Bunn FMD-2 Service Manual

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

10TROUBLESHOOTING (cont.)PROBLEMWater is not hot (Cont.)Spitting or excessive steaming Dripping 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 unusual noisesExcess dustDisplay not litPROBABLE CAUSE1. Plumbing Lines2. Water Supply3. Tank Heat

13SERVICE This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary.

14SERVICEAUGER DRIVE COMPONENTS - FMD-1 (CONT.)5. Check the voltage across the positive (red wire) terminal and the negative (black wire) terminal on

15SERVICE (cont.)RED to Hopper SpeedControl Board (+)BLKtoHopperSpeedControl Board (-)P1639FIG. 3 AUGER MOTOR TERMINALSFIG. 4 AUGER DRIVE COMPONEN

16SERVICE (cont.)AUGER DRIVE COMPONENTS - FMD-2 (CONT.)4. Disconnect the dispenser from the power sup-ply.If voltage is present as described a

17SERVICE (cont.)AUGER DRIVE COMPONENTS - FMD-2 (cont.)Removal, Cleaning and ReplacementHopper & Auger (Late Models)(Refer to Fig. 6)1. Open the

18BALLAST - FMD-1 & FMD-2P1666FIG. 8 BALLAST SERVICE (cont.)AUGER DRIVE COMPONENTS - FMD-2 (cont.)Auger Drive Motor (Refer to Fig. 5 or 6)1. Rem

19J1LocationFMD-1The front door lamp ballast is located behind the front access panel on the left front side of the component bracket.FMD-2The front d

229112 100407BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTYBunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:1) All equipment oth

20SERVICE (cont.) b) 208 volts ac for three wire 120/208 volt models. c) 240 volts ac for three wire 120/240 volt models. d) 230 volts ac for two w

21SERVICE (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 conn

22DISPENSE SWITCH(S) - FMD-1 & FMD-2FIG.14 DISPENSE SWITCHP1614Location: The dispense switch(es) is (are) located on the lower outside of the

23SERVICE (cont.)DISPENSE SWITCH(S) - FMD-1 & FMD-2 (cont.)FMD-11. Disconnect the dispenser from the power source.2. Open the dispenser door and

24J1FIG. 15 DISPENSE SWITCH TERMINALSP1449BLKREDSERVICE (cont.)DISPENSE SWITCH(S) - FMD-1 & FMD-2 (cont.)LEFTRIGHTBLKRED/WHIBLKRED ORNBLU/WH

25J1SERVICE (cont.)FROTHER AND WHIPPER MOTOR - FMD-1 (shown) & FMD-2FIG. 18 FROTHER AND WHIPPER MOTORLocation: The frother(s) is (are) loca

26SERVICE (cont.)FROTHER AND WHIPPER MOTOR - FMD-1 (shown) & FMD-2 (cont.)FIG.20 WHIPPER MOTOR TERMINALSP12215. Remove the steam collector (1) b

27SERVICE (cont.)HOPPER DRIVE BOARD - FMD-1 ONLYFIG. 21 HOPPER DRIVE BOARDLocation The hopper drive board is located inside the dispenser mounted

28HOPPER DRIVE BOARD - FMD-1 ONLY (cont.)SERVICE (cont.)J1 Connector forThree Pin Plug fromPotentiometerRED from HopperMotorFIG. 22 HOPPER DRIVE BOARD

29LAMP HOLDER - FMD-1 (shown) & FMD-2FIG. 25 LAMP HOLDERSP16703461. Door Assy2. Lamp Holders3. Lamp4. Upper Panel5. Lower Panel6. Starter W

3This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, In

30J1LEVEL CONTROL BOARD AND LEVEL PROBE - FMD-1 ONLYFIG. 26 LEVEL CONTROL BOARD AND PROBELocation:The level control board is located behind the lower

31SERVICE (cont.)Test Procedure:1. Disconnect the dispenser from the power source.2. Remove the violet wire from terminal 1 & pink wire from ter

32J1RINSE/RUN SWITCH - FMD-1 FIG. 30 RINSE/RUN SWITCHLocation: The rinse/run switch is located on the lower left side of the whipper motor mounting p

33SERVICE (cont.)Removal and Replacement:1. Open the dispenser door. 2. Remove the facenut securing the run/rinse switch to the dispenser front pane

34SOLENOID VALVE (COLD WATER OPTIONAL)(FMD-2 ONLY)6. Check the solenoid valve for coil action. Connect the dispenser to the power source. With the co

35J1SOLENOID VALVE (DISPENSE) - FMD-1 & FMD-2FIG. 36 DISPENSE SOLENOID VALVELocation: The dispense solenoid is located on the upper left center o

36J1SERVICE (cont.)FIG. 37 DISPENSE SOLENOID VALVE TERMINALSP16723. Remove the two #8-32 securing the auger motor mounting panel to the dispenser hou

37J1TANk HEATER - FMD-1 (shown) & FMD-2FIG.40TANKHEATERLocation: The tank heater is located inside the tank and secured to the tank lid.Test P

38NOTE - If the tank heater remains unable to heat, remove and inspect heater for cracks in the sheath.Removal and Replacement:1. Disconnect the disp

39SERVICE (cont.)FIG.43TANKHEATERSWITCHTERMINALSP1219BLKtoMainHarnesssBLKfromMainHarnessTRANSFORMER - FMD-2 ONLYFIG. 44 TRANSFORMERP1666Locat

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

40SOLDISPENSEMWHIPPERMHOPPERRUN/RINSE SWITCHWHIREDWHIREDREDREDREDRED BLK-16120 VOLTS A C - 2 WIRE 120/208-240 VOLTS AC - 3WIRESINGLE PHASE29096.

4129112 091307SOL DISPENSE M WHIPPER M HOPPER RUN/RINSE SWITCH WHI RED WHI RED RED RED RED RED BLK-16 230 VOLTS AC CE 2 WIRE + GND SINGLE PHA

42GRNGRNGRNWHIWHIWHIWHIWHIWHISOLLEFT DISPENSEMLEFT WHIPPERMLEFT HOPPERMRIGHT HOPPERMRIGHT WHIPPERSOLRIGHT DISPENSEBLKBLKWHIWHIWHIWHIWHIWHI REDR

4329112 091307GRNGRNGRNWHIWHIWHIWHIWHIWHISOLLEFT DISPENSEMLEFT WHIPPERMLEFT HOPPERMRIGHT HOPPERMRIGHT WHIPPERSOLRIGHT DISPENSEBLKBLKWHIWHIWHIWHIWHIWHI

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

6COLD BEVERAGE SET-UP (OPTIONAL FMD-2 ONLY)Cold beverages may be dispensed from the left dispense position as follows:1. Disconnect the dispenser fro

7ADJUSTMENTSThe beverage solenoid is preset to dispense approximately one ounce per second. This amount can be ad-justed:1. Disconnect the dispe

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

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