Bunn FMD-1 Operating & Service Manual
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Bunn FMD-1 Operating & Service Manual

Bunn FMD-1 Operating & Service Manual

Bunn fmd-1: service manual
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See also: Service & Repair Manual , Operation & Service Manual
BUNN
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
28364.0001 5/00 ©1998 Bunn-O-Matic Corporation
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
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  • Page 1 BUNN OPERATING & SERVICE MANUAL BUNN-O-MATIC CORPORATION PHONE: (217) 529-6601 FAX: (217) 529-6644 28364.0001 5/00 ©1998 Bunn-O-Matic Corporation ® POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 FMD-1 (prior to S/N FMD0013000) T I L...

  • Page 2: Warranty

    SPECIFIED HEREIN, TO REPAIR OR, AT BUNN’S SOLE OPTION, REPLACEMENT OR REFUND. In no event shall Bunn be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.
  • Page 3 USER NOTICES (Cont.) 00656.0000 00831.0000 28368.0000 PUSH and HOLD BUTTON UNTIL CUP IS 2/3 FULL, THEN RELEASE 28301.0001 28364 041598...

  • Page 4: Initial Setup

    It can be purchased direct from Bunn-O-Matic (part number 00326-0000). Bunn-O-Matic does not recommend the use of a saddle valve to install the brewer. The size and shape of the hole made in the supply line by this type...

  • Page 5: Plumbing Hook-Up

    Refer to the decal inside the hopper access door for cleaning recommendations and procedures. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment. ADJUSTMENTS The beverage solenoid is preset to dispense approximately one ounce per second. This amount can be adjusted: Disconnect the dispenser from the power source.

  • Page 6: Draining The Hot Water Tank

    Insert a tube to the bottom of the tank and syphon ALL of the water out. (Bunn-O-Matic has a syphon assembly #12440.0000 available for this purpose.) NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power source.

  • Page 7: 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.
  • Page 8 TROUBLESHOOTING (cont.) PROBLEM Product will not dispense (cont.) Water is not hot PROBABLE CAUSE 5. Solenoid valve (inlet) 6. Level control board and probe 7. Overflow protection switch 8. Auger drive 9. Water strainer 10. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions.
  • Page 9 TROUBLESHOOTING (cont.) PROBLEM Water is not hot (Cont.) Spitting or excessive steaming Dripping from dispense tip Water flows into tank continuously PROBABLE CAUSE 4. Tank heater switch 1. Lime build-up CAUTION - Tank and tank compo- nents should be delimed regularly depending on local water conditions.
  • Page 10 TROUBLESHOOTING (cont.) PROBLEM Product overflows container Weak product PROBABLE CAUSE 1. Dispense switch 2. Dispense solenoid valve 1. Water temperature 2. Whipper motor 3. Frother 4. Dispense solenoid valve 5. Auger drive 6. Auger spring 7. Auger motor 8. Rinse/Run switch REMEDY Refer to Service - Dispense Switch for testing procedures.
  • Page 11 TROUBLESHOOTING (CONT.) PROBLEM Dispenser is making unusual noises Excess dust Display not lit PROBABLE CAUSE 1. Plumbing Lines 2. Water Supply 3. Tank Heater 1. Fan 2. Hopper Delay Board 1. Lamp 2. Lamp Holder 3. Starter - Lamp 4. Ballast REMEDY Plumbing lines should not be rest- ing on the counter top.

  • Page 12: Auger Drive Components

    SERVICE This section provides procedures for testing and replacing various major components used in this dispenser 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.
  • Page 13 SERVICE AUGER DRIVE COMPONENTS (CONT.) With the wires removed from the motor . Check for continuity across the two terminals on the bottom of the auger motor. If continuity is present as described, refer to Fig.3 and reconnect the wires to the terminals on the bottom of the auger motor, the auger motor is operating prop- erly.
  • Page 14 SERVICE (cont.) AUGER DRIVE COMPONENTS (cont.) Auger Drive Motor (Refer to Fig. 2) 1. Remove hopper assy (18), and set aside for reas- sembly. 2. Remove the four #8-32 screws securing the hop- per support plate (13), remove plate and set aside for reassembly.

  • Page 15: Control Thermostat

    SERVICE (cont.) BALLAST (cont.) BLK to Main Wiring Harness BLK to BLU from Door Interconnect Harness FIG. 5 BALLAST TERMINALS CONTROL THERMOSTAT FIG. 6 CONTROL THERMOSTAT Location The thermostat is located inside the dispenser on the upper left rear side of the housing. Test Procedure 1.

  • Page 16: Dispense Switch

    SERVICE (cont.) DISPENSE SWITCH FIG.8 DISPENSE SWITCH Location: The dispense switch is located on the lower outside center of the dispenser door. Test Procedure: Disconnect the dispenser from the power source. Open the dispenser door and remove the bottom door cover. Disconnect the wires from the door interconnect wiring harness to the dispense switch.
  • Page 17 SERVICE (cont.) FIG. 10 FAN Location: The fan is located inside the dispenser hous- ing on the right rear of the dispenser base plate. Test Procedures: Disconnect the dispenser from the power source. Disconnect the black and white wires from the fan terminals.
  • Page 18 SERVICE (cont.) FROTHER AND WHIPPER MOTOR FIG. 12 FROTHER AND WHIPPER MOTOR Location: The frother is located behind the dispenser door, mounted on the front panel inside the whipper chamber. The whipper motor is located on the back side of the whipper motor mounting panel Test Procedure: Disconnect the dispenser from the power source.
  • Page 19 SERVICE (cont.) FROTHER AND WHIPPER MOTOR (cont.) Disconnect vacuum hose (16) from fan baffle (17). Remove the steam collector (1) by pulling it for- ward and at the same time twisting it clockwise. Pull the mixing chamber (2) out of the whipper chamber (4).

  • Page 20: Hopper Delay Board

    SERVICE (cont.) HOPPER DELAY BOARD FIG. 14 HOPPER DELAY BOARD Location The hopper delay board is located behind the lower front access panel mounted in the center of the component bracket. Test Procedures: 1. Disconnect the dispenser from the power source. 2.

  • Page 21: Lamp Holder

    SERVICE (cont.) LAMP HOLDER FIG. 15 LAMP HOLDERS Door Assy Upper Panel Lamp Holders Lower Panel Lamp Starter W/Socket Location: The lamp holders are located on the front of the upper panel behind the display panel. Test Procedure: 1. Disconnect the dispenser from the power source. 2.

  • Page 22: Level Control Board And Level Probe

    SERVICE (cont.) LAMP STARTER and SOCKET (Refer to Fig. 15) Location: The lamp starter (6) is located inside the door assy (1) on the top of the door lower panel (5). Test Procedures: 1. Disconnect the dispenser from the power source. 2.
  • Page 23 SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE (cont.) If voltage is present as described, proceed to #5. If voltage is not present as described, refer to the wiring diagram and check the dispenser wiring haness. 5. Reconnect the violet wire to terminal 1. 6.

  • Page 24: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT FIG. 18 LIMIT THERMOSTAT Location: The limit thermostat is located in the center of the tank lid. Test Procedures: Disconnect the dispenser from the power source. Disconnect both black wires from the limit ther- mostat. Check for continuity across the limit thermostat terminals.
  • Page 25 SERVICE (cont.) OVERFLOW PROTECTION SWITCH (cont.) wire from the main harness and blue wire from the liquid level board. 3. Check for continuity across the safety overflow switch red wires only until the plastic float is raised and check that continuity returns when the plastic float is again lowered.
  • Page 26 2. Turn-off the water supply to the dispenser. 3. Drain enough water from the tank so the water level is below the dispense valve mounting hole. NOTE: Bunn-O-Matic has a syphon assembly, #12440.0000. available for this purpose. 4. Disconnect the water line from the solenoid valve.
  • Page 27 SERVICE (cont.) SOLENOID VALVE (DISPENSE) 6. Using the #10-32 screw install new solenoid valve on side of the tank 7. Push the water line onto the tube on bottom of solenoid valve. 8. Refer to Fig. 25 when reconnecting the wires. WHI/RED to Auger Motor WHI to Main Harness FIG.

  • Page 28: Tank Heater

    SERVICE (cont.) SOLENOID VALVE (INLET) WHI from Main Harness VIO from Liquid Level Board FIG. 27 INLET SOLENOID VALVE TERMINALS TANK HEATER FIG. 28 TANK HEATER Location: The tank heater is located inside the tank and secured to the tank lid. Test Procedure: 1.

  • Page 29: Tank Heater Switch

    SERVICE (cont.) TANK HEATER (cont.) 14. Refer to Fig. 29 when reconnecting the wires to the tank heater. WHI or RED to Main Harness FIG. 29 TANK HEATER TERMINALS TANK HEATER SWITCH FIG. 30 TANK HEATER SWITCH Location: The tank heater switch located inside the dis- penser on the upper right of the front panel.

  • Page 30: Schematic Wiring Diagram

    ASSY. WHI/VIO RUN/RINSE SWITCH WHI/VIO CHASSIS 120 VOLTS A C - 2 WIRE OR 120/208-240 VOLTS AC - 3WIRE SINGLE PHASE, 60 HZ 28341.0000G 7/98 © 1997 BUNN-O-MATIC CORPORATION SCHEMATIC WIRING DIAGRAM LIMIT THERMOSTAT TANK HEATER BLK-16 BLK-16 BLK-16 BLK-16...

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