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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 29112.0000 5/00 ©1998 bunn-o-matic corporation fmd-1 fmd-2 s/n fmd0013000-up relea se but ton w hen cup is 2/3 fu ll place cup her e pu sh an d h...

  • Page 2

    2 introduction this equipment dispenses hot beverages or soups 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 exist...

  • Page 3

    3 00656.0000 00831.0000 28368.0001 27096.0000 fmd-1 only push and hold button until cup is 2/3 full, then release 28964.0000 push and hold button until cup is 2/3 full, then release 28964.0001 user notices (cont.) 29112 101598.

  • 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 packaging material, ...

  • Page 5

    5 initial fill & heat caution - the dispenser must be disconnected from the power source throughout the initial set-up, except when specified in the instructions. 1. Turn-on the water supply and connect the dispenser to the power source. 2. Water will automatically flow into the tank to the proper l...

  • Page 6

    6 cold beverage set-up (optional fmd-2 only) cold beverages may be dispensed from the left dispense position as follows: 1. Disconnect the dispenser from the power source. 2. Remove the lower front access panel. 3. Locate the hot/cold jumper connection near the whipper panel in the main wiring harne...

  • Page 7

    7 4. Return the rinse/run switch to the run position after hopper motor speed adjustments are complete. 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 pla...

  • Page 8

    8 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 9

    9 troubleshooting (cont.) problem product will not dispense (cont.) water is not hot probable cause 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 - ...

  • Page 10

    10 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 con...

  • Page 11

    11 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 - fmd-1 auger drive - fmd-2 6. Auger spring - fmd-1 auger spring - fmd-2...

  • Page 12

    12 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. A) hopper drive board - fmd-1 b) control board - fmd-2 1. Lamp 2. Lamp holder 3. Starter - lamp 4. Ballast remedy plumbing lines...

  • Page 13

    13 service this section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Re- fer to troubleshooting for assistance in determin- ing the cause of any problem. Warning - inspection, testing, and repair of electri- cal equipm...

  • Page 14

    14 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. Connect the dispenser ...

  • Page 15

    15 12 11 9 8 7 j4 j1 j2 j3 j1 service (cont.) red to hopper speed control board (+) blk to hopper speed control board (-) p1639 fig. 3 auger motor terminals fig. 4 auger drive components location the auger components are located inside the bottom part of the hopper except for the auger drive bracket...

  • Page 16

    16 service (cont.) auger drive components - fmd-2 (cont.) 4. Disconnect the dispenser from the power supply. 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 wir- ing diagrams and check the dispenser wiring ...

  • Page 17

    17 ballast - fmd-1 & fmd-2 p1666 fig. 7 ballast service (cont.) auger drive components - fmd-2 (cont.) auger drive motor (refer to fig. 5) 1. Remove all hopper assemblies (20) and set aside for reassembly. 2. Remove the four #8-32 screws securing the hop- per support plate (19), remove plate and set...

  • Page 18

    18 j1 location fmd-1 the front door lamp ballast is located behind the front access panel on the left front side of the com- ponent bracket. Fmd-2 the front door lamp ballast is located behind the front access panel on the left rear side of the com- ponent bracket. Test procedure 1. Disconnect the d...

  • Page 19

    19 12 11 9 8 7 j4 j1 j2 j3 j1 service (cont.) a) 120 volts ac for two wire 120 volt models. B) 208 volts ac for three wire 120/208 volt models. C) 240 volts ac for three wire 120/240 volt models. 5. Disconnect the dispenser from the power source. If voltage is present as described the control thermo...

  • Page 20

    20 service (cont.) control board - fmd-2 only (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 120 volt...

  • Page 21

    21 release bu tto n w hen cup is 2/3 full place cup here pu sh an d h ol d b ut to n u nt il cu p is 2/3 fu ll , t he n r el ea se release button when cup is 2/3 full place cup here place cup here pu sh an d h ol d b ut to n u nt il c up is 2/ 3 f ul l, t he n r el ea se dispense switch(s) - fmd-1 &...

  • Page 22

    22 service (cont.) dispense switch(s) - fmd-1 & fmd-2 (cont.) test procedure: 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. 4. Check for v...

  • Page 23

    23 j1 fig. 14 dispense switch terminals p1449 blk red service (cont.) dispense switch(s) - fmd-1 & fmd-2 (cont.) left right blk red/whi blk red orn blu/whi orn blk/whi fmd-1 fmd-2 fan - fmd-1 & fmd-2 fig. 15 fan location: the fan is located inside the dispenser hous- ing on the right rear of the dis...

  • Page 24

    24 j1 service (cont.) frother and whipper motor - fmd-1 (shown) & fmd-2 fig. 17 frother and whipper motor location: the frother(s) is (are) located behind the dis- penser door, mounted on the front panel inside the whipper chamber. The whipper motor(s) is (are) located on the back side of the whippe...

  • Page 25

    25 service (cont.) frother and whipper motor - fmd-1 (shown) & fmd-2 (cont.) fig.19 whipper motor terminals p1221 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 the two #4-...

  • Page 26

    26 service (cont.) hopper drive board - fmd-1 only fig. 20 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. 2. Disconnect the white/red wire and the whit...

  • Page 27

    27 12 11 9 8 7 j4 j1 j2 j3 j1 hopper drive board - fmd-1 only (cont.) service (cont.) j1 j1 connector for three pin plug from potentiometer red from hopper motor fig. 21 hopper drive board terminals p1669 blk from hopper motor red/whi from main harness whi from main harness increase/decrease switch ...

  • Page 28

    28 lamp holder - fmd-1 (shown) & fmd-2 fig. 24 lamp holders p1670 3 4 6 1. Door assy 2. Lamp holders 3. Lamp 4. Upper panel 5. Lower panel 6. Starter w/socket 5 2 1 location: the lamp holders are located on the front of the upper panel behind the display panel. Test procedure: 1. Disconnect the disp...

  • Page 29

    29 j1 level control board and level probe - fmd-1 only fig. 25 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 t...

  • Page 30

    30 service (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. 3. Check the voltage across terminals 2 & 3 with a voltmeter. Connect the dispenser to the power source. The indication mu...

  • Page 31

    31 j1 rinse/run switch - fmd-1 fig. 29 rinse/run switch location: the rinse/run switch is located on the lower left side of the whipper motor mounting panel. Test procedures: 1. Disconnect the dispenser from the power source. 2. Check for continuity between center terminal and the upper terminal wit...

  • Page 32

    32 12 11 9 8 7 j4 j1 j2 j3 j1 service (cont.) 2. Remove the facenut securing the run/rinse switch to the dispenser front panel. 3. Remove switch with wires attached from the back side of the front panel. 4. Disconnect the wires from the switch and dis- card the switch. 5. Refer to fig. 30 when conne...

  • Page 33

    33 12 11 9 8 7 j4 j1 j2 j3 j1 solenoid valve (cold water optional)(fmd-2 only) 6. Check the solenoid valve for coil action. Connect the dispenser to the power source. With the cold jumper plug installed press the left dispense switch and listen carefully in the vicinity of the solenoid valve for a “...

  • Page 34

    34 j1 j1 solenoid valve (dispense) - fmd-1 & fmd-2 fig. 36 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. For fmd-1 disconnect the red and white wires from the solenoid va...

  • Page 35

    35 j1 service (cont.) fig. 34 dispense solenoid valve terminals p1672 remove panel and set aside. 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...

  • Page 36

    36 j1 tank heater - fmd-1 (shown) & fmd-2 fig. 39 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 wi...

  • Page 37

    37 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. 2. Disconnect the water supply tube on the tank lid. 3. Disconnect the black wires on the limit thermstat. 4. Disconnec...

  • Page 38

    38 12 11 9 8 7 j4 j1 j2 j3 j1 service (cont.) fig. 42 tank heater switch terminals p1219 blk to main harnesss blk from main harness transformer - fmd-2 only fig. 43 transformer p1666 location: the transformer is located behind the lower front access cover, mounted on the right rear side of the compo...

  • Page 39

    39 sol dispense m whipper m hopper run/rinse switch whi red whi red red red red red blk-16 120 volts a c - 2 wire 120/208-240 volts ac - 3wire single phase 29096.0000c 8/98 © 1998 bunn-o-matic corporation schematic wiring diagram fmd-1 grn grn grn grn l1 n l2 limit thermostat blk-16 tank heater red-...

  • Page 40

    40 grn grn grn whi whi whi whi whi whi sol left dispense m left whipper m left hopper m right hopper m right whipper sol right dispense blk blk whi whi whi whi whi whi red red blu blu red red red red jumper plug must be used when cold drink feature not installed red sol cold drink option (left only)...