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CONTENTS User Notices .............................................................3 Electrical Requirements ............................................3 Operating Controls....................................................3 Cleaning....................................................................4 Coffee Grinding.........................................................4 Initial Set-Up.............................................................5 Adjustments ................................
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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 electrical equipment should be performed only by qualified service personnel. • All electronic components have ac voltage and dc voltage potential on their terminals. Shorting of terminals or the applicati
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SERVICE (cont.) Capacitor (Model LPG)(cont.) 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 leak- SCHEMATIC WIRING DIAGRAM age is visible, replace the capacitor. LPG2E L1 N GRN SELECTOR BLK 3 SWITCH AMP WHI GRN 3. Connect the grinder to the power source, if the 1 WHI 2 TIMER ASSY. 3 (Hopper Slide BLU BLK GRINDER 4 YEL WH
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SERVICE (cont.) 1 Motor (cont.) 9. Slide spacer plate (4) off of burr housing divider 2 (8) and set aside for reassembly. 10. Loosen the #10-32 setscrew (5) securing the 3 mounting ring and solenoid bracket (6) to the burr housing. 11. Lift mounting ring, solenoid bracket and solenoids 4 (6) over the motor and burr housing assembly (9) and set aside for reassembly. 12. Remove the #8-32 setscrew (7) and set aside for 6 reassembly. 3 13. Lay motor on it’s side. NOTE: Refer to Fig. 14 for the disas
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SERVICE (cont.) Motor (cont.) 13 MODEL LPG ONLY 10 11 12 13 14 15 16 17 18 P1051 FIG. 14 ROTOR/AUGER, BURRS AND MOTOR COVER 22. Remove the two #8-32 flat head screws securing 32. Install solenoids, solenoid bracket and mounting the motor cover (18) to the motor and housing ring (6) as an assembly on the new motor with the assembly (17) and remove the cover. Set aside for reassembly. solenoids located to the opposite side of th
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SERVICE (cont.) 1. Remove all wires from the switch terminals. 2. Compress the clips inside the front of the hopper OFF/ON/START Switch housing and gently push the switch through the opening. 3. Push the new switch into the opening and spread the clips to retain the switch in the hopper housing. 4. Reconnect all the wires to the switch terminals. 5. Refer to Fig. 16 when reconnecting the wires. YEL to Timer P1-5 - LPG-2E RED from Motor WHI/BRN to Timer P1-5 - LPG WHI from Power Cord to Hopper RE
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SERVICE (cont.) 7. Place the hopper selector switch in the right posi- Timer (Model LPG-2E) tion. 8. Insert the leads of a voltmeter set to read at least 120 volts AC, along side the red wire (terminal 8) and the violet wire (terminal 9) of the harness plug. Place the Off/On/Start switch in the “START” lower position. Connect the grinder to the power source. The indication must be 120 volts AC for the set gate time and return to 0 volts. 9. Disconnect the grinder from the power source. If voltag
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SERVICE (cont.) Timer (Model LPG-2E) 3. Disconnect the grinder from the power source. 8. Slip timer and timer mounting bracket under the two screws on the motor support plate and tighten If voltage is present as described, proceed to step #4. screws. 9. Locate the left and right timer dials in their proper If voltage is not present as described, refer to the wir- place on the rear panel and secure with nuts and ing diagram and check the grinder wiring harness. internal tooth lockwashers. 10. Pla
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WIRING SCHEMATICS SCHEMATIC WIRING DIAGRAM LPG2E L1 N GRN SELECTOR BLK SWITCH 3 WHI AMP GRN 1 WHI 2 3 TIMER ASSY. BLU BLK (Hopper Slide GRINDER 4 YEL WHI Gate Timer 5 Dial Wiring) WHI/BLK RED M 6 Right - Brown BLK RED 7 Left - Orange RED RED 8 VIO 9 RT RED ORA 10 SOL OFF/ON/START SLIDE GATES SWITCH RED LT RED SOL RED RED YEL WHI 120 VOLTS AC 27103.0000C 11/98 © 1996 BUNN-O-MATIC CORPORATION 2 WIRE SINGLE PHASE 60 HZ 27091 111598 18
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SCHEMATIC WIRING DIAGRAM LPG & LPG2 L1 N GREEN B W L H K BLK 3 I AMP P1 RED RED 1 WHI/BLK WHI/BLK 2 BLK BLK 3 WHI/BLU WHI/BLU TIMER 4 WHI/BRN WHI/BRN 5 WHI WHI 6 GRN P2 BLK BLK 1 RED RED 2 WHI/BRN WHI/BRN 3 WHI/BLU WHI/BLU 4 5 P3 BLK BLK 1 DC WHI WHI 2 MOTOR RED RED 3 RED RED 4 10529.0000C 3/92 © 1990 120 VOLTS AC BUNN-O-MATIC CORPORATION 2 WIRE SINGLE PHASE 60 HZ 27091 111598 19
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WIRING SCHEMATICS SCHEMATIC WIRING DIAGRAM LPG-A L1 L2 GRN/YEL B R L E K BLK 3 D AMP P1 RED RED 1 WHI/BLK WHI/BLK 2 BLK BLK 3 WHI/BLU WHI/BLU TIMER 4 WHI/BRN WHI/BRN 5 WHI WHI 6 GRN P2 BLK BLK 1 RED RED 2 WHI/BRN WHI/BRN 3 WHI/BLU WHI/BLU 4 5 P3 BLK BLK 1 DC WHI WHI 2 MOTOR RED RED 3 RED RED 4 10529.0002E 8/01 © 1990 230 VOLTS AC BUNN-O-MATIC CORPORATION 2 WIRE SINGLE PHASE 50/60 HZ 27091 082701 20
