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  5. Operating & Service Manual

Bunn FMD-1 Operating & Service Manual

Summary of FMD-1

  • Page 1

    Bunn ® operating & service manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 28364.0001 5/00 ©1998 bunn-o-matic corporation fmd-1 (prior to s/n fmd0013000) re le as e b ut to n w he n c up is 2/3 fu ll plac e cu p h ere pu...

  • Page 2

    2 introduction this equipment dispenses hot beverages on demand from powered product. It is for indoor use only on a sturdy counter or shelf. Warranty bunn-o-matic corp. (“bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at th...

  • Page 3

    3 00656.0000 00831.0000 28368.0000 push and hold button until cup is 2/3 full, then release 28301.0001 user notices (cont.) 28364 041598.

  • Page 4

    4 initial set-up 1. Locate the drip tray assembly beneath the dispenser nested in the packing material. 2. Remove the drip tray and the drip tray cover and set them aside. 3. Remove the water strainer assembly from the drip tray and set it aside. 4. Remove the four legs from the drip tray, apply non...

  • Page 5

    5 plumbing hook-up 1. Securely attach the short piece of tubing on the water strainer assembly to the inlet fitting on the bottom of the dispenser. 2. Flush the water line and securely attach it to the flare fitting on the water strainer assembly. 3. Turn-on the water supply. Initial fill & heat cau...

  • Page 6

    6 draining the hot water tank caution - the dispenser must be disconnected from the power source throughout these steps. 1. Disconnect the dispenser from the power source. 2. Open front door and place tank heater switch in the “off” (upper) position. 3. Shut-off and disconnect the incoming water sup...

  • Page 7

    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 elect...

  • Page 8

    8 product will not dispense (cont.) water is not hot 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. Exces...

  • Page 9

    9 water is not hot (cont.) spitting or excessive steaming dripping from dispense tip water flows into tank continuously 4. Tank heater switch 1. Lime build-up caution - tank and tank compo- nents should be delimed regularly depending on local water conditions. Excessive mineral build-up on stain- le...

  • Page 10

    10 product overflows container weak product 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 refer to service - dispense switch for testing procedures. See page ...

  • Page 11

    11 dispenser is making unusual noises excess dust display not lit 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 plumbing lines should not be rest- ing on the counter top. (a) the dispenser must be connected to a cold...

  • Page 12

    12 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 ...

  • Page 13

    13 service auger drive components (cont.) 5. 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 au...

  • Page 14

    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. 3. Remove the four #8-32 screws, loca...

  • Page 15

    15 5. Disconnect the dispenser from the power source. If voltage is present as described the control thermo- stat is operating properly. Reinstall bulb into the tank. If voltage is not present as described, replace the thermostat. Removal and replacement. 1. Disconnect the wires from the thermostat....

  • Page 16

    16 service (cont.) dispense switch location: the dispense switch is located on the lower outside center of the dispenser door. Test procedure: 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 interco...

  • Page 17

    17 service (cont.) fan fig. 10 fan location: the fan is located inside the dispenser hous- ing on the right rear of the dispenser base plate. Test procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the black and white wires from the fan terminals. 3. Check the voltage acros...

  • Page 18

    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: 1. Disco...

  • Page 19

    19 service (cont.) frother and whipper motor (cont.) 4. Disconnect vacuum hose (16) from fan baffle (17). 5. Remove the steam collector (1) by pulling it for- ward and at the same time twisting it clockwise. 6. Pull the mixing chamber (2) out of the whipper chamber (4). 7. Remove dispense tip (3) an...

  • Page 20

    20 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. Disconnect the eight pin plug on the ...

  • Page 21

    21 service (cont.) lamp holder fig. 15 lamp holders p1508 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. Remove upper door panel (4) and disconnect the door wiring harness from the...

  • Page 22

    22 level control board and level probe fig. 16 level control board and probe location: the level control board is located behind the lower access panel mounted on the right side of the component bracket. The level probe is located on the left center of the tank lid just in front of the overflow tube...

  • Page 23

    23 service (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. Carefully connect a piece of insulated jumper wire to terminal 4. Keep the o...

  • Page 24

    24 test procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect both black wires from the limit ther- mostat. 3. Check for continuity across the limit thermostat terminals. If continuity is present as described, the limit thermo- stat is operating properly. If continuity is not ...

  • Page 25

    25 service (cont.) removal and replacement: 1. Disconnect the red leads from the overflow pro- tection switch from the black wire from the main harness and the blue wire from the liquid level board. 2. Remove the nut beneath the copper overflow cup. 3. Remove the entire switch assembly from the cup....

  • Page 26

    26 solenoid valve (dispense) fig. 24 dispense solenoid valve location: the dispense solenoid is located on the upper left center of the tank. Test procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the white and white/red wires from the solenoid valve. With the “run/rinse” ...

  • Page 27

    27 for two wire 120 volt models, three wire 120/208 and 120/240 volt models. 4. Disconnect the dispenser from the power source, if voltage is present as described, proceed to #5 if voltage is not present as described, refer to the wiring diagram and check dispenser wiring har- ness. 5. Check for con...

  • Page 28

    28 tank heater fig. 28 tank heater location: the tank heater is located inside the tank and secured to the tank lid. Test procedure: 1. Disconnect the dispenser from the power source. 2. Check the voltage across the black and white wires 120 volt models or black and red wires for 120/208 volt models...

  • Page 29

    29 service (cont.) 14. Refer to fig. 29 when reconnecting the wires to the tank heater. Tank heater (cont.) fig. 29 tank heater terminals p1218 fig. 30 tank heater switch tank heater switch p1505 location: the tank heater switch located inside the dis- penser on the upper right of the front panel. T...

  • Page 30

    30 red/whi fluorescent lamp ballast sol dispense m whipper m hopper run/rinse switch whi whi whi red whi/red whi whi/red sol left dispense m right whipper m right hopper sol right dispense m left whipper m left hopper m center hopper m center whipper sol center dispense whi whi/vio whi/vio whi/vio w...