the grinder wiring har-; BLK to Cordset
34 SERVICE (Cont.) Location: The Off/On/Start switch is located to the left side on the front of the housing above the upper front inspec- tion panel. Test Procedure: 1. Unplug the grinder. 2. Remove the black wire from the switch. 3. Check for continuity across the black wire from the Off/On/Start ...
Page 35 - TAN
35 SERVICE (Cont.) URN O F F S T A R T ON CARAFE P1300 Location: The Urn/Carafe switch is located to the left side on the front of the housing above the upper inspection panel. Test Procedure: 1. Disconnect the grinder from the power supply. 2. Remove the tan, yellow and green wires from the switch....
Page 37 - BRN to BRN WIRE
37 SMALL MEDIUM LARGE P2946 SERVICE (Cont.) FIG 34 POTENTIOMETERS Location: The potentiometer switches are located on the top rear of the hopper housing. Test Procedure: 1. Disconnect the grinder from the power source. 2. Open hopper lid and loosen four screws inside the hopper and remove hopper. 3....
Page 39 - Single set timer shown
39 SERVICE (Cont.) Location: The relay is located on the timer bracket in the grinder base. The bracket can be removed by loosening the two 8-32 screws beneath the timer dial. Test Procedure: 1. Disconnect the grinder from the power supply. 2. Check the voltage across the white/red and white/ green ...
Page 43 - D. Spring Retaining Washer; They must move freely.
43 SERVICE (Cont.) Location: The slide plates are located on the solenoid mount- ing plate immediately beneath the hopper openings. The slide plates must always remain flat for proper operation. Test Procedure: With the solenoid mounting plate attached to the hopper, push the solenoid plunger into t...
Page 44 - C. Slide Gate Support
44 SERVICE (Cont.) Location: The slide plates are located on the solenoid mount- ing plate immediately beneath the hopper openings. The slide plates must always remain flat for proper operation. Test Procedure: With the solenoid mounting plate attached to the hopper, push the solenoid plunger into t...
Page 45 - Diagram and check the grinder wiring harness.
45 SERVICE (Cont.) Left Right WHI/ORN to Timer P4-4 RED/BLK to Right SolenoidRED/BLK to Timer P4-7 WHI/YEL to Timer P4-5 RED/BLK to Left Solenoid P612 Location: The solenoids are located on the mounting plate immediately beneath the hoppers. Test Procedure: 1. Unplug the grinder. 2. Connect a voltme...
Page 48 - WHI/GRN to Relay Coil
48 SERVICE (Cont.) Location: The timer is located on the timer bracket in the grinder base. The bracket can be removed by loosening the two 8-32 screws beneath the timer dial(s). Test Procedure: 1. Disconnect the grinder from the power supply. 2. Check the voltage across terminals TL1 & TL2 with...
Page 52 - NO YES
52 SERVICE (Cont.) Membrane Switches (Model MHG only) Location: The membrane switch is located on the front of the hopper housing. Test Procedure: 1. Press and hold the right hidden button to enter programming. 2. Scroll through the menus to Service Tools and select YES. 3. Select YES at Test Output...
Page 53 - NOTE: Before continuing, check that the ribbon cable; To Control Board J6
53 PE RS ON AL IN JU RY HA ZA RD . KEE P F INGE RS AN D FORE IGN OB JE CT S OU T OF H OPPE R OR CH UTE OPEN ING. CAU TIO N SERVICE (Cont.) Membrane Switches (Models FPG-2 & G9-2 DBC) Location: The membrane switch is located on the front of the hopper housing. Test Procedures: NOTE: Before contin...
Page 54 - Across either pair
54 SERVICE (Cont.) EMI Filter (Models FPG & FPG-2) FIG 60 EMI FILTER FIG 61 EMI FILTER TERMINALS Location: The EMI Filter is located inside the rear cover of the grinder housing.Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the two red wires and two white wires...
Page 57 - To Control Board J8
57 Display Board (Model MHG) Location: The display board is located inside the hopper housing behind the membrane switch. Test Procedure: 1. Press and hold the upper right hidden button to enter the Programming menus. 2. Scroll to SERVICE TOOLS menu, and press the button under "YES". 3. Pres...
Page 58 - TRIAC MAP for MHG
58 TRIAC MAP for MHG MOV1 controls Transformer @ J5-4,5,6 TH1 & MOV2 controls Left Gate @ J5-3 TH2 & MOV3 controls Relay @ J5-2 TH3 & MOV4 controls Right Gate @ J5-1 41545 122209
Page 60 - SCHEMATIC WIRING DIAGRAM; WIRE
60 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 UNI...
Page 63 - SCHEMATIC WIRING DIAGRAM MHG
63 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 ...
Page 64 - WIRING DIAGRAMS; SCHEMATIC WIRING DIAGRAM
64 WIRING DIAGRAMS 1 5 10 16 J19 4 J6 1 J12 5 1 J1 5 1 9 8 STATIC SHIELD SWITCH UNIT ASSY RIGHT HOPPER COIL LEFT HOPPER COIL FUNNEL COIL T1 LOAD LINE VIO VIO ORG ORG YEL YEL K1 RIGHT GATE RELAY LEFT GATE RELAY LI N SOL SOL MTR LIMIT THERMOSTAT LIMIT THERMOSTAT K2 K3 RIGHT GATE LEFT GATE WHT K3 K2 K1...
Page 65 - SINGLE PHASE
65 27103.0000D 04/07 ©1996 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG-2E, LPGB-2E N L1 BLK RED WHI 100 VOLTS AC 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ GRN 3 AMP 23456 1 789 10 TIMER ASSY. (Hopper Slide Gate Timer Dial Wiring) Right - Brown Left - Orange YEL WHI BLU YEL WHI/BLK BLK RED VIO...
Page 69 - SINGLE PHASE 60 HZ
69 BLK WHI RED RED 10529.0003E 10/98 © 1998 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LPG W/Capacitor L1 P1 2 3 4 5 6 1 1 2 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN RED WHI/BLK BLK BLK WHI/BLU WHI/BRN WHI BLK BLK BLK RED WHI/BRN WHI/BRN WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC ...
Page 72 - SCHEMATIC WIRING DIAGRAM G9
72 10173-0000F 4/91 © 1987 BUNN-O-MATIC CORPORATION WHI/GRN BLK K1 WHI/BLU M L2 L1 120 VOLTS AC 2 WIRE SINGLE PHASE 60 HZ L1 N GREEN K1 N.O. SCHEMATIC WIRING DIAGRAM G9 TIMER WHI/RED WHI/YEL WHI/ORA WHI WHI WHI/RED WHI/RED OPTIONAL KEY SW 5 4 3 2 1 W H I / O R A ORA URN CARAFE WHI/GRN 1 BLK K1 WHI/B...
Page 73 - SCHEMATIC WIRING DIAGRAM G9A HD; SCHEMATIC WIRING DIAGRAM G9WD-RH
73 10187-0000C 02/08© 1987 BUNN-O-MATIC CORPORATION WHI/GRN BLK K1 WHI/BLU M L2 L1 230 VOLTS AC 2 WIRE + GND SINGLE PHASE 50 HZ L1 L2 GREEN K1 N.O. SCHEMATIC WIRING DIAGRAM G9A HD TIMER WHI/RED WHI/RED WHI/YEL WHI/ORA RED/BLK RED/BLK RED/BLK WHI/RED WHI/RED 5 4 3 2 1 OPTIONAL POWER INDICATOR LIGHT W...
Page 75 - SCHEMATICWIRINGDIAGRAMG9-2A HD
75 BLU VIO YEL GRY TAN ORA RED/BLK WHI WHI/GRN WHI/ORA WHI/YEL RED/BLK BLK WHI/RED WHI/BLU M L2 L1 WHI/BLU WHI/BLK YEL 230 VOLTS AC 2 WIRE SINGLE PHASE 50 HZ 10768.0000E 05/03 © 1993 BUNN-O-MATIC CORPORATION L1 L2 K1 N.O. SCHEMATICWIRINGDIAGRAMG9-2A HD OFF/ON/START SW HOPPER SELECTOR SW TAN 1 8 TIME...
Page 77 - NOT A PURCHASED SCHEMATIC
77 WIRING DIAGRAMS BLK WHI RED RED 36781.0000A 04/04 ©2004 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM FPG N L1 RED WHI/BLK BLK WHI/BLU WHI/BRN WHI RED WHI/BLK BLK WHI/BLU WHI/BRN WHI GRN BLK SM MED LG RED WHI/BRN WHI/BLU 1 2 3 4 5 P2 BLK RED WHI/BRN WHI/BLU DC MOTOR BLK WHI RED RED 4 1 2 3 P3...