Bunn FMD-4 User Manual

OPERATING & SERVICE MANUALBUNN-O-MATIC CORPORATIONPOST OFFICE BOX 3227SPRINGFIELD, ILLINOIS 62708-3227PHONE: (217) 529-6601 FAX: (217) 529-6644

10TROUBLESHOOTING (cont.)PROBLEMWater is not hot (Cont.)Spitting or excessive steamingDripping from dispense tipWater flows into tank continuouslyPROB

11TROUBLESHOOTING (cont.)PROBLEMProduct overflows containerWeak productPROBABLE CAUSE1. Dispense Switch2. Dispense Solenoid Valve1. Water Temperature2

12TROUBLESHOOTING (CONT.)PROBLEMDispenser is making unusualnoisesExcess dustDisplay not litPROBABLE CAUSE1. Plumbing Lines2. Water Supply3. Tank Heate

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14SERVICEAUGER DRIVE COMPONENTS - FMD-4 (CONT.)5. Check the voltage across the positive (red wire)terminal and the negative (black wire) terminal onth

15J4J1J2J3J4J1J2J3SERVICE (cont.)RED to BRN/WHI fromControl Board #1 J3-3RED to WHI/RED fromControl Board #1 J3-2RED to WHI/ORN fromControl Board #1 J

16SERVICE (cont.)AUGER DRIVE COMPONENTS - FMD-4 & FMD-5(cont.)4. Disconnect the dispenser from the power supply.If voltage is present as described

17SERVICE (cont.)AUGER DRIVE COMPONENTS - FMD-4 & FMD-5(cont.)Auger Drive Motor (Refer to Fig. 5)1. Remove all hopper assemblies (20) and set asi

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19J1J2CONTROL THERMOSTAT - FMD-4 & FMD-5FIG. 9 CONTROL THERMOSTATP2635LocationThe control thermostat is located at the upper leftrear of the dispe

2INTRODUCTIONThis equipment dispenses hot beverages or soups on demand from powdered product. It is for indoor use only on a sturdy counteror shelf.B

20J4J1J2J3J4J1J2J35. Reconnect the six pin connector of the wiringharness to J3 of the control board.6. Disconnect the four pin connector from J4 ofco

21SERVICE (cont.)16. Reconnect the ten pin connector of the wiringharness to J2 of control board #1.17. Gently pull the liquid level probe out of the

22J4J1J2J3J4J1J2J3Tank Heater Relay Control Circuitry (Control Board#2)(120V dispensers only):1. Disconnect the dispenser from the power source.2. Dis

23PLACECUP HEREPLACECUP HEREPLACECUP HEREPLACECUP HEREPLACECUP HERERELEASE BUTTON WHEN CUP IS 2/3 FULL! WARNINGH O TL I Q U I DPUSH and HOLD BUTTON U

24SERVICE (cont.)DISPENSE SWITCHES (cont.)7. Check for continuity across the terminals (topright to top left; bottom right to bottom left) of thedispe

25J4J1J2J3J4J1J2J3SERVICE (cont.)FANFIG. 15 FANLocation:The fan is located inside the dispenser housingon the center rear of the dispenser base plate

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27SERVICE (cont.)FROTHER AND WHIPPER MOTOR - FMD-4(shown) & FMD-5 (cont.)FIG.19 WHIPPER MOTOR TERMINALSP12214. Disconnect vacuum hose (12) from f

28J4J1J2J3J4J1J2J3SERVICE (cont.)INCREASE/DECREASE SWITCHFIG. 20 INCREASE/DECREASE SWITCHP2635Location:The increase/decrease switch is located on thel

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3This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA)

309. Reconnect the plug on the door wiring harness tothe connector on the door interconnect wiringharness.10. Install the door lower panel (5) using s

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36SERVICE (cont.)FIG. 32 DISPENSE SOLENOID VALVETERMINALSP1672Removal and Replacement:1. Remove the four #8-32 screws securing the sideaccess panel to

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39J4J1J2J3J4J1J2J3SERVICE (cont.)FIG. 38 TANK HEATER SWITCH TERMINALSP1219BLK to MainHarnesssBLK from MainHarnessFIG. 37 TANK HEATER SWITCHTANK HEATER

4INITIAL SET-UP1. Locate the drip tray assembly inside the dispenser door.2. Remove the drip tray and the drip tray cover and set them aside.ELECTRICA

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42GRNGRYWHI/GRYBRN/BLKBRN/BLKBLKINCDECINCREASE/DECREASESWITCHRINSE/PROGRAM/RUN SWITCHRUNRUNPGMPGMRINSERINSEWHI/VIORED/BLKGRNGRNGRNGRNGRYPNKWHI/ORNWHI/

43GRNGRYWHI/GRYBRN/BLKBRN/BLKBLKINCDECINCREASE/DECREASESWITCHRINSE/PROGRAM/RUN SWITCHRUNRUNPGMPGMRINSERINSEWHI/VIORED/BLKGRNPROBEGRNGRNGRNGRYPNKWHI/OR

44GRNGRYWHI/GRYBRN/BLKBRN/BLKBLKINCDECINCREASE/DECREASESWITCHRINSE/PROGRAM/RUN SWITCHRUNRUNPGMPGMRINSERINSEWHI/VIORED/BLKGRNGRNGRNGRNGRYPNKWHI/ORNWHI/

45GRNGRYWHI/GRYBRN/BLKBRN/BLKBLKINCDECINCREASE/DECREASESWITCHRINSE/PROGRAM/RUN SWITCHRUNRUNPGMPGMRINSERINSEWHI/VIORED/BLKGRNPROBEGRNGRNGRNGRYPNKWHI/OR

5INITIAL FILL & HEATCAUTION - The dispenser must be disconnected from the power source throughout the initial set-up, exceptwhen specified in the

6COLD BEVERAGE SET-UP (OPTIONAL)Cold beverages may be dispensed from the left dispense position. Simply place the HOT/COLD switch near the leftwhipper

7DRAINING THE HOT WATER TANKCAUTION - The dispenser must be disconnected from the power source throughout these steps.1. Disconnect the dispenser from

8TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problemsencountered. If the problem r

9TROUBLESHOOTING (cont.)PROBLEMProduct will not dispense (cont.)Water is not hotPROBABLE CAUSE5. Solenoid Valve (Inlet)6. Control Board #1 and Probe7.