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- FMD DBC-3
- Operating & Service Manual
Bunn FMD DBC-3 Operating & Service Manual
Summary of FMD DBC-3
Page 1
Operating & service manual bunn-o-matic corporation post office box 3227 springfield, illinois 62708-3227 phone: (217) 529-6601 fax: (217) 529-6644 www.Bunn.Com 29215.0000f 01/06 ©1998 bunn-o-matic corporation fmd dbc-3 fmda dbc-3 sn fmd0013000-up.
Page 2
2 29215 070502 bunn-o-matic commercial product warranty bunn-o-matic corp. (“bunn”) warrants equipment manufactured by it as follows: 1) all equipment other than as specified below: 2 years parts and 1 year labor. 2) electronic circuit and/or control boards: parts and labor for 3 years. 3) compresso...
Page 3: Warning
3 00656.0000 00831.0000 user notices (cont.) warning ! Fill water tank before turning - on - thermostat or connecting appliance to power source. Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use nea...
Page 4
4 initial set-up 1. Locate the drip tray assembly above 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, ap...
Page 5
5 initial fill & heat caution - the dispenser must be disconnected from the power source throughout the initial fill & heat, 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 pro...
Page 6
6 dispenser use 1. Simply place a cup on the drip tray beneath the desired dispensing tip. 2. A) momentarily press the appropriate dispense switch to froth and dispense the beverage. The dispenser will automatically dispense the beverage for the programmed dispense time at the programmed hopper disp...
Page 7
7 d. To return the dispense rate to the factory preset, press and hold down stop switch and press the medium switch. When the medium switch is pressed, the l.E.D. On that position will flash on and off to indicate the switch was recognized. E. Return the rinse/run switch to the “run” position. F. Ex...
Page 8
8 e. To reset the password to 0 (no password,) enter the old password, then press and hold any two dispense size switches on any one of the positions for 10 seconds. All 3 position l.E.D.’s will begin flashing indicating that the dispenser is ready to accept a new password. Then just wait 5 seconds ...
Page 9
9 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 10
10 problem product will not dispense (cont.) water is not hot probable cause 4. Dispense solenoid valve (hot or cold) 5. Solenoid valve (inlet) 6. Control board 7. Overflow protection switch 8. Auger drive 9. Water strainer 10. Lime build-up caution - tank and tank compo- nents should be delimed reg...
Page 11
11 troubleshooting (cont.) problem water is not hot (cont.) spitting or excessive steaming dripping from dispense tip water flows into tank continuously probable cause 2. Control thermostat 3. Tank heater 4. Tank heater switch 1. Lime build-up caution - tank and tank compo- nents should be delimed r...
Page 12
12 troubleshooting (cont.) problem probable cause remedy water flows into tank continuously (cont.) product overflows container weak product 3. Overflow protection switch 1. Digital touch control switch 2. Dispense solenoid valve (hot or cold) 3. Dispense time excessive 1. Water temperature 2. Whipp...
Page 13
13 probable cause 7. Auger motor 8. Rinse/run switch 9. Rinse timer 1. Plumbing lines 2. Water supply 3. Tank heater 1. Fan 2. Control board 1. Lamp 2. Lamp holder 3. Starter - lamp 4. Ballast remedy refer to service - auger drive com- ponents. See page 15 refer to service - rinse/run switch for tes...
Page 14
14 troubleshooting (cont.) problem hot water will not dispense ready lamp will not light ready lamp lights constantly probable cause 1. Dispense solenoid valve 2. Digital touch control switch 3. Auxiliary control board 1. Tank heater switch 2. Control thermostat 3. Digital touch control switch 4. Au...
Page 15
15 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 16
16 service auger drive components (cont.) 4. Disconnect the dispenser from the power supply. If voltage is present as described and the auger mo- tor does not rotate, replace the auger motor. If voltage is not present as described, refer to the wir- ing diagrams and check the dispenser wiring harnes...
Page 17
17 service auger drive components (cont.) p2210.30 12 13 14 11 15 16 late models 1. Hopper lid 2. Agitator disk assy 3. Auger drive shaft bushing 4. Mixing blade 5. Auger drive shaft 6. Auger drive bracket 7. Locknut 8. Hopper 9. Auger wire 10. Ejector elbow 11. Auger motor mount- ing panel 12. Auge...
Page 18
18 service (cont.) auger drive components (cont.) auger drive motor (refer to figs. 2 & 3) 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), and hopper locator bracket (21) remove plate and bracket and set asi...
Page 19
19 service (cont.) auxiliary control board fig. 5 auxiliary control board p1646 location: the auxiliary control board is located behind the lower front access cover, mounted on the rear side of the component bracket. Hot water dispense test procedure: 1. Disconnect the dispenser from the power sourc...
Page 20
20 service (cont.) auxiliary control board (cont.) removal and replacement: 1. Loosen the two #8-32 screws securing the com- ponent mounting bracket to the dispenser hous- ing. 2. Slide the component mounting bracket forward until the screw heads align with the large diam- eters of the keyhole openi...
Page 21
21 blk to blu from main wiring harness service (cont.) ballast fig. 7 ballast location the front door lamp ballast is located behind the front access panel on the left side of the compo- nent bracket. Test procedure 1. Disconnect the dispenser from the power source. 2. Disconnect the two black leads...
Page 22
22 service (cont.) control board fig. 9 control board location: the control board is located behind the lower front access cover mounted on the component bracket. Test procedure: liquid level control circuitry: 1. Disconnect the dispenser from the power source. 2. Disconnect the eight pin connector ...
Page 23
23 if voltage is present as described, proceed to step 16. If the voltage is not present as described, replace the control circuit board. 16. Reconnect the eight pin connector of the wiring harness to j1 of the control board. 17. Gently pull the liquid level probe out of the tank lid and inspect for...
Page 24
24 control thermostat fig.11 control thermostat location the control thermostat (mechanical or elec- tronic) is located inside the dispenser on the upper left side of the housing. Test procedure mechanical thermostat 1. Disconnect the dispenser from the power source. 2. Disconnect the black wire of ...
Page 25
25 service (cont.) electronic thermostat (optional) 1. Disconnect the dispenser from the power source. 2. Disconnect the black wire of the control thermo- stat from the black wire from the limit thermostat. 3. Remove temperature probe from the tank. 4. With a voltmeter check the voltage across the b...
Page 26
26 5. On dispensers with a hot water valve only, with a voltmeter, and using pin 1 (green/black wire) of the multi-pin connector of the door wiring harness as a reference (-), check for voltage at pin 13 (blue/ red wire). Connect the dispenser to the power source. The indication must be approximatel...
Page 27
27 p1685 fig. 14 digital touch control switch to door interconnect harness connector service (cont.) digital touch control switch (cont.) removal and replacement: 1. Open the dispenser door. 2. Remove the five #6-32 screws securing the bot- tom door cover and remove cover. 3. Disconnect the wires on...
Page 28
28 fan fig. 15 fan p1682.40 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 across the b...
Page 29
29 removal, cleaning and replacement (refer to fig. 18): 1. Open the dispenser door and raise the top front cover. 2. Lift the front edge of the each hopper assembly over the tab on the hopper support panel and slide each hopper assembly out the front of the dis- penser. Set aside for reassembly. 3....
Page 30
30 service (cont.) frother and whipper motor (cont.) 20. Slide whipper chamber receptacle w/seal (8) and o-ring (5) on to the motor shaft. 21. Rotate the receptacle w/seal (8) counterclockwise until it snaps into place on the motor mounting nuts (7). 22. Push frother (6) onto the motor shaft, making...
Page 31
31 lamp holder fig. 22 lamp holders p1454.70 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 leads on the...
Page 32
32 service (cont.) removal and replacement: (refer to fig. 22) 1. Open dispenser door (1). 2. Remove the five #6-32 screws securing lower door panel (5) to the door (1) and remove cover. 3. Disconnect the door wiring harness from the door interconnect wiring harness. 4. Remove five #6-32 screws secu...
Page 33
33 fig. 24 limit thermostat terminals overflow protection switch p1682.40 fig. 25 overflow protection switch location: the overflow protection switch is located in- side the copper overflow cup on the left side of the tank. Test procedures: 1. Disconnect the dispenser from the power source. 2. Remov...
Page 34
34 service (cont.) overflow protection switch (cont.) if continuity is present as described, reconnect the red wires to the black wire and the blue wire from the main harness. If continuity is not present as described, replace the overflow protection switch. Removal and replacement: 1. Disconnect th...
Page 35
35 solenoid valve (cold water - optional) fig. 29 cold water solenoid valve p1682.40 a) 120 volts ac for two wire 120 volt models b) 120 volts ac for three wire 120/208 or 120/240 volt models c) 240 volts ac for two wire 240 volt models. D) 230 volts ac for two wire 230 volt models. 4. Disconnect th...
Page 36
36 4. Disconnect the water lines to and from the sole- noid valve. 5. Loosen the two #8-32 screws and washers se- curing the solenoid mounting bracket to the base. Remove solenoid bracket and solenoid valve as an assembly. 6. Remove the two #10-32 screws and lockwashers securing the solenoid valve t...
Page 37
37 fig. 32 dispense solenoid valve terminals p1645 left center right tan to main harness whi to main harness orn to main harness whi to main harness whi/vio to main harness whi to main harness service (cont.) removal and replacement: 1. Remove the white and white/violet, orange or tan wires from the...
Page 38
38 solenoid valve (inlet) fig. 35 inlet solenoid valve p1682.40 location: the inlet solenoid is located inside on the left rear of the dispenser housing. Test procedures: 1. Disconnect the dispenser from the power source. 2. With a voltmeter check the voltage across the white and violet wires at the...
Page 39
39 service (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 wa...
Page 40
40 p1684.40 service (cont.) tank heater (cont.) 5. Check for continuity across the tank heater termi- nals. If continuity is present as described, reconnect the wires, the tank heater is operating properly. If continuity is not present as described, replace the tank heater. Note - if the tank heater...
Page 41
41 service (cont.) test procedure: 1. Disconnect the dispenser from the power source. 2. Disconnect the black or white/brown wires from the main harness. 3. With the switch in the “on” (lower) position check for continuity between the center and the upper terminal. With the switch in the “off” (uppe...
Page 42
42 transformer (cont.) service (cont.) 5. Check the voltage between j1-1 and j1-2 on the eight pin connector at the control board. Connect the dispenser to the power source. The indication must be 24 volts ac. If voltage is present as described the transformer is operating properly. If voltage is no...
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43 29215 101598.
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44 29215 101598.
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45 29215 031500
Page 46
46 l2 l1 230 volts ac ce 2 wire + gnd single phase 50/60 hz blu/red whi/red blk/whi orn/blk red/blk blu/blk blu/whi orn whi/blk blk red red/whi grn/blk orn red run rin s e gr y whi/blu whi/orn whi/red grn whi/brn brn/blk red/blk whi/vio-22 whi/vio blu-22 blu-22 blu blk blu/blk blu/blk whi whi whi/vi...