Bunn FMD-1 FMD-2 manual

OPERA TING & SERVICE MANUAL BUNN-O-MA TIC CORPORA TION POST OFFICE BOX 3227 SPRINGFIELD, ILLINOIS 62708-3227 PHONE: (217) 529-6601 F AX: (217) 529-6644 29112.0000C 01/06 ©1998 Bunn-O-Matic Corporation FMD-1 FMD-2 S/N FMD0013000-UP RELEAS E BUTTON W HEN CUP IS 2/3 FULL PLACE CUP HER E PUSH and HOLD BUTTON UNTIL CUP IS 2/3 FULL, THEN RELEASE R E[...]

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. W ARRANTY Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercially free from defects in material and workmanship existing at the time of manufacture and appearing [...]

3 This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and 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 00831.0000 2[...]

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, apply non-skid pads to the bottom of the legs and[...]

5 INITIAL FILL & HEA T CAUTION - The dispenser must be disconnected from the power sour ce 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 level and then shut-off. This will take less [...]

6 COLD BEVERAGE SET -UP (OPTIONAL FMD-2 ONL Y) 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 harness. 4. Remove the Hot jumper connection (red jum[...]

7 HOPPER MOTOR SPEED PROGRAMING (FMD-2) The hopper dispense rate is preset at the factory. With 22 tooth gear and auger wire the preset dispense rate is approximately 3 to 5 grams per second. With 32 tooth gear and auger wire the preset dispense rate is approximately 5 to 7 grams per second. The hopper dispense rate can be adjusted to a range of di[...]

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 electrical equipment should be performed only by qual[...]

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 - Tank and tank compo- nents should be delimed regul[...]

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 conditions. Excessive mineral build-up on stain- less[...]

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 7. Auger Motor - FMD-1 Auger Motor - FMD-2 8. Rin[...]

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 should not be rest- ing on the counter top. (A) T[...]

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 equipment should be performed only by quali- fied servic[...]

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 to the power supply. After a .6 second delay the [...]

15 12 11 9 8 7 J4 J1 J 2 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, washer and locknut, which are located on the ou[...]

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 harness. Removal, Cleaning and Replacement Hopp[...]

17 SERVICE (cont.) AUGER DRIVE COMPONENTS - FMD-2 (cont.) Removal, Cleaning and Replacement Hopper & Auger (Late Models)(Refer to Fig. 6) 1. Open the dispenser door and raise the top front cover . 2. Lift the front edge of hopper assy (20) over the tab on hopper support plate (19) and slide hop- per assembly out the front of the dispenser . 3. [...]

18 BALLAST - FMD-1 & FMD-2 P1666 FIG. 8 BALLAST SERVICE (cont.) AUGER DRIVE COMPONENTS - FMD-2 (cont.) Auger Drive Motor (Refer to Fig. 5 or 6) 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 aside for reassembly. 3. Remove the four[...]

19 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. T est Procedure 1. Disconnect the dispenser from the power source. 2. Disconnect the[...]

20 12 11 9 8 7 J4 J1 J2 J3 J 1 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- stat is operating properly. Reinstall bulb into[...]

21 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 volts ac for two wire 120 volt models, three wire [...]

22 RELE ASE BUTTON W HEN CUP IS 2/3 FULL PLACE CUP HERE PUSH and H OLD BUTTO N U NTIL CUP IS 2/3 FULL, THEN RELEASE RELEASE BUTTON WHEN CUP IS 2/3 FULL PLACE CUP HERE PLACE CUP HERE PUSH and HOLD BUTTON UNTIL CUP IS 2/3 FULL, THEN RELEASE DISPENSE SWITCH(S) - FMD-1 & FMD-2 FIG.14 DISPENSE SWITCH P1614 Location: The dispense switch(es) is (are) [...]

23 SERVICE (cont.) DISPENSE SWITCH(S) - FMD-1 & FMD-2 (cont.) T est 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 voltage across the black wire and the red wire[...]

24 J1 FIG. 15 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 F AN - FMD-1 & FMD-2 FIG. 16 F AN Location: The fan is located inside the dispenser hous- ing on the right rear of the dispenser base plate. T est Procedures: 1. [...]

25 J1 SERVICE (cont.) FROTHER AND WHIPPER MOTOR - FMD-1 (shown) & FMD-2 FIG. 18 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 whipper motor mounting panel. T est Procedure: 1. [...]

26 SERVICE (cont.) FROTHER AND WHIPPER MOTOR - FMD-1 (shown) & FMD-2 (cont.) FIG.20 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 #4-40 x .25" screws securing the fan baffle [...]

27 SERVICE (cont.) HOPPER DRIVE BOARD - FMD-1 ONL Y FIG. 21 HOPPER DRIVE BOARD Location The hopper drive board is located inside the dispenser mounted on the auger motor mounting bracket. T est Procedures: 1. Disconnect the dispenser from the power source. 2. Disconnect the white/red wire and the white wire from the hopper speed control board. 3. C[...]

28 12 11 9 8 7 J4 J1 J2 J3 J1 HOPPER DRIVE BOARD - FMD-1 ONL Y (cont.) SERVICE (cont.) J1 J1 Connector for Three Pin Plug from Potentiometer RED from Hopper Motor FIG. 22 HOPPER DRIVE BOARD TERMINALS P1669 BLK from Hopper Motor RED/WHI from Main Harness WHI from Main Harness INCREASE/DECREASE SWITCH - FMD-2 ONLY FIG. 23 INCREASE/DECREASE SWITCH P16[...]

29 LAMP HOLDER - FMD-1 (shown) & FMD-2 FIG. 25 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. T est Procedure: 1. Disconnect the dispenser from the power source. 2. Remove upper [...]

30 J 1 LEVEL CONTROL BOARD AND LEVEL PROBE - FMD-1 ONL Y 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 component bracket. The Level probe is located on the left center of the tank lid just in front of the overflow tube. P1665 9. Reconnect the plug on[...]

31 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 must be 120 volts ac for two wire 120 volt m[...]

32 J1 RINSE/RUN SWITCH - FMD-1 FIG. 30 RINSE/RUN SWITCH Location: The rinse/run switch is located on the lower left side of the whipper motor mounting panel. T est Procedures: 1. Disconnect the dispenser from the power source. 2. Check for continuity between center terminal and the upper terminal with the switch in the “RUN” lower position. Con[...]

33 1 2 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. 31 when connecting wires to the new switch. 6. Install new swi[...]

34 12 11 9 8 7 J4 J1 J2 J3 J1 SOLENOID V AL VE (COLD WA TER OPTIONAL)(FMD-2 ONL Y) 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 “clicking” sound as the magnet attracts. 7.[...]

35 J1 J1 SOLENOID V AL VE (DISPENSE) - FMD-1 & FMD-2 FIG. 36 DISPENSE SOLENOID V AL VE Location: The dispense solenoid is located on the upper left center of the tank. T est Procedures: 1. Disconnect the dispenser from the power source. 2. For FMD-1 disconnect the red and white wires from the solenoid valve. For FMD-2 disconnect orange and whit[...]

36 J1 SERVICE (cont.) FIG. 37 DISPENSE SOLENOID V AL VE 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 the dispense valve(s). 5. Remove the wires from[...]

37 J1 T ANK HEA TER - FMD-1 (shown) & FMD-2 FIG. 40 T ANK HEA TER 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 or 120/240 vol[...]

38 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. Disconnect the black wire and the white or red wire from th[...]

39 1 2 11 9 8 7 J 4 J 1 J 2 J 3 J 1 SERVICE (cont.) FIG. 43 T ANK HEA TER SWITCH TERMINALS P1219 BLK to Main Harnesss BLK from Main Harness TRANSFORMER - FMD-2 ONLY FIG. 44 TRANSFORMER P1666 Location: The transformer is located behind the lower front access cover, mounted on the right rear side of the component bracket. Test Procedure: 1. Disconnec[...]

40 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-16 (3-WIRE MODELS) WHI-16 (2-WIRE MODELS) BLK-16 [...]

41 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) BLK-16 120 VOLTS AC - 2 WIRE 120/208-240 VOLTS AC[...]