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Bunn FMD-1 Coffee Maker

1. 2 AS X dE Y NA 4 TUUS 5 EX XT a SP 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 outside bottom rear of the hopper The auger motors are located on the rear of the auger motor mounting panel Refer to Fig 5 for disassembly and assembly Test Procedures Auger motors Disconnect the dispenser from the power source Disconnect the wires from the motor to be tested Check the voltage across the positive white or ange wire for the right motor or the positive white red wire for the left motor and the negative green wire with a voltmeter With the rinse run switch in the run lower position press and hold the appropriate dispense switch Connect the dis penser to the power supply After a 6 second delay the indication must be 4 0 to 24 5 volts dc audi 29112 101598 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 Hopper amp Auger Early Models Refer to Fig 5 1 Open the dispenser door and raise the top f
2. 5 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the wires to the solenoid see Fig 37 proceed to 76 If continuity is not present as described replace the solenoid valve 6 Check the solenoid valve for coil action Connect the dispenser to the power source With RINSE RUN switch in the RINSE upper position press the dispense switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts T Disconnect the dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block 2 gt el age in the water outlet before the solenoid valve IA RCA the solenoid valve may require inspection for wear UU and removal of waterborne particles If the sound is not heard as described replace the solenoid valve FIG 36 DISPENSE SOLENOID VALVE Location Removal and Replacement The dispense solenoid is located on the upper 1 Open dispenser door and remove the hopper s lett center of the tank 2 Remove the two 8 32 screws securing the hop per panel to the auger motor mounting panel and two 8 32 screws to the whipper mounting panel 35 29112 101598 SERVICE cont SOLENOID VALVE DISPENSE FMD 1 amp FMD
3. Chamber 11 Fan 5 O Ring 12 Vacuum Hose 6 Frother 13 Baffle 7 Receptacle w Seal Removal Cleaning and Replacement Refer to Fig 19 1 Openthe dispenser door and raise the top front cover 2 Lift the front edge of the each hopper assembly over the tab on the hopper support panel and Slide each hopper assembly out the front of the dispenser Set aside for reassembly 3 Remove the four 8 32 screws securing the hop per support panel to auger motor mounting panel and the whipper motor mounting panel Set aside for reassembly 4 Disconnect vacuum hose 12 from fan baffle 13 29112 101598 SERVICE cont FROTHER AND WHIPPER MOTOR FMD 1 shown amp FMD 2 cont 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 Removethe two 74 40 25 screws securing the fan baffle 13 to the whipper motor mounting panel and remove fan baffle Set aside for reas sembly 8 Remove dispense tip 3 and twist the whipper chamber 4 clockwise and pull it off the whipper chamber receptacle 7 9 Pull the frother 6 off the motor shaft Notice the flat side on the shaft and the matching flat inside the frother It is important that these two flats are lined up when reassembling 10 Slip the O ring 5 off the whipper chamber recep tacle 7 11 Slide the receptacle w seal off of the motor shaf
4. 4 Disconnect the black wire and the white or red wire from the tank heater terminals 5 Check for continuity across the tank heater termi nals If continuity is present as described reconnect the wires the tank heater is operating properly If continuity is not present as described replace the tank heater 29112 101598 SERVICE cont TANK HEATER FMD 1 shown amp FMD 2 cont NOTE If the tank heater remains unable to heat remove and inspect heater for cracks in the sheath Removal and Replacement Disconnect the dispenser from the power source Disconnect the water supply tube on the tank lid Disconnect the black wires on the limit thermstat Disconnectthe black wire and the white or red wire from the tank heater terminals 5 Disconnect the pink wire from the liquid level probe and the green wire from the tank 6 Remove the thermostat capillary bulb by firmly pulling up on the capillary at the tank lid This will disengage the grommet from the tank lid 7 Remove the ten 8 32 nuts securing the tank lid to the tank 8 Remove tank lid with limit thermostat liquid level probe and tank heater as an assembly 9 Removethe two hex nuts securing the tank heater to the tank lid Remove tank heater with gaskets and discard Install new tank heater with gaskets on the tank lid and secure with two hex nuts Install tank lid with limit thermostat liquid level probe and tank heater on the tank and sec
5. FMD 1 FMD 2 N FMD0013000 UP OPERATING amp SERVICE MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 29112 0000C 01 06 01998 Bunn O Matic Corporation 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 WARRANTY Bunn O Matic Corp Bunn warrants the equipment manufactured by itto be commercially free from defects in material and workmanship existing at the time of manufacture and appearing within one year from the date of installation In addition 1 Bunn warrants electronic circuit and or control boards to be commercially free from defects in material and workmanship for two years from the date of installation 2 Bunn warrants the compressor on refrigeration equipment to be commercially free from defects in material and workmanship for two years from the date of installation 3 Bunn warrants that the grinding burrs on coffee grinding equipment will grind coffee to meet original factory screen Sieve analysis for three years from date of installation or for 30 000 pounds of coffee whichever comes first This warranty does not apply to any equipment component or part that was not manufactured by Bunn or that in Bunn s judgement has been affected by misuse neglect alteration improper installation
6. 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 regularly depending on local water conditions Excessive mineral build up on stain less steel surfaces can initiate corro sive reactions resulting in serious leaks 10 Transformer 2 1 Limit Thermostat CAUTION Do not eliminate or by pass limitthermostat Use only BOM replacement part 729329 1000 2 Control Thermostat 3 Tank Heater REMEDY Refer to Service Solenoid Valve Inlet for testing procedures See page 36 Referto Service Level Control Board and Probe for testing procedures See page 30 Referto Service Control Board and Probe for testing procedures See page 20 Refer to Service Auger Drive See page 13 Refer to Service Auger Drive See Page 15 A Direction of flow arrow must be pointing towards dispenser B Remove the strainer and check for obstructions Clear or replace Inspectthe tank assembly for exces sive lime deposits Delime as re quired Refer to Service Transformer for testing procedures See page 39 Refer to Service Limit Thermostat for testing procedures See page 32 Refer to Service Control Thermo statfortesting procedures See page 19 Refer to Service Tank Heater
7. Keep the other end of this wire away from any metal surface of the dispenser 7 Check the voltage across terminals 1 amp 3 with a voltmeter Connect the dispenser to the power source The indication must 120 volts ac fortwo wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of approximately 5 seconds 8 Touch the free end of jumper wire to the compo nent bracket The indication must be 0 9 Move the jumper wire away from the component bracket The indication must again be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of approximately 5 seconds Disconnect the dispenser from the power source and remove the jumper wire from terminal 4 1 If voltage is present as described the level control board is operating properly proceed to 711 If voltage is not present as described replace the level control board 11 Reconnect the pink wire to terminal 4 12 Gently pull the probe out of the tank lid and inspect for corrosion Replace it if necessary 13 Place the probe so that neither end is in contact with any metal surface of the dispenser 14 Check the voltage across terminals 1 amp 3 witha voltmeter Connect the dispenser to the power source The indication must be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of app
8. and check dispenser wiring harness 5 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the white and blue wires to the solenoid If continuity is not present as described replace the solenoid valve 34 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 Disconnect the dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a block age in the water line before the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement 1 Loosen the two screws securing the component bracket to the dispenser base Lift the component bracket off of the base and move to the right 2 Remove the white and blue from the solenoid valve 3 Turn off the water supply to the dispenser 4 Disconnect the water lines to and from the sole noid valve 5 Loosenthe two 78 32 screws and washers secur ing the solenoid mounting bracket to the base Remove solenoid bracket and solenoid valve as an assembly 6 Remove the two 710 32 screws and lockwashers
9. be disconnected from the power source throughout these steps 1 Disconnect the dispenser from the power source 2 Open front door and place tank heater switch in the OFF upper position 3 Shut off and disconnect the incoming water supply 4 Remove the top panel 5 Gently remove one of the grommets from the tank lid 6 Insert a tube to the bottom of the tank and syphon ALL of the water out NOTE The dispenser must be refilled using the INITIAL FILL amp HEAT steps before reconnecting to the power Source 7 29112 011906 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 qualified service personnel All electronic components have 120 volt ac and low voltage dc potential on their terminals Shorting of terminals or the application of external voltages may result in board failure Intermittent operation of electronic circuit boards is unlikely Board failure will normally be permanent If an intermittent condition is encountered the cause will likely be a switch contact or a loose connection at a terminal or crimp Solenoid removal requires interrupting the water supply to the valve Damage may result if solenoids are energized for more than t
10. broken components re place any if necessary and reassemble hopper assy Install hopper assy 20 in the dispenser by sliding hopper assy in the guides on the hopper support plate 19 until the slot in the bottom rear the hopper seats against the pin 18 in the hopper support plate gt a 1415161213 P3567 FIG 6 AUGER DRIVE amp HOPPER DISASSEMBLY Hopper Lid Mixing Blade Agitator Disk Auger Drive Shaft Bushing Auger Drive Shaft Locknut Auger Drive Bracket Hopper 9 Auger Wire 10 Ejector Elbow 11 Hopper Assy 12 Auger Motor Mounting Panel 13 Hopper Support Plate 14 Auger Motor Bracket 15 Auger Motor 16 Dust Seal 29112 011906 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 78 32 screws securing the hop per support plate 19 remove plate and set aside for reassembly 3 Remove the four 78 32 locking screws located inside the dispenser housing on the front of the auger motor mounting panel 14 securing auger motor mounting bracket 15 and auger motor 16 tothe rear of the auger motor mounting panel 14 4 Disconnectthe wires from the auger motor 16 to be removed 5 Remove auger motor mounting bracket 15 au ger motor 16 and dust seal 17 as an assembly 6 Remove dust seal 17 from auger moto
11. connect the Cold jumper connection blue jumper plug to the main harness 5 Replace the lower front access panel and reconnect the dispenser to the power source CLEANING Refer to the decal on the rear of the dispenser door for cleaning recommendations and proccedures The use of adamp cloth rinsed in any mild non abrasive liquid detergent is recommended for cleaning all surfaces on Bunn O Matic equipment ADJUSTMENTS The beverage solenoid is preset to dispense approximately one ounce per second This amount can be adjusted 1 Disconnect the dispenser from the power source 2 Remove product hopper s 3 Remove the hole plug s in the auger motor mounting panel 4 Rotate the control atthe base of the solenoid clockwise to decrease or counterclockwise to increase the amount of water 5 Reinstall plug s and hopper s HOPPER MOTOR SPEED ADJUSTMENT FMD 1 The hopper dispense rate is preset at the factory With 8 tooth gear and auger wire the preset dispense rate is approximately 3 to 5 grams per second With 12 tooth gear and auger wire the preset dispense rate is approxi mately 5 to 7 grams per second The hopper dispense rate can be adjusted to a range of dispense rates from approximately 1 5 to 12 grams per second as follows Set the tank heater switch to the off position Open the top front cover of the dispenser and remove the two screws securing the top cover Remove the top cover assembly and set it aside Locate
12. described the hopper motor control circuitry is operating properly If the voltage is not present as described replace the control circuit board Removal and Replacement 1 2 3 Disconnect the three plugs on the main wiring harness from the connectors on the control board Remove the four 76 32 keps nuts securing the control board to the component bracket Remove control board and discard Install new control board on the component bracket using four 76 32 keps nuts Reconnect the three plugs on the main harness to the connectors on the control board 1640 p FIG 13 CONTROL BOARD CONNECTORS DISPENSE SWITCH S FMD 1 amp FMD 2 FIG 14 DISPENSE SWITCH The dispense switch es is are located on the lower outside of the dispenser door 29112 101598 SERVICE cont DISPENSE SWITCH S FMD 1 amp FMD 2 cont Test 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 Checkforvoltage acrossthe black wire and the red wire from the door interconnect wiring harness Connect the dispenser to the power supply The indication must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 208 volt or 120 240 volt
13. for testing procedures See page 37 29112 051200 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 steel surfaces can initiate corro sive reactions resulting in serious leaks 2 Control Thermostat 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 steel surfaces can initiate corro sive reactions resulting in serious leaks 2 Dispense Solenoid Valve 1 A Level Control Board and Probe FMD 1 B Control Board and Probe 2 2 Solenoid Valve Inlet REMEDY Referto Service TankHeater Switch for testing procedures See page 38 Inspect the tank assembly for exces sive lime deposits Delime as re quired Refer to Service Control Thermo stat for testing procedures See page 19 Inspect the tank assembly for exces sive lime deposits Delime as re quired Remove the dispense solenoid valve and clear any obstructions Rebuild or replace the valve if necessary See page 35 Referto Service Level Control Board and Probe for testing procedures See page 30 Refer to S
14. inside the door assy 1 on the top of the door lower panel 5 Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the starter leads from the door wiring harness 3 Remove lamp starter from starter socket 4 Check for continuity on each lead of the starter socket If continuity is present as described the starter socket is operating properly If continuity is not present as described replace the starter socket 5 Remove starter 6 from starter socket 6 Checkforcontinuity across the pins on the bottom of the starter 6 If continuity is presentas described replace the starter If continuity is not present as described starter is operating properly Note If continuity tests are both as described and lamp does not light replace the starter Removal and Replacement Refer to Fig 25 1 Open dispenser door assy 1 2 Remove the four 78 32 screws securing the door lower panel 5 to the door assy 1 Disconnectthe leads on the starter socket from the door wiring harness 4 Remove lower door panel 5 and starter w socket 6 as assembly 5 Compress the spring tabs on the socket and re move socket from the door bottom cover 5 6 Rotate starter 90 and remove from the starter socket 30 7 nsertnew starter 6 into socket and turn 90 until the pins snap in place 8 Install new socket by compressing spring tabs on the socket and pushing the socket up throug
15. limit ther mostat 3 Check for continuity across the limit thermostat terminals If continuity is present as described the limit thermo stat is operating properly If continuity is not present as described replace the limit thermostat Removal and Replacement 1 Remove all wires from the limit thermostat ter minals 2 Carefully slide the limit thermostat out from un der the retaining clip and remove the limit ther mostat 3 Carefully slide the new limit thermostat into the retaining clip 4 Refer to Fig 29 when reconnecting the wires 32 BLK to Tank Heater BLK to Control Thermostat FIG 29 LIMIT THERMOSTAT TERMINALS RINSE RUN SWITCH FMD 1 8 ulli lt S FIG 30 RINSE RUN SWITCH The rinse run switch is located on the lower left side of the whipper motor mounting panel Test 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 Continuity must not be present with the switch in the RINSE upper position If continuity is present as described the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Open the dispenser door 29112 051200 SERVICE cont RINSE RUN SWITCH FMD 1 CONT 2 Remove the face
16. models 5 Disconnect the dispenser from the power source If voltage is present as described proceed to 76 If voltage is not present as described refer to the wir ing diagram and check the dispenser wiring harness 6 Checkfor continuity across the terminals with the switch in the ON pressed position Continuity must not be present when the switch is in the OFF released position If continuity is present as described reconnect the connector to the door interconnect wiring harness the switch is operating properly If continuity is not present as described replace the switch FMD 2 Disconnect the dispenser from the power source Open the dispenser door and remove the bottom door cover 3 Disconnect the wires from the door interconnect wiring harness to the dispense switch to be tested 4 Check for voltage across the black and red white wires for the right dispense switch or the black and red wires for the left dispense switch from the door interconnect wiring harness Connect the dis penser to the power supply The indication must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 208 volt or 120 240 volt models N 23 5 Disconnect the dispenser from the power source If voltage is present as described proceed to 6 If voltage is not present as described referto the wir ing diagram and check the dispenser wiring harness 6 With a voltmeter check the voltage
17. new lamp holder to the door wiring harness Install lamp 3 into lamp holders 2 and turn 90 until the pins snap in place Install upper door panel 4 lamp 3 lamp hold ers 2 and door wiring harness as an assembly using two 28 32 screws Reconnect the plug on the door wiring harness to the connector on the door interconnect wiring harness Install the door lower panel 5 using four 78 32 screws LAMP REPLACEMENT Refer to Fig 25 1 2 3 Open dispenser door 1 Remove the four 8 32 screws securing lower door panel 5 to the door 1 and remove cover Disconnect the door wiring harness from the door interconnect wiring harness Remove two 8 32 screws securing the upper door panel 4 to the door Remove the upper door cover 4 lamp 3 lamp holders 2 and door wiring harness as an assem bly Rotate lamp 3 90 and remove from lamp hold ers 2 Install lamp 3 into lamp holders 2 and turn 90 until the pins snap in place Install upper door panel 4 lamp 3 lamp hold ers 2 and door wiring harness as an assembly using two 8 32 screws 29112 101598 SERVICE cont LAMP REPLACEMENT Refer to Fig 24 cont 9 Reconnect the plug on the door wiring harness to the connector on the door interconnect wiring harness 10 Install the door lower panel 5 using four 78 32 screws LAMP STARTER and SOCKET Refer to Fig 25 Location The lamp starter 6 is located
18. panel 3 Remove the wires from the switch terminals and discard switch 4 Connectthe wires to the new switch refer to Fig 43 5 Push new switch through hole in the front panel and secure with facenut 29112 101598 SERVICE cont BLK to Main Harnesss Q BLK from Main Harness 219 FIG 43 TANK HEATER SWITCH TERMINALS TRANSFORMER FMD 2 ONLY FIG 44 TRANSFORMER Location The transformer is located behind the lower front access cover mounted on the right rear side of the component bracket Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the four pin plug from the main har ness from the four pin connector on the trans former 3 Check the voltage across black wire pin 1 and the white wire pin 2 onthe plug from the main harness Connect the dispenser to power source The indi cation must be a 120 volts ac for two wire 120 volt models b 120 volts for three wire 120 208 volt models and three wire 120 240 volt models 4 Disconnect the dispenser from the power source 39 If voltage is present as described reconnect the plug and the connector and proceed to 5 If voltage is not present as described refer to the wiring diagrams and check the main wiring harness 5 Check the voltage between J1 1 and J1 2 on the eight pin connector at the control board Connect the dispenser to the power source The indication must be 24 vol
19. set aside for reas sembly 2 Remove the four 78 32 screws securing the hop per support plate 12 remove plate and set aside for reassembly Remove the four 28 32 screws located inside the dispenser housing on the lower right front of the auger motor mounting panel 21 securing auger motor mounting bracket 18 and auger motor 19 tothe rear of the auger motor mounting panel 21 4 Disconnectthe wires from the hopper drive board 5 Remove auger motor mounting bracket 18 au ger motor 19 and dust seal 20 as an assembly 6 Remove dust seal 20 from auger motor 19 T Disconnect the wires from the auger motor 19 8 Remove the four 8 32 screws securing the auger motor 19 to the auger motor mounting bracket 18 9 Remove auger motor 19 and discard 10 Using four 8 32 screws install new auger motor 19 on mounting bracket 18 Install dust seal 20 on auger motor shaft and align notch in seal with motor casting Reconnect the wires to the terminals on the hop per drive board Refer to Fig 3 when reconnecting wires Using four 8 32 locking screws install auger motor dust seal and mounting bracket to the rear of the auger motor mounting panel 21 15 Install hopper assy 17 11 12 13 14 RED to Hopper Speed Control Board BLK to Hopper Speed Control Board QR FIG 3 AUGER MOTOR TERMINALS AUGER DRIVE COMPONENTS FMD 2
20. the ballast If continuity is present as described the ballast is operating properly If continuity is not present as described replace the ballast Removal and Replacement FMD 1 1 Disconnect the wires from the ballast 2 Remove the two 78 32 screws securing the bal last to the component bracket 3 Remove and discard ballast 4 Using two 28 32 screws install new ballast on the component bracket 5 Refer to the Fig 9 when reconnecting the wires FMD 2 1 Loosen the two 8 32 screws securing the com ponent bracket to the dispenser housing base 2 Pull component bracket out the front of the dis penser far enough so the leads on the ballast can be disconnected from the main wiring harness and the door interconnect harness 3 Remove the two 78 32 screws securing the ballast the rear of the component bracket 4 Remove and discard ballast 5 Install new ballast on the rear of the component bracket and secure with two 8 32 screws 6 Refer to Fig 9 and reconnect the wires 7 Place the component bracket into position and tighten the two 8 32 screws securing the compo nent bracket to the dispenser housing base from Main Wiring Harness BLK to BLU from Main Harness FIG 9 BALLAST TERMINALS CONTROL THERMOSTAT FMD 1 amp FMD 2 FIG 10 CONTROL THERMOSTAT Location The control thermostat is located under the front tan
21. the motor speed adjuster leftmost on the dispenser cabinet top cross member Using extreme care not to touch the live terminals of the tank heater adjust the motor speed by rotating the motor speed adjuster to the desired point ranging from minimum full counterclockwise to maximum full clockwise 6 After the motor adjustment is complete replace the top cover assembly securing it with the two screws and return the tank heater switch to the on position gud NI 6 29112 011906 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 3to 5 grams per second With 32 tooth gear and auger wire the preset dispense rate is approximately 5to 7 grams per second The hopper dispense rate can be adjusted to a range of dispense rates from approximately 1 5 to 12 grams per second as follows 1 Place the rinse run switch in the center program position 2 Placethe increase decrease switch in the desired increase or decrease position 3 Press and release the dispense switch for the chamber you wish to adjust Each time the dispense switch is pressed the rinse L E D will flash and the motor speed for that hopper will be increased decreased by approximately 2 1 296 4 Return the rinse run switch to the run position after hopper motor speed adjustments are complete DRAINING THE HOT WATER TANK CAUTION The dispenser must
22. whipper chamber 4 25 Using two 4 40 screws secure the fan baffle to the whipper motor mounting panel 26 Install vacuum hose 12 on fan baffle 13 27 Install hopper support panel using four 8 32 screws 28 Slip the mixing chamber 2 onto the mixing chamber water inlet tube far enough so the mixing chamber 2 will seat inside the whipper chamber 4 29 Install the steam collector 1 onto the mixing chamber 2 by pushing down and toward the dispenser while twisting until the flange on the steam collector lines up with the slot in the front panel 30 Install hopper assembly in the dispenser by sliding hopper assembly on the hopper support panel until the slot in the bottom rear of the hopper seats against the shoulder screw in the hopper support panel BLK to Main Harness RED BLK to Main Harness WHI FMD 1 BLK to Main Harness ORN BLK to Main Harness WHI BLK to Main Harness Red 1 Main Harness WHI LEFT RIGHT FMD 2 FIG 20 WHIPPER MOTOR TERMINALS 21221 29112 101598 SERVICE cont HOPPER DRIVE BOARD FMD 1 ONLY Pu 6 21 HOPPER DRIVE BOARD Location The hopper drive board is located inside the dispenser mounted on the auger motor mounting bracket Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the white red wire and the white wire from the ho
23. 2 cont Remove panel and set aside 3 Remove the two 78 32 securing the auger motor mounting panel to the dispenser housing and the two rear 78 32 screws from the side panels 4 Tiltauger motor mounting panel forward allowing access to the dispense valve s 5 Remove the wires from the solenoid valve 6 Turn off the water supply to the dispenser 7 Drain enough water from the tank so the water level is below the dispense valve mounting hole 8 Disconnect the water line from the solenoid valve 9 Remove the 10 32 screw securing the solenoid valve to side of the tank Remove solenoid valve Using the 10 32 screw install new solenoid valve on side of the tank Push the water line onto the tube on bottom of solenoid valve Refer to Fig 37 and reconnect the wires Reassemble auger and hopper components 1 1 12 13 ORN to Main Harness WHI to Main Harness TAN to Main Harness WHI to Main Harness FMD 2 FIG 37 DISPENSE SOLENOID VALVE TERMINALS 36 SOLENOID VALVE INLET 1 amp FMD 2 wi a FIG 38 INLET SOLENOID VALVE The inlet solenoid is located on the lower right side of the rear panel Test Procedures 1 Disconnect the dispenser from the power source 2 Disconnect the white and violet wires from the solenoid valve 3 Checkthe voltage across the white and violet w
24. 673 FIG 5 AUGER DRIVE amp HOPPER DISASSEMBLY 11 Spring 12 Auger Wire 13 Ejector Elbow 14 Auger Motor Mount ing Panel 15 Auger Motor Bracket 16 Auger Motor 17 Dust Seal 18 Pins 19 Hopper Support plate 20 Hopper Assy 29112 011906 SERVICE cont AUGER DRIVE COMPONENTS FMD 2 cont Removal Cleaning and Replacement Hopper amp Auger Late Models Refer to Fig 6 1 10 11 12 13 14 Open the dispenser door and raise the top front cover 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 Remove hopper lid 1 and empty product Pull off the ejector elbow 13 Remove agitator disc assy 2 by pulling agitator support rod 4 towards agitator disc assy and lifting agitator disc assy from hopper 10 Remove auger 12 by pulling it out the front of the hopper 10 Remove auger drive shaft 5 by removing the retaining clip 6 from auger drive shaft Slide washer 8 and auger drive shaft bracket 7 off of the auger drive shaft 5 Slide auger drive shaft 5 from auger drive shaft bushing 3 and remove from hopper 10 Remove locknut 9 from auger drive shaft bush ing 3 and remove auger drive shaft bushing from hopper 10 Wash components in a mild solution of dish de tergent using a bristle brush when needed Rinse and dry each item thoroughly Check for damaged or
25. 8 volt or 120 240 volt models 4 Disconnect the dispenser from the power sup ply If voltage is present as described proceed to 5 If voltage is not present as described refer to the wir ing diagram and check the dispenser wiring harness 29112 101598 SERVICE AUGER DRIVE COMPONENTS FMD 1 CONT 9 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 indication must be 4 0 to 24 5 volts dc If voltage is present as described the auger motor drive is operating properly If auger does not turn replace the auger motor If voltage is not present as described replace the auger hopper drive board Removal Cleaning and Replacement Hopper amp Auger 1 eR oo 1 11 12 13 14 Open the dispenser door and raise the top front cover Lift the hopper assy 17 over the pins 16 on hopper support plate 12 and slide hopper as sembly out the front of the dispenser Remove hopper lid 1 and empty product Pull off the ejector elbow 15 Remove retainer clip 11 and washer 10 from the bottom of the hopper base 9 Remove whipper shaft 3 wiper blade 4 and wiper drive gear 5 from the hopper base 9 Remove auger wire 14 by pulling it o
26. AS SPECIFIED HEREIN TO REPAIR OR AT BUNN S SOLE OPTION REPLACEMENT OR REFUND In no eventshall Bunn be liable for any other damage or loss including but not limited to lost profits lost sales loss of use of equipment claims of Buyer s customers cost of capital cost of down time cost of substitute equipment facilities or services or any other special incidental or consequential damages USER NOTICES Carefully read and follow all notices on the equipment and in this manual They were written for your protection All notices are to be kept in good condition Replace any unreadable or damaged labels WARNING A WARNING RELEASE BUTTON WHEN CUP IS 2 3 FULL RELEASE BUTTON WHEN CUP IS 2 3 FULL PLACE PLACE PLACE CUP HERE CUP HERE CUP HERE FMD 1 28328 0004 FMD 2 28328 0005 2 29112 051200 USER NOTICES Cont AWARNING Fill water tank before turning on thermostat or connecting appliance to power source Use only on a properly protected circuit capable of the rated load Electrically ground the chassis Follow national local electrical codes Do not use near combustibles FAILURE TO COMPLY RISKS EQUIPMENT DAMAGE FIRE OR SHOCK HAZARD READ THE ENTIRE OPERATING MANUAL BEFORE BUYING OR USING THIS PRODUCT THIS APPLIANCE IS HEATED WHENEVER CONNECTED TO A POWER SOURCE 00831 0000F 3 98 O 1988 BUNN O MATIC CORPORATION 00831 0000 This equipment must be installed to comply with the Basic Plumbing Code
27. K WHI 40 29112 101598 SCHEMATIC WIRING DIAGRAM FMD 2 GRN L1 12 N e TANK HEATER CONTROL LIMIT SWITCH __THERMOSTAT THERMOSTAT TANKHERTEA ede roo 6816 y BLK16 jo aE ANAN p poe i 24 1 ge WHI J4 4 lof BLK 5 BLK N 797 0 WHI RED L GEN P WHI GRN 48 6 BRN BLK B 0 R J25 RINSE PROGRAM GRY BUN SWITCH J2 10 707 INCREASE OM DECREASE GRN SWITCH TEET PGM WHI BRN JG hINSE RED BLK Vv RIGHT DISPENSE RIGHT WHIPPER RIGHT HOPPER ORN WHI WHI ORN RED BLK LEFT DISPENSE LEFT HOPPER WHI YEL z a LEFT DISPENSE SWITCH T JUMPER PLUG MUST RED USED WHEN COLD T DRINK FEATURE NOT INSTALLED 120 VOLTS AC 2 WIRE 4 120 208 240 VOLTS AC 3 WIRE SINGLE PHASE 60 HZ WHI 55i BLU lt WHI BLU RED BLK a BLK WHI RIGHT DISPENSE SWITCH 41 29112 101598
28. LDER FMD 1 shown amp FMD 2 FIG 25 LAMP HOLDERS 1 Door Assy 4 Upper Panel 2 Lamp Holders 5 Lower Panel 3 Lamp 6 Starter W Socket Location The lamp holders are located on the front of the upper panel behind the display panel Test Procedure 1 Disconnect the dispenser from the power source 2 Remove upper door panel 4 and disconnect the door wiring harness from the leads on the lamp holders Remove lamp from lamp holders 4 Check for continuity on each lead of the lamp holders m If continuity is present as described lamp holders are operating properly If continuity is not present as described replace the lamp holder 29 Removal and Replacement 14 Open dispenser door 1 Remove the four 78 32 screws securing lower door panel 5 to the door 1 and remove cover Disconnectthe door wiring harness from the door interconnect wiring harness Remove two 8 32 screws securing the upper door panel 4 to the door Remove the upper door cover 4 lamp 3 lamp holders 2 and door wiring harness as an assem bly Disconnect the wires from the lamp holder to be replaced from the door wiring harness Rotate lamp 3 90 and remove from lamp hold ers 2 Remove the 76 32 screw securing the lamp holder 2 to be removed remove lamp holder 2 and discard Install new lamp holder 2 and secure with a 6 32 screw Connect the wires on the
29. RMINALS INCREASE DECREASE SWITCH FMD 2 ONLY FIG 23 INCREASE DECREASE SWITCH Location The increase decrease switch is located on the lower left front of the whipper motor mounting panel 28 Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the wires from the switch terminals 3 Check for continuity between the center terminal and upper terminal with switch in the decrease position lower Check for continuity between the center terminal and the lower terminal with the switch in the increase position upper If continuity is present as described the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Open the dispenser door 2 Remove the facenut securing the increase de crease switch to the whipper motor mounting panel 3 Remove switch with wires attached from the back side of the whipper motor mounting panel 4 Disconnect the wires from the switch and discard the switch 5 Referto Fig 24 when connecting the wires to the new switch 6 Install new switch with wires attached through the hole in the whipper mounting panel and secure with facenut RED BLK from Control Board J2 6 GRN from Control Board J2 9 BRN BLK from Control Board J2 1 FIG 24 INCREASE DECREASE SWITCH TERMINALS 29112 101598 SERVICE cont LAMP HO
30. across the black white and orange wires for the right dispense switch or blue white and orange for the left dispense switch from the door intercon nect wiring harness Connect the dispenser to the power source The indication must be 5 volts dc If voltage is present as described proceed to 7 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring har ness 7 Check for continuity across the terminals top right to top left bottom right to bottom left of the dispense switch with the switch in the ON posi tion Continuity must not present when the switch is in the OFF released position If continuity is present as described reconnect the connector to the door interconnect wiring harness the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Open the dispenser door 2 Remove the five 76 32 screws securing the bot tom door cover and remove cover 3 Disconnect the wires on the dispense switch from the door interconnect wiring harness 4 Compress the clips inside the door on the dis pense switch and gently push the switch through the opening 5 Pushthe new switch into the opening and spread the clips to hold the switch in the door 6 Reconnect the wires to the dispense switch from the door interconnect wiring harness 7 Reinstall the door bottom cover using five 76 32 screws 8 R
31. anel 21 securing auger motor mounting bracket 18 and auger motor 19 to the rear of the auger motor mounting panel 21 4 Disconnect the wires from the terminals on the hopper drive board and disconnect the three pin plug J1 from the hopper drive board 5 Remove auger motor mounting bracket 18 au ger motor 19 dust seal 20 and hopper drive board as an assembly 6 Remove the two 78 32 screws securing the hop per drive board to the auger motor mounting bracket 7 Remove the two spacers from the hopper drive board and discard board 8 Install spacers on new hopper drive board 9 Install new hopper drive board to the auger motor mounting bracket using two 78 32 screws Refer to Fig 22 and reconnect the wires to the hopper drive board terminals Connect three pin plug from the potentiometer to the hopper drive board J1 Refer to Fig 22 Install auger motor mounting bracket with auger motor and hopper drive board to the rear of the auger motor mounting panel using four 78 32 screws Install hopper support plate using four 8 32 screws 14 Install hopper assy 17 k 13 29112 101598 SERVICE cont HOPPER DRIVE BOARD FMD 1 ONLY cont RED from Hopper Motor J1 Connector for Three Pin Plug from Potentiometer BLK from Hopper Motor RED WHI from Main Harness WHI from Main Harness P1669 22 HOPPER DRIVE BOARD TE
32. automatically keeps track of the time since the dispenser was last run through arinse sequence If the dispenser detects that a rinse sequence has not been run for 8 hours the rinse L E D will flash continually If after an additional 4 hours 12 hours total a rinse sequence has still not been run the rinse L E D will light continuously and the hopper drives will be disabled until a rinse sequence has been run RUNNING A RINSE SEQUENCE 1 Place the rinse run switch in the rinse position 2 Sequentially or simultaneously at each of the two positions FMD 2 only dispense for at least 10 seconds 3 After the rinse L E D has extinguished the rinse timer is reset FMD 2 only 4 Return the rinse run switch to the run position DISPENSER USE 1 Simply place a cup on the drip tray beneath the dispensing tip 2 Press the button to froth and dispense the beverage 3 Release the button when the is approximately and allow the mixing chamber to drain NOTE The mixing chamber must drain at the end of each dispense 5 29112 101598 COLD BEVERAGE SET UP OPTIONAL FMD 2 ONLY 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 jumper plug from the main wiring harness and
33. eed to step 5 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring har ness 5 Reconnect the six pin connector of the wiring harness to J3 of the control board 29112 101598 SERVICE cont CONTROL BOARD FMD 2 ONLY CONT 6 Disconnect the four pin connector from J4 of the control board 7 Checkthe voltage across pins 1 amp 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 120 208 volt models three wire 120 240 volt models 8 Disconnect the dispenser from the power source If voltage is present as described proceed to step 9 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring har ness 9 Reconnect the four pin connector of the wiring harness to J4 of the control board Disconnect the ten pin connector from J2 of the control board 11 Carefully connect a piece of insulated jumper wire to pin 10 top right of J2 on the control board Keep the other end of this wire away from any metal surfaces of the dispenser Check the voltage across the terminals of the inlet solenoid valve with a voltmeter Connect the dis penser to the power source The indication must be 120 volts ac fortwo wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of ap
34. efer to Fig 15 when reconnecting wires 29112 101598 SERVICE cont DISPENSE SWITCH S 1 amp FMD 2 cont BLU WHI FMD 2 FIG 15 DISPENSE SWITCH TERMINALS FAN FMD 1 4 FMD 2 P1449 FIG 16 FAN Location The fan is located inside the dispenser hous ing on the right rear of the dispenser base plate Test Procedures 1 2 3 Disconnect the dispenser from the power source Disconnect the black and white wires from the fan terminals Check the voltage across the black and white wires on the main harness with a voltmeter Connect the dispenser to the power source The indication must be a 120 volts ac for two wire 120 volts models b 120 volts ac for three wire 120 208 volt or 120 240 volt models If voltage is present as described replace the fan If voltage is not present as described refer to wiring diagram and check the dispenser wiring harness Removal and Replacement Disconnect the vacuum hose from the fan Remove the two 78 32 locking screws securing the fan to the dispenser housing base plate Disconnect the wires from the fan terminals and discard the fan Refer to Fig 17 and connect the wires to the new fan Install new fan through the rear access hole and secure to the dispenser housing base plate using two 78 32 locking screws Reconnect the vacuum hose to the fan BLK
35. en minutes without a supply of water The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened This will help to avoid twists and kinks in the tubing Make certain that all plumbing connections are sealed and electrical connections tight and isolated This unit is heated at all times Keep away from combustibles WARNING Exercise extreme caution when servicing electrical equipment Unplug the dispenser when servicing except when electrical tests are specified Follow recommended service procedures Replace all protective shields or safety notices PROBLEM PROBABLE CAUSE REMEDY Product will not dispense 1 No water Water lines and valves to the dis penser must be open 2 No power or incorrect voltage to 1 Check for 120 volts across the the dispenser black and white wires on two wire 120 volt dispensers A2 Check for 120 volts across the red and white wires and the black and white wires 208 volts across the red and black wires on three wire 120 208 volt dispensers and 240 volts across the red and black wires on three wire 120 240 volt dispens ers B Check circuit breakers or fuses 3 Dispense Switch Refer to Service Dispense Switch for testing procedure See page 22 4 Dispense Solenoid Valve Referto Service Dispense Solenoid Valve for testing procedures See page 35 8 29112 101598 TROUBLESHOOTING cont PROBLEM Product will not dispense cont Water is not hot
36. ervice Control Board and Probe for testing procedures See page 20 Refer to Service Solenoid Valve Inlet for testing procedures See page 36 29112 101598 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 Rinse Run Switch FMD 1 Rinse Run Switch FMD 2 9 Rinse Timer FMD 2 REMEDY Refer to Service Dispense Switch for testing procedures See page 22 Remove the solenoid valve and clear any obstructions Rebuild or replace the valve if necessary See page 35 Place an empty container beneath the dispense tip Initiate a dispense cycle and check the water tempera ture immediately below the dispense tip with a thermometer Reading for mechanical thermostat models should be 180 F to 200 F see thermostat temperature settings decal in USER NOTICES on page 3 Refer to Service Whipper Motor for testing procedure See page 25 Refer to Service Frother Compo nents See page 25 Refer to Service Dispense Solenoid Valve for test procedures See page 35 Refer to Service Auger Drive Com ponents See page 13 See page 15 Refer to Service Auger Drive Com ponents See page 13 See
37. from Control Harness WHI from Control Harness ___ FIG 17 FAN TERMINALS 29112 101598 SERVICE cont FROTHER AND WHIPPER MOTOR FMD 1 shown amp FMD 2 3 Si Ro 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 Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the red and white wires FMD 1 amp FMD 2 left motor or orange and white wires FMD 2 right motor of the main harness from the black leads of the motor 3 Pressandholdthe dispense switch and check the voltage across the disconnected harness wires with a voltmeter Connect the dispenser to the power source The reading must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 208 volt or 120 240 volt models 25 4 Disconnectthe dispenser from the power source If voltage is present as described replace the motor If voltage is not present as described referto the wir ing diagrams and check the dispenser wiring harness 5 FIG 19 MIXING WHIPPER CHAMBER COMPONENTS 1 Steam Collector 8 Nut 2 Mixing Chamber 9 Slinger 3 Dispense Tip 10 Motor Assy 4
38. g such as reinforced braided polyethylene or silicone before the brewer will facilitate movement to clean the countertop Bunn O Matic does not recommend the use of a saddle valve to install the brewer The size and shape of the hole made in the supply line by this type of device may restrict water flow 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 Sanita tion Manual of the Food and Drug Administration FDA For models installed outside the U S A you must comply to the applicable Plumbing Sanitation Code for your area PLUMBING HOOK UP 1 Securely attach the short piece of tubing on the water strainer assembly to the inlet fitting on the bottom of the dispenser 2 Flush the water line and securely attach it to the flare fitting on the water strainer assembly 3 Turn on the water supply 4 29112 011906 INITIAL FILL amp HEAT CAUTION The dispenser must be disconnected from the power source 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 than five minutes 3 When the tank is full of water open the front door and place the heater switch in the lower position A tank full of cold water w
39. h the hole in the lower door panel 5 and releasing spring tabs 9 Connect the sockets leads to the door wiring harness Install door lower panel 5 with starter and starter socket on door assy 1 using four 78 32 screws LEVEL CONTROL BOARD AND LEVEL PROBE FMD 1 ONLY P1665 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 29112 101598 SERVICE cont LEVEL CONTROL BOARD AND LEVEL PROBE FMD 1 ONLY cont Test Procedure 1 Disconnect the dispenser from the power source 2 Removetheviolet wirefrom terminal 1 amp pink wire from terminal 4 of the circuit board 3 Check the voltage across terminals 2 amp 3 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 120 208 volt models three wire 120 240 volt models 4 Disconnectthe dispenser from the power source If voltage is present as described proceed to 75 If voltage is not present as described refer to the wiring diagram and checkthe dispenser wiring haness 5 Reconnect the violet wire to terminal 1 6 Carefully connect a piece of insulated jumper wire to terminal 4
40. ill take approximately forty minutes for the water to heat on 120 volt versions or twenty minutes for 120 208 volt versions and 120 240 volt versions During this waiting period complete these dispenser set up steps a Place the drip tray in front of the dispenser Set the drip tray cover in place b Placeasetofkeyholes in the cup locator plate over the screws beneath the hopper access door and push down gently c Fill the hopper with the dry product to be dispensed LIQUID LEVEL CONTROL The system automatically maintains the hot water tank s level by energizing the refill solenoid when the water level drops below the liquid level probe If the system for the FMD 2 only has not successfully refilled in 7 1 2 minutes a refill error occurs When a refill error occurs the refill solenoid is de energized and the rinse L E D will flash about once every 5 seconds Once the cause of the refill error has been investigated see the troubleshooting guide in the Operating and Service Manual and cured the system can be reset by disconnecting for at least 5 seconds and then reconnecting the power to the machine RINSE TIMER FMD 2 ONLY The dispenser is shipped from the factory with the rinse timer disabled To enable the rinse timer remove power from the dispenser remove the lower access panel and remove the jumper from J1 of the control board Replace the lower access panel and return power to the dispenser When enabled the rinse timer
41. inse switch to the whipper motor mounting panel 3 Remove switch with wires attached from the back side of the whipper motor mounting panel 4 Disconnect the wires from the switch and dis card the switch 5 Refer to Fig 33 when connecting the wires to the new switch 6 Install new switch with wires attached through the hole in the whipper motor mounting panel and secure with facenut WHI BRN to GRY to Control Main Harness _ Board J2 2 __ to Control Board J2 9 BLK from Main Harness WHI BRN to Main Harness YEL to Control Board J2 3 FIG 33 RINSE RUN SWITCH TERMINALS 29112 101598 SERVICE cont SOLENOID VALVE COLD WATER OPTIONAL FMD 2 ONLY Location The cold water solenoid valve is located on the left side of the dispenser base just behind the com ponent bracket Test Procedures 1 Disconnectthe dispenserfromthe power source 2 Disconnect the white and blue wires from the solenoid valve With the cold jumper plug in stalled press the left dispense switch on front of the door 3 Checkthevoltage across the white and blue wires 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 120 208 and 120 240 volt models 4 Disconnectthe dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to wiring diagram
42. ires 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 120 208 and 120 240 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to the wiring diagram and check dispenser wiring harness 5 Check for continuity across the solenoid valve coil terminals If continuity is present as described reconnect the white and violet wires to the solenoid If continuity is not present as described replace the solenoid valve 6 Check the solenoid valve for coil action Connect the dispensertothe power source Listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 29112 011906 SERVICE cont SOLENOID VALVE INLET FMD 1 amp FMD 2 cont T Disconnect the dispenser from the power source If the sound is heard as described and water will not pass through the solenoid valve there may be a blockage in the water line before the solenoid valve or the solenoid valve may require inspection for wear and removal of waterborne particles If the sound is not heard as described replace the solenoid valve Removal and Replacement 1 Remove the white and violet wires from the sole noid valve 2 Turn off the water supply to the dispenser 3 Disconnect the water lines to and from the sole n
43. k mounting bracket on the upper right side of the dispenser housing Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the black wire of the control thermo stat from the black lead from the limit thermostat 3 Remove bulb from the tank 4 Check the voltage across black wire on the control thermostat and the white or red wire on the tank heater with the tank heater switch in the ON lower position with a voltmeter Connect the dis penser to the power source The indication must be 29112 101598 SERVICE cont CONTROL THERMOSTAT FMD 1 amp FMD 2 cont a 120 volts ac for two wire 120 volt models b 208 volts acforthree 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 the tank If voltage is not present as described replace the thermostat Removal and Replacement 1 Remove the thermostat capillary bulb by firmly pulling up on the capillary at the tank lid This will disengage the grommet from the tank lid 2 Loosen the two 76 32 screws securing the ther mostat to the front tank mounting bracket Disconnect the wires from the thermostat 4 Remove thermostat and remove the screws and spacers from the thermostat Discard thermostat 6 Install two spacers and two 76 32 screws on the new thermo
44. nut 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 switch with wires attached through the hole in the front panel and secure with facenut RED from Main Wiring mane e A WHI RED to Main Harness P1456 FIG 31 RINSE RUN SWITCH TERMINALS RINSE RUN SWITCH FMD 2 FIG 32 RINSE RUN SWITCH Location The rinse run switch is located on the lower center of the whipper motor mounting panel Test Procedures 1 Disconnectthe dispenser from the power source 2 Check for continuity between the center left ter minal and left bottom terminal also between the center right terminal and the right bottom termi nal with the switch in the rinse position upper Check for continuity across the center left termi nal and the top left terminal also between center right terminal and the top right terminal with the switch in the run position lower Continuity must not be present when the switch is in the center position If continuity is present as described the switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Open the dispenser door 2 Remove the facenut securing the run r
45. oard and Level Probe FMD 1 30 Limit Thermostat e 32 Rinse Run Switch FMD 1 32 Rinse Run Switch 2 33 Solenoid Cold Water Optional FMD 2 Only 34 Solenoid DISPENSE 35 Solenoid 36 Tank 37 Tank Heater Switch ptas smith inset 38 Malstormier 39 Whipper MODI etiara tup tasto 26 Wiring Diagram E TS 40 41 AUGER DRIVE COMPONENTS FMD 1 6 p V SE FIG 1 AUGER DRIVE COMPONENTS Location The auger components are located inside the bottom part of the hopper except for the auger drive bracket spacer and retaing clip which are located on the outside rear of the hopper base The auger motor is located on the lower right rear of the motor mounting panel Refer to Fig 2 for disassembly and assembly Test Procedures Auger Motor 1 Disconnectthe dispenser from the power source 2 Disconnect the white red wire and the white wire from the hopper speed control board 3 Check the voltage across the white red wire and the white wire with a voltmeter With the rinse run switch in the run lower position connect the dispenser to the power supply The indica tion must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 20
46. of approximately 5 seconds 22 Disconnect the dispenser from the power source 1 N 1 2 2 If the voltage is present as described re install the probe The liquid level control circuitry is operating properly If the voltage is not present as described check the pink probe wire and green tank wire for continuity Hopper Motor Control Circuitry 1 Disconnect the dispenser from the power source 2 Disconnect the six pin connector from J3 of the control board 3 Checkthe voltage across pins 5 amp 6 of the six pin connector on the wiring harness with a voltmeter Connect the dispenser to the power source The indication must be 24 volts ac 4 Disconnectthe dispenser from the power source If voltage is present as described proceed to step 5 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring har ness 5 Reconnect the six pin connector of the wiring harness to J3 of the control board 6 Check that the rinse run switch is in the run position 29112 101598 SERVICE cont CONTROL BOARD FMD 2 ONLY CONT Check the voltage across the red terminal and the black terminal of the auger motor with a voltmeter Connect the dispenser to the power source Press and hold the appropriate dispense switch After a delay of about 6 seconds the indication must be between 4 0 and 24 5 volts dc If the voltage is present as
47. 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 BUNN O MATIC P N 27093 0000 27096 0000 FMD 1 ONLY E CONTROL THERMOSTAT ADJUSTMENT Td d CD Cd CO 200 F 190 F APPROXIMATE THERMOSTAT TEMPERATURE SETTINGS 28368 0001B 8 98 1998 BUNN O MATIC CORPORATION 180 F ee PUSH and HOLD BUTTON UNTIL CUP IS 2 3 FULL THEN RELEASE 28964 0000 28368 0001 PUSH and HOLD BUTTON UNTIL CUP IS 2 3 FULL THEN RELEASE 28964 0001 29112 011906 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 securely install the legs in the dispenser base ELECTRICAL REQUIREMENTS CAUTION The dispenser must be disconnected from the power source until specified in nitial Set Up The 120 volt version of this dispenser has an attached cordset and requires 2 wire grounded service rated 120 volts ac 15 am
48. oid valve 4 Remove the two 78 32 screws securing the sole noid to the rear of the dispenser housing Remove solenoid 5 Remove the two 78 32 U Type fasteners from the solenoid bracket 6 Install the two 78 32 U Type fasteners and the two 78 32 screws on the new solenoid 7 Install new solenoid on rear of dispenser housing and tighten the two screws 8 Securely fasten the water lines to and from the solenoid valve 9 Refer to Fig 39 and reconnect the wires WHI from Main Harness VIO from Main Harness P1217 FIG 39 INLET SOLENOID VALVE TERMINALS TANK HEATER FMD 1 shown amp FMD 2 FIG 40 TANK HEATER 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 Checkthe voltage across the black and white wires 120 volt models or blackand red wires for 120 208 volt models or 120 240 volt models with a voltme ter Connect the dispenser to the power source The indication must be 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 3 Disconnect the dispenser from the power source If voltage is present as described proceed to 74 If voltage is not present as described refer to the dispenser wiring diagram and check the wiring har ness
49. or operation improper maintenance or repair damage or casualty THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY WRITTEN OR ORAL EXPRESS OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE The agents dealers or employees of Bunn are not authorized to make modifications to this warranty or to make additional warranties that are binding on Bunn Accordingly statements by such individuals whether oral or written do not constitute warranties and should not be relied upon The Buyer shall give Bunn prompt notice of any claim to be made under this warranty by telephone at 217 529 6601 or by writing to Post Office Box 3227 Springfield Illinois 62708 3227 If requested by Bunn the Buyer shall ship the defective equipment prepaid to an authorized Bunn service location If Bunn determines in its sole discretion that the equipment does not conform to the warranty Bunn shall repair the equipment with no charge for parts during the warranty period and no charge for labor by a Bunn Authorized Service Representative during the warranty period If Bunn determines that repair is not feasible Bunn shall at its sole option replace the equipment or refund the purchase price for the equipment THE BUYER S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT WHETHER DERIVED FROM WARRANTY OR OTHERWISE SHALL BE LIMITED
50. p single phase 60 Hz The mating connector must be a NEMA 5 15R The 120 208 and the 120 240 versions of this dispenser has an attched cordset The mating connector must be a NEMA 14 20R Refer to the dispenser s dataplate for exact voltage requirement ELECTRICAL HOOK UP CAUTION Improper electrical installation will damage electronic components 1 Anelectrician must provide electrical service as specified 2 Using a voltmeter check the voltage and color coding of each conductor at the electrical source 3 Open the front door of the dispenser and place the heater switch the OFF upper position 4 Connect the dispenser to the power source 5 f plumbing is to be hooked up later be sure the dispenser is disconnected from the power source If plumbing has been hooked up the dispenser is ready for nitial Fill amp Heat PLUMBING REQUIREMENTS This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 90 psi 138 and 620 kPa from a or larger supply line A shut off valve should be installed in the line before the dispenser Install a regulator in the line when pressure is greater than 90 psi 620 kPa to reduce it to 50 psi 345 kPa The water inlet fitting is flare NOTE Bunn O Matic recommends 1 4 copper tubing for installations of less than 25 feet and for more than 25 feet from the water supply line At least 18 inches of an FDA approved flexible beverage tubin
51. page 15 Refer to Service Auger Drive Com ponents See page 13 See page 15 Refer to Service Rinse Run Switch for test procedures See page 31 See page 33 Refer to Operation Rinse Timer See Page 5 29112 101598 TROUBLESHOOTING CONT PROBLEM Dispenser is making unusual noises Excess dust Display not lit PROBABLE CAUSE 1 Plumbing Lines n2 Water Supply Tank Heater 1 Fan n2 A Hopper Drive Board FMD 1 B Control board FMD 2 Lamp n2 Lamp Holder Starter Lamp A Ballast REMEDY Plumbing lines should not be rest ing on the counter top A Thedispenser mustbe connected to a cold water line B Water pressure to the dispenser must not exceed 90 psi 620 kPa Install a regulator if necessary to lower the working pressure to ap proximately 50 psi 345 kPa Remove and clean lime off the tank heater See page 37 Refer to Service Fan for testing procedures See page 24 Referto Service Hopper Drive Board for testing procedures See page 27 Refer to Service Control Board for testing procedures See page 20 Referto Service Lamp see page 29 for lamp replacement Refer to Service Lamp Holder for testing procedures See page 29 Refer to Service Starter for testing procedures See page 30 Refer to Service Ballast for testing procedures See page 19 29112 051200 SERVICE This section provides procedure
52. pper speed control board 3 Check the voltage across the white red wire and the white wire with a voltmeter With the rinse run switch in the run lower position connect the dispenser to the power supply The indication must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 208 volt or 120 240 volt models 4 Disconnectthe dispenser from the power supply If voltage is present as described proceed to 75 If voltage is not present as described refer to the wir ing diagram and check the dispenser wiring harness 5 Check the voltage across the positive red wire 27 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 indication must be 4 0 to 24 5 volts dc If voltage is present as described the auger motor drive is operating properly If auger does not turn replace the auger motor If voltage is not present as described replace the hopper drive board Removal and Replacement Refer to Fig 2 1 Remove hopper assy 17 and set aside for reas sembly 2 Remove the four 78 32 screws securing the hop per support plate 12 remove plate and set aside for reassembly Remove the four 78 32 screws located inside the dispener housing on the lower right front of the auger motor mounting p
53. proximately 10 seconds Touch the free end of the jumper wire to the dispenser housing The indication must be 0 14 Movethe jumper wire away from the housing The indication must again be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of approximately 5 seconds Disconnect the dispenser from the power source and remove the jumper wire 10 12 13 15 If voltage is present as described proceed to step 16 If the voltage is not present as described replace the control circuit board 21 16 Reconnect the ten pin connector of the wiring harness to J2 of the control board Gently pull the liquid level probe out of the tank lid and inspect for corrosion Replace it if necessary Place the probe so that neither end is in contact with any metal surface of the dispenser Check the voltage across the terminals of the inlet solenoid valve with a voltmeter Connect the dis penser to the power source The indication must be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models aftera delay of approximately 10 seconds Move the probe s flat end to the dispenser hous ing The indication must be 0 Move the probe s flat end away from the housing The indication must again be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay
54. r 16 7 Remove the four 78 32 screws securing the auger motor to the auger motor mounting bracket 8 Remove auger motor and discard 9 Using four 8 32 screws install new auger motor 16 on mounting bracket 15 Install dust seal 17 on auger motor shaft Using four 8 32 locking screws install auger motor dust seal and mounting bracket to the rear of the auger motor mounting panel 14 Reconnect the wires to the terminals on the auger motor Install hopper support plate 19 and all hopper assemblies 20 14 Refer to Fig 7 when reconnecting wires 12 13 RED to WHI ORN from Control Board J3 2 BLK to GRN from Control Board J3 4 BLK to GRN from L Control Board J3 4 RED to WHI RED from Control Board J3 3 FIG 7 AUGER MOTOR TERMINALS BALLAST FMD 1 amp FMD 2 279 amp T RL lt m NN FIG 8 BALLAST 29112 101598 SERVICE cont BALLAST FMD 1 amp FMD 2 cont 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 Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the two black lead on the ballast from the main harness 3 Check for continuity between the two black leads on
55. ront COVer 2 Liftthe 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 Remove hopper lid 1 and empty product 4 Pull off the ejector elbow 13 5 Remove agitator disc assy 2 by pulling agitator support rod 4 towards agitator disc assy and lifting agitator disc assy from hopper 10 6 Remove auger 12 by pulling it out the front of the hopper 10 7 Remove auger drive shaft 5 by removing the retaining clip 6 from auger drive shaft 8 Slide washer 8 and auger drive shaft bracket 7 off of the auger drive shaft 5 9 Slide auger drive shaft 5 from auger drive shaft bushing 3 and remove from hopper 10 10 Remove locknut 9 from auger drive shaft bush ing 3 and remove auger drive shaft bushing from hopper 10 11 Wash components in a mild solution of dish de tergent using a bristle brush when needed 12 Rinse and dry each item thoroughly 13 Check for damaged or broken components re place any if necessary and reassemble hopper assy 14 Install hopper assy 20 in the dispenser by sliding hopper assy in the guides on the hopper support plate 19 until the slot in the bottom rear the hopper seats against the pin 18 in the hopper support plate 1516 171418 19 Agitator Disc Assy Auger Drive Shaft Agitator Support Rod Auger Drive Shaft Auger Drive Bracket B phu IS P1
56. roximately 5 seconds 15 Move the probe s flat end to the tank The indica tion must be 0 16 Move the probe s flat end away from the tank The indication should again be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three wire 120 240 volt models after a delay of approximately 5 seconds If voltage is present as described reinstall the probe the level control board and level probe are operating properly If voltage is not present as described check the pink probe wire for continuity Removal and Replacement 1 Remove all wires from the level control board 2 Removetwo 78 32 keps nuts holding level control board to right side of the component bracket 3 Remove level control board and spacers 4 Install the new level control board and spacers to the right side of the component bracket using two 8 32 keps nuts 5 Refer to Fig 27 when reconnecting the wires TI VIO to Inlet Solenoid Coil T2 BLK to Main Harness T3 WHI to Main Harness to Probe A 0 FIG 27 LEVEL BOARD TERMINALS 29112 101598 SERVICE cont LIMIT THERMOSTAT FMD 1 shown amp FMD 2 FIG 28 LIMIT THERMOSTAT Location The limit thermostat is located in the center of the tank lid Test Procedures 1 Disconnectthe dispenser from the power source 2 Disconnect both black wires from the
57. s for testing and replacing various major components used in this dispenser should service become necessary Re ferto 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 service personnel The dispenser should be unplugged when servicing except when electrical tests are required and the test procedure specifi cally states to plug in the dispenser COMPONENT ACCESS WARNING Disconnectthe dispenser from the power source before the removal of any panel or the replacement of any component All components are accessible by opening the door removal of the door panels dispenser top covers hopper s hopper support plate splash guard splash panel w drip tray lowerfront access panel and rear access cover Refer to the contents listing for component loca tion Contents Auger Drive Components FMD 1 13 Auger Drive Components FMD 2 15 ML c 18 Control Thermostat s sisien 19 Control Board FMD 2 20 Dispense SWIEGIIG se cn ptos tt quis imd ati Cobalt 22 roe 24 qj S 25 Hopper Drive Board FMD 1 27 Increase Decrease Switch 2 28 Lamp 29 Eum Rn 29 Lamp Starter and Socket 30 Level Control B
58. securingthe solenoid valveto the solenoid bracket 7 Using two 10 32 screws and lockwashers install new solenoid valve on solenoid mounting bracket 8 Install the solenoid valve and bracket on the dis penser base and tighten the two 78 32 screws 9 Securely fasten the water lines to and from the solenoid valve 10 Refer to Fig 35 when reconnecting the wires BLU to Main Harness WHI to Main Wiring Harness P1215 FIG 35 COLD WATER SOLENOID TERMINALS 29112 101598 SERVICE cont Test Procedures SOLENOID VALVE DISPENSE 1 amp FMD 2 1 Disconnectthe 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 white wires on the right solenoid or the tan and white wires on the left solenoid With the RINSE RUN switch in the RINSE upper position press the dispense switch on front of the door 3 Check the voltage across the red and white orange and white or tan and white wires 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 120 208 and 120 240 volt models 4 Disconnect the dispenser from the power source If voltage is present as described proceed to 5 If voltage is not present as described refer to wiring diagram and check dispenser wiring harness
59. stat 7 Position the thermostat on the botttom side of the front tank mounting bracket and tighten the two 76 32 screws 8 Slide the grommet to the line 4 5 above the bulb on the new capillary tube 9 Insert the capillary bulb through the hole in the tank lid and press the grommet firmly and evenly so thatthe groove in the grommet fits into the tank lid Carefully bend the capillary tube so that the tube and bulb inside the tank are in the vertical position and away from any electrical connections 11 Refer to Fig 11 and reconnect the wires NOTE The capillary tube must be clear of any electri cal termination and not kinked m 10 BLK from Limit Thermostat Heater Switch 11 THERMOSTAT TERMINALS 20 CONTROL BOARD FMD 2 ONLY FIG 12 CONTROL BOARD Location The Control Board is located behind the lower frontaccess cover mounted on the component bracket Test Procedure Liquid Level Control Circuitry 1 Disconnect the dispenser from the power source 2 Disconnect the six pin connector from J3 of the control board 3 Checkthe voltage across pins 5 amp 6 of the six pin connector on the wiring harness with a voltmeter Connect the dispenser to the power source The indication must be 24 volts ac 4 Disconnectthe dispenser from the power source If voltage is present as described proc
60. t 12 Slide the slinger 9 off of the motor shaft 13 Remove the two nuts 8 securing whipper cham ber receptacle 7 and whipper motor 10 to the front panel NOTE To remove the receptacle only rotate clockwise until the receptacle clears the nuts 8 and slide off of the motor shaft 14 Disconnect black leads on the motor 10 from the main wiring harness 15 Remove motor and discard 16 Install new motor 10 on rear of front panel and secure with two nuts 8 and connect black leads on the motor to the main wiring harness Refer to Fig 20 when reconnecting wires 17 Slide slinger 9 onto the motor shaft flush against the front panel 18 Wash remaining components mild solution of dish detergent using a bristle brush 19 Rinse thoroughly and allow to dry before reinstall ing in the dispenser 20 Slide whipper chamber receptacle w seal 7 and O ring 5 on to the motor shaft 21 Rotate the receptacle w seal 7 counterclockwise until it snaps into place on the motor mounting nuts 8 22 Push frother 6 onto the motor shaft making sure the flat in the frother 6 lines up with the flat on the motor shaft 23 Install whipper chamber 4 on the whipper cham ber receptacle 7 by twisting counterclockwise until the tabs on the whipper chamber 4 lock with the tabs on the whipper chamber receptacle 7 Be sure dispense port is pointing down 24 Install dispense tip 3 into the bottom of the
61. ts ac If voltage is present as described the transformer is operating properly If voltage is not present as described replace the transformer Removal and Replacement 1 Loosen the two 78 32 screws securing the com ponent bracket to the dispenser housing base 2 Pull component bracket out the front of the dis penser far enough so the transformer connector can be disconnected from the main wiring har ness 3 Disconnect the transformer four pin connector from the four pin plug on the main wiring harness 4 Remove the two 76 32 keps nuts securing the transformer to the rear of the component bracket 5 Remove and discard the transformer 6 Install new transformer on the rear of the compo nent bracket and secure with two 76 32 keps nuts 7 Connectthefour pin connector on the transformer to four pin plug on the main wiring harness 8 Place the component bracket into position and tighten the two 78 32 screws WHI GRN T7 WHI BLK T12 WHI 120V T2 240V T6 BLK TI FIG 45 TRANSFORMER TERMINALS 29112 101598 SCHEMATIC WIRING DIAGRAM FMD 1 GRN L1 CONTROL LIMIT THERMOSTAT THERMOSTAT RED 16 3 WIRE MODELS 1 HOPPER SPEED ADJUST LIQUID LEVEL BOARD RUN RINSE WITCH 47777710 ee 3 HOPPER DISPENSE DISPENSE SWITCH WHI BLK 120 VOLTS A 2 WIRE 120 208 240 VOLTS AC 3WIRE SINGLE PHASE BL
62. ure with ten 78 32 hex nuts Connect water inlet line to the tank lid Reconnect the black wires to limit thermostat the pink wire to the liquid level probe and the green wire to the tank Refer to the limit thermostat and the liquid level board and probe sections in this manual when reconnecting wires Referto Fig 41 when reconnecting the wires to the tank heater Tipo 10 11 14 13 14 BLK to Limit Thermostat WHI or RED to amp Main Harness FIG 41 TANK HEATER TERMINALS 38 TANK HEATER SWITCH FMD 1 shown amp FMD 2 42 TANK HEATER SWITCH Location The tank heater switch located inside the dis penser on the upper right of the front panel Test Procedure 1 Disconnect the dispenser from the power source 2 Disconnect the black wires from the main wiring harness 3 With the switch in the ON lower position check for continuity between the center and the upper terminal With the switch in the OFF upper posi tion no continuity should be present between center and upper terminals If continuity is present as described the tank heater ON OFF switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove the switch mounting nut on the front of the front panel 2 Remove switch with wires attached from the rear of the front
63. ut the front of the hopper base 9 On Early models remove auger drive shaft 13 by removing the retaining clip 6 from auger drive shaft On Late models remove the auger drive bracket 7 by unscrewing left hand threads from the auger shaft 13 Slide spacer 8 and auger drive shaft bracket 7 off of the auger drive shaft 13 Remove auger drive shaft 13 from hopper base 9 Wash components ina mild solution of dish deter gent using a bristle brush when needed Rinse and dry each item thoroughly Check for damaged or broken components re place any if necessary and reassemble hopper assembly Install hopper assy 17 in the dispenser by sliding hopperassy onthe hopper support plate 12 until the slot in the rear of the hopper base 9 seats against the pins 16 in the hopper support plate 12 60 69 18 192021 1667 FIG 2 AUGER DRIVE amp HOPPER DISASSEMBLY Hopper Lid Hopper Wiper Shaft Wiper Blade Wiper Drive Gear Retainer Clip Auger Drive Bracket Spacer Hopper Base 10 Washer 11 Retainer Clip Hopper Support Plate Auger Drive Shaft Auger Wire 15 16 17 18 Auger Motor Dust Seal Auger Motor Mount Ejector Elbow Hopper Locating Pins Hopper Assembly Auger Motor Bracket ing panel 29112 011906 SERVICE cont AUGER DRIVE COMPONENTS FMD 1 cont Auger Drive Motor Refer to Fig 2 1 Remove hopper assy 17 and

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