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: user guide
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See also: Service & Repair Manual
FMD-1
FMD-2
S/N FMD0013000-UP
OPERATING & SERVICE MANUAL
BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: (217) 529-6601 FAX: (217) 529-6644
To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE,
and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper
copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
www.bunnomatic.com
29112.0000D 09/07 ©1998 Bunn-O-Matic Corporation

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  • Page 1 To obtain the Illustrated Parts Catalog, visit the Bunn-O-Matic website, at www.bunn.com. This is absolutely FREE, and the quickest way to obtain the catalog. Contact Bunn-O-Matic Corporation at 1-800-286-6070 to obtain a paper copy of the required Illustrated Parts Catalog mailed via U.S. Postal Service.
  • Page 2 SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, 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

    Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., comply with the applicable Plumbing /SanitationCode. 00656.0000 FMD-1 28328.0004 28964.0000 27096.0000 FMD-1 ONLY 28368.0001 37881.0000 FMD-2 28328.0005 28964.0001 29112 091307...

  • Page 4: Initial Setup

    INITIAL SET-UP Locate the drip tray assembly beneath the dispenser nested in the packing material. Remove the drip tray and the drip tray cover and set them aside. Remove the water strainer assembly from the drip tray and set it aside. Remove the four legs from the packaging material, apply non-skid pads to the bottom of the legs and se- curely install the legs in the dispenser base.

  • Page 5: Plumbing Requirements

    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 of device may restrict water flow.

  • Page 6: Dispenser Use

    Refer to the decal on the rear of the dispenser door for cleaning recommendations and proccedures. 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. full and allow the mixing chamber to drain. 29112 091307...

  • Page 7: Draining The Hot Water Tank

    5. Reinstall plug(s) and hopper(s). HOPPER MOTOR SPEED ADJUSTMENT (FMD-1) The hopper dispense rate is preset at the factory. With 8 tooth gear and auger wire the preset dispense rate is approximately 3 to 5 grams per second. With 12 tooth gear and auger wire the preset dispense rate is approxi- mately 5 to 7 grams per second.

  • Page 8: Troubleshooting

    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 person- nel.
  • Page 9 5. Solenoid Valve (Inlet) 6. A) Level Control Board and Probe - FMD-1 B) Control Board and Probe - FMD-2 7. A) Auger Drive - FMD-1 B) Auger Drive - FMD-2 8. Water Strainer 9. Lime build-up CAUTION - Tank and tank compo-...
  • Page 10 2. Dispense Solenoid Valve 1. A) Level Control Board and Probe - FMD-1 B) Control Board and Probe - FMD-2 2. Solenoid Valve (Inlet) REMEDY Refer to Service - Tank Heater Switch for testing procedures.
  • Page 11 2. Dispense Solenoid Valve 1. Water Temperature 2. Whipper Motor 3. Frother 4. Dispense Solenoid Valve 5. Auger Drive - FMD-1 Auger Drive - FMD-2 6. Auger Spring - FMD-1 Auger Spring - FMD-2 7. Auger Motor - FMD-1 Auger Motor - FMD-2 8.
  • Page 12 Display not lit PROBABLE CAUSE 1. Plumbing Lines 2. Water Supply 3. Tank Heater 1. Fan 2. A) Hopper Drive Board - FMD-1 B) Control board - FMD-2 1. Lamp 2. Lamp Holder 3. Starter - Lamp 4. Ballast REMEDY Plumbing lines should not be resting on the counter top.

  • Page 13: Table Of Contents

    Increase/Decrease Switch (FMD-2) ... 28 Lamp Holder ... 29 Lamp ... 29 Lamp Starter and Socket ... 30 Level Control Board and Level Probe (FMD-1) ... 30 Limit Thermostat ... 32 Rinse/Run Switch (FMD-1) ... 32 Rinse/Run Switch (FMD-2) ... 33 Solenoid (Cold Water - Optional FMD-2 Only)...

  • Page 14: Auger Drive Components (Fmd-1)

    SERVICE AUGER DRIVE COMPONENTS - FMD-1 (CONT.) 5. Check the voltage across the positive (red wire) terminal and the negative (black wire) terminal on the auger motor with a voltmeter. With the rinse/ run switch in the run (lower) position press and hold the dispense switch.

  • Page 15: Auger Drive Components (Fmd-2)

    SERVICE (cont.) AUGER DRIVE COMPONENTS - FMD-1 (cont.) Auger Drive Motor (Refer to Fig. 2) 1. Remove hopper assy (17), and set aside for reas- sembly. 2. Remove the four #8-32 screws securing the hopper support plate (12), remove plate and set aside for reassembly.
  • Page 16 SERVICE (cont.) AUGER DRIVE COMPONENTS - FMD-2 (CONT.) 4. Disconnect the dispenser from the power sup- ply. If voltage is present as described and the auger does not turn, replace the auger motor. If voltage is not present as described, refer to the wiring diagrams and check the dispenser wiring har- ness.
  • Page 17 SERVICE (cont.) AUGER DRIVE COMPONENTS - FMD-2 (cont.) Removal, Cleaning and Replacement Hopper & Auger (Late Models)(Refer to Fig. 6) Open the dispenser door and raise the top front cover. Lift the front edge of hopper assy (20) over the tab on hopper support plate (19) and slide hopper assembly out the front of the dispenser.
  • Page 18 Control Board J3-2 BLK to GRN from Control Board J3-4 RED to WHI/RED from Control Board J3-3 FIG. 7 AUGER MOTOR TERMINALS BALLAST - FMD-1 & FMD-2 FMD-1 FMD-2 FIG. 8 BALLAST RIGHT BLK to GRN from Control Board J3-4...

  • Page 19: Control Thermostat

    SERVICE (cont.) BALLAST - FMD-1 & FMD-2 (cont.) Location FMD-1 The front door lamp ballast is located behind the front access panel on the left front side of the component bracket. FMD-2 The front door lamp ballast is located behind the front access panel on the left rear side of the component bracket.

  • Page 20: Control Board (Fmd-2)

    SERVICE (cont.) CONTROL THERMOSTAT - FMD-1 & FMD-2 (cont.) b) 208 volts ac for three wire 120/208 volt models. c) 240 volts ac for three wire 120/240 volt models. d) 230 volts ac for two wire 230 volt models. 5. Disconnect the dispenser from the power source.
  • Page 21 SERVICE (cont.) 6. Disconnect the four pin connector from J4 of the control board. 7. Check the voltage across pins 1 & 4 of the four pin connector on the wiring harness with a voltmeter. Connect the dispenser to the power source. The indication must be: a) 120 volts ac for two wire 120 volt models.

  • Page 22: Dispense Switch

    5. Reconnect the three plugs on the main harness to the connectors on the control board. J2 J3 FIG. 13 CONTROL BOARD CONNECTORS DISPENSE SWITCH(S) - FMD-1 & FMD-2 Location: the lower outside of the dispenser door. P1640 Test Procedure: FMD-1 FIG.14 DISPENSE SWITCH...
  • Page 23 SERVICE (cont.) DISPENSE SWITCH(S) - FMD-1 & FMD-2 (cont.) FMD-1 1. Disconnect the dispenser from the power source. 2. Open the dispenser door and remove the bottom door cover. 3. Disconnect the wires from the door interconnect wiring harness to the dispense switch.

  • Page 24: Fan

    SERVICE (cont.) DISPENSE SWITCH(S) - FMD-1 & FMD-2 (cont.) FMD-1 RED/WHI LEFT FMD-2 BLU/WHI FIG. 15 DISPENSE SWITCH TERMINALS FAN - FMD-1 & FMD-2 FIG. 16 FAN Location: on the right rear of the dispenser base plate. Test Procedures: 1. Disconnect the dispenser from the power source.

  • Page 25: Frother

    Test Procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the red and white wires (FMD-1 & FMD-2 left motor) or orange and white wires (FMD-2 right motor) of the main harness from the black leads of the motor.
  • Page 26 SERVICE (cont.) FROTHER AND WHIPPER MOTOR - FMD-1 (shown) & FMD-2 (cont.) 5. Remove the steam collector (1) by pulling it forward and at the same time twisting it clockwise. 6. Pull the mixing chamber (2) out of the whipper chamber (4).

  • Page 27: Hopper Drive Board(Fmd-1)

    SERVICE (cont.) HOPPER DRIVE BOARD - FMD-1 ONLY FIG. 21 HOPPER DRIVE BOARD Location The hopper drive board is located inside the dispenser mounted on the auger motor mounting bracket. Test Procedures: 1. Disconnect the dispenser from the power source.

  • Page 28: Increase/Decrease Switch (Fmd-2)

    SERVICE (cont.) HOPPER DRIVE BOARD - FMD-1 ONLY (cont.) RED from Hopper Motor RED/WHI from Main Harness WHI from Main Harness FIG. 22 HOPPER DRIVE BOARD TERMINALS INCREASE/DECREASE SWITCH - FMD-2 ONLY FIG. 23 INCREASE/DECREASE SWITCH Location: The increase/decrease switch is located on the lower left front of the whipper motor mounting panel.

  • Page 29: Lamp Holder

    SERVICE (cont.) LAMP HOLDER - FMD-1 (shown) & FMD-2 FIG. 25 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.

  • Page 30: Lamp Starter And Socket

    10. Install door lower panel (5) with starter and starter socket on door assy (1) using four #8-32 screws. LEVEL CONTROL BOARD AND LEVEL PROBE - FMD-1 ONLY FIG. 26 LEVEL CONTROL BOARD AND PROBE Location: The level control board is located behind the lower access panel mounted on the right side of the compo- nent bracket.
  • Page 31 SERVICE (cont.) LEVEL CONTROL BOARD AND LEVEL PROBE - FMD-1 ONLY (cont.) Test Procedure: 1. Disconnect the dispenser from the power source. 2. Remove the violet wire from terminal 1 & pink wire from terminal 4 of the circuit board.

  • Page 32: Limit Thermostat

    SERVICE (cont.) LIMIT THERMOSTAT - FMD-1 (shown) & FMD-2 FIG. 28 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.

  • Page 33: Rinse/Run Switch (Fmd-2)

    SERVICE (cont.) RINSE/RUN SWITCH - FMD-1 (CONT.) Removal and Replacement: Open the dispenser door. Remove the facenut securing the run/rinse switch to the dispenser front panel. Remove switch with wires attached from the back side of the front panel. Disconnect the wires from the switch and discard the switch.
  • Page 34 SERVICE (cont.) SOLENOID VALVE (COLD WATER OPTIONAL)(FMD-2 ONLY) FIG. 34 COLD WATER SOLENOID VALVE Location: The cold water solenoid valve is located on the left side of the dispenser base just behind the compo- nent bracket. Test Procedures: Disconnect the dispenser from the power source.
  • Page 35 Test Procedures: Disconnect the dispenser from the power source. For FMD-1 disconnect the red and white wires from the solenoid valve. For FMD-2 disconnect orange and white wires on the right solenoid or the tan and white wires on the left solenoid.
  • Page 36 SERVICE (cont.) SOLENOID VALVE (DISPENSE) - FMD-1 & FMD-2 (cont.) 3. Remove the two #8-32 securing the auger motor mounting panel to the dispenser housing and the two rear #8-32 screws from the side panels. 4. Tilt auger motor mounting panel forward allowing access to the dispense valve(s).

  • Page 37: Solenoid (Cold Water - Optional Fmd-2 Only)

    SERVICE (cont.) SOLENOID VALVE (INLET) - FMD-1 & FMD-2 (cont.) 7. Disconnect the dispenser from the power source. If the sound is heard as described and water will not pass through the solenoid valve, there may be a block- age in the water line before the solenoid valve or, the solenoid valve may require inspection for wear, and removal of waterborne particles.
  • Page 38 SERVICE (cont.) TANk HEATER - FMD-1 (shown) & FMD-2 (cont.) NOTE - If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath. Removal and Replacement: 1. Disconnect the dispenser from the power source.
  • Page 39 SERVICE (cont.) BLK to Main Harnesss BLK from Main Harness FIG. 43 TANK HEATER SWITCH TERMINALS TRANSFORMER - FMD-2 ONLY FIG. 44 TRANSFORMER Location: The transformer is located behind the lower front access cover, mounted on the right rear side of the component bracket.

  • Page 40: Tank Heater

    WHIPPER FLUORESCENT LAMP BALLAST CHASSIS DOOR 120 VOLTS A C - 2 WIRE 120/208-240 VOLTS AC - 3WIRE SINGLE PHASE 29096.0000C 8/98 © 1998 BUNN-O-MATIC CORPORATION CONTROL LIMIT THERMOSTAT TANK HEATER BLK-16 BLK-16 HOPPER SPEED ADJUST WHI/RED 1 2 3...
  • Page 41 SWITCH DISPENSE WHIPPER FLUORESCENT LAMP BALLAST CHASSIS DOOR 230 VOLTS AC CE 2 WIRE + GND SINGLE PHASE 50/60 HZ 29096.0006B 04/05 © 2005 BUNN-O-MATIC CORPORATION THERMAL CONTROL LIMIT THERMOSTAT BLK-16 BLK-16 HOPPER SPEED ADJUST WHI/RED 1 2 3 HOPPER...

  • Page 42: Tank Heater Switch

    RIGHT HOPPER LEFT HOPPER JUMPER PLUG MUST BE USED WHEN COLD DRINK FEATURE NOT INSTALLED 120 VOLTS AC - 2 WIRE 120/208-240 VOLTS AC - 3 WIRE SINGLE PHASE, 60 HZ 29096.0001C 10/98 © 1998 BUNN-O-MATIC CORPORATION STARTER 29112 091307...
  • Page 43 LEFT HOPPER WHI/RED COLD DRINK OPTION (LEFT ONLY) CHASSIS 230 VOLTS AC 2 WIRE + GND SINGLE PHASE, 50 HZ DOOR 29096.0005B 04/05 © 2005 BUNN-O-MATIC CORPORATION STARTER THERMAL FUSE WHI-16 TANK INLET JUMPER PLUG MUST BE USED WHEN COLD...

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Fmd-2

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