Instruction/ maintenance manual of the product FMD-1 FMD-2 Bunn
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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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.
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.
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.
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.
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.
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).
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.
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.
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.
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.
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 .
An important point after buying a device Bunn FMD-1 FMD-2 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Bunn FMD-1 FMD-2 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Bunn FMD-1 FMD-2 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Bunn FMD-1 FMD-2 you will learn all the available features of the product, as well as information on its operation. The information that you get Bunn FMD-1 FMD-2 will certainly help you make a decision on the purchase.
If you already are a holder of Bunn FMD-1 FMD-2, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Bunn FMD-1 FMD-2.
However, one of the most important roles played by the user manual is to help in solving problems with Bunn FMD-1 FMD-2. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Bunn FMD-1 FMD-2 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
