Bunn FMD-3 Manuel de service

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

10PROBLEMProduct will not dispense (cont.)Water is not hotPROBABLE CAUSE4. Dispense Solenoid Valve (Hot or Cold)5. Solenoid Valve (Inlet)6. Control

11TROUBLESHOOTING (cont.)PROBLEMWater is not hot (cont.)Spitting or excessive steamingDripping from dispense tipWater flows into tank continuouslyPROB

12TROUBLESHOOTING (cont.)PROBLEM PROBABLE CAUSEREMEDYWater flows into tank continuously(cont.)Product overflows containerWeak product3. Overflow Prote

13PROBABLE CAUSE7. Auger Motor8. Rinse/Run Switch9. Rinse Timer1. Plumbing Lines2. Water Supply3. Tank Heater1. Fan2. Control Board1. Lamp2. Lamp Hold

14TROUBLESHOOTING (cont.)PROBLEMHot water will not dispenseReady lamp will not lightReady lamp lights constantlyPROBABLE CAUSE1. Dispense solenoid val

15SERVICEThis section provides procedures for testing andreplacing various major components used in thisdispenser should service become necessary. Re

16SERVICEAUGER DRIVE COMPONENTS (CONT.)4. Disconnect the dispenser from the power supply.If voltage is present as described and the auger mo-tor does

17SERVICEAUGER DRIVE COMPONENTS (CONT.)P2210.3012 13 14 11 15 16Late Models1. Hopper Lid2. Agitator Disk Assy3. Auger Drive ShaftBushing4. Mixing Bla

18SERVICE (cont.)AUGER DRIVE COMPONENTS (cont.)Auger Drive Motor (Refer to Figs. 2 & 3)1. Remove all hopper assemblies (20) and set asidefor reas

19SERVICE (cont.)AUXILIARY CONTROL BOARDFIG. 5 AUXILIARY CONTROLBOARDP1646Location:The auxiliary control board is located behindthe lower front access

229215 070502BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment oth

20SERVICE (cont.)AUXILIARY CONTROL BOARD (cont.)Removal and Replacement:1. Loosen the two #8-32 screws securing the com-ponent mounting bracket to the

21BLK to BLUfrom MainWiring HarnessSERVICE (cont.)BALLASTFIG. 7 BALLASTLocationThe front door lamp ballast is located behindthe front access panel on

22SERVICE (cont.)CONTROL BOARDFIG. 9 CONTROL BOARDLocation:The Control Board is located behind the lowerfront access cover mounted on the component b

23If voltage is present as described, proceed to step 16.If the voltage is not present as described, replace thecontrol circuit board.16. Reconnect t

24CONTROL THERMOSTATFIG.11 CONTROL THERMOSTATLocationThe control thermostat (mechanical or elec-tronic) is located inside the dispenser on the upperle

25SERVICE (cont.)Electronic Thermostat (Optional)1. Disconnect the dispenser from the power source.2. Disconnect the black wire of the control thermo-

265. On dispensers with a hot water valve only, with avoltmeter, and using pin 1 (green/black wire) ofthe multi-pin connector of the door wiring harne

27P1685FIG. 14 DIGITAL TOUCH CONTROLSWITCHTO DOOR INTERCONNECTHARNESS CONNECTORSERVICE (cont.)DIGITAL TOUCH CONTROL SWITCH (cont.)Removal and Replacem

28FANFIG. 15 FANP1682.40Location:The fan is located inside the dispenser hous-ing on the right rear of the dispenser base plate.Test Procedures:1. Di

29Removal, Cleaning and Replacement (Refer to Fig. 18):1. Open the dispenser door and raise the top frontcover.2. Lift the front edge of the each hopp

300656.000000831.0000USER NOTICES (cont.)WARNING!Fill water tank before turning - on - thermostat or connecting applianceto power source.Use only on a

30SERVICE (cont.)FROTHER AND WHIPPER MOTOR (cont.)20. Slide whipper chamber receptacle w/seal (8) andO-ring (5) on to the motor shaft.21. Rotate the

31LAMP HOLDERFIG. 22 LAMP HOLDERSP1454.70Location:The lamp holders are located on the front ofthe upper panel behind the display panel.Test Procedure:

32SERVICE (cont.)Removal and Replacement: (Refer to Fig. 22)1. Open dispenser door (1).2. Remove the five #6-32 screws securing lowerdoor panel (5) to

33FIG. 24 LIMIT THERMOSTAT TERMINALSOVERFLOW PROTECTION SWITCHP1682.40FIG. 25 OVERFLOW PROTECTION SWITCHLocation:The overflow protection switch is loc

34SERVICE (cont.)OVERFLOW PROTECTION SWITCH (cont.)If continuity is present as described, reconnect thered wires to the black wire and the blue wire

35SOLENOID VALVE (COLD WATER - OPTIONAL)FIG. 29 COLD WATER SOLENOID VALVEP1682.40a) 120 volts ac for two wire 120 volt modelsb) 120 volts ac for three

364. 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

37FIG. 32 DISPENSE SOLENOID VALVETERMINALSP1645LEFTCENTERRIGHTTAN to Main HarnessWHI to MainHarnessORN to MainHarnessWHI to MainHarnessWHI/VIO to Main

38SOLENOID VALVE (INLET)FIG. 35 INLET SOLENOID VALVEP1682.40Location:The inlet solenoid is located inside on the leftrear of the dispenser housing.Te

39SERVICE (cont.)7. Disconnect the dispenser from the power source.If the sound is heard as described and water will notpass through the solenoid valv

4INITIAL SET-UP1. Locate the drip tray assembly above the dispenser nested in the packing material.2. Remove the drip tray and the drip tray cover and

40P1684.40SERVICE (cont.)TANK HEATER (cont.)5. Check for continuity across the tank heater termi-nals.If continuity is present as described, reconnect

41SERVICE (cont.)Test Procedure:1. Disconnect the dispenser from the power source.2. Disconnect the black or white/brown wires fromthe main harness.3.

42TRANSFORMER (cont.)SERVICE (cont.)5. Check the voltage between J1-1 and J1-2 on theeight pin connector at the control board. Connectthe dispenser to

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46L2L1230 VOLTS AC CE2 WIRE + GNDSINGLE PHASE 50/60 HZBLU/REDWHI/REDBLK/WHIORN/BLKRED/BLKBLU/BLKBLU/WHIORNWHI/BLKBLKREDRED/WHIGRN/BLKORNREDRUNRINSEGRY

5INITIAL FILL & HEATCAUTION - The dispenser must be disconnected from the power source throughout the initial fill & heat, exceptwhen specifie

6DISPENSER USE1. Simply place a cup on the drip tray beneath the desired dispensing tip.2. a) Momentarily press the appropriate dispense switch to fro

7d. To return the dispense rate to the factory preset, press and hold down stop switch and press the mediumswitch. When the medium switch is pressed,

8e. To reset the password to 0 (no password,) enter the old password, then press and hold any two dispense sizeswitches on any one of the positions fo

9TROUBLESHOOTINGA troubleshooting guide is provided to suggest probable causes and remedies for the most likely problemsencountered. If the problem r