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Bunn FMD-1, Service & Repair Manual

The Bunn FMD-1 is a versatile commercial beverage dispenser designed to deliver a wide range of hot drinks with precision and ease. Its sleek design and user-friendly interface make it perfect for various settings. Unlock its full potential by accessing the detailed specifications and user manual for free download at manualshive.com.

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71

GRN

GRY

WHI/GRY

BRN/BLK

BRN/BLK

BLK

I

N

C

D

E

C

INCREASE/

DECREASE

SWITCH

RINSE/PROGRAM/

RUN SWITCH

RUN

RUN

PGM

PGM

RINSE

RINSE

WHI/VI

O

RED/BL

K

GR

N

GRN

GRN

GRN

GRY

PNK

WHI/ORN

WHI/ORN

WHI/RED

WHI/RED

WHI/GRY

WHI/VIO

GRY

WHI/GRY

WHI/VIO

WHI/VIO

WHI

VIO

WHI

WHI/BLK

WHI/GRN

WHI/BLK

WHI/BLK

WHI/RED

WHI/GRN

WHI/BLK

BRN/WHI

RED/BLK

RED/BLK

BLU/BLK

WHI/YEL

WHI/YEL

TAN

J2-5

J3-5

J3-1

J4-4

J4-1

J1-4

J1-1

J2-1

J2-10

C

O

N

T

R

O

L

 

C

I

R

C

U

I

T

 

B

O

A

R

D

 

#

2

WHI/ORN

WHI/BLU

WHI/BLU

GRN

BLK

RED

RED

SCHEMATIC WIRING DIAGRAM FMD-5A

GRN

L1

BLK-16

BLK

BLK

BLK-16

BLK-16

BLK-16

BLK

WHI

WHI

WHI

WHI

WHI

WHI

TANK HEATER

SWITCH

CONTROL

THERMOSTAT

LIMIT

THERMOSTAT

L2

M

FAN

SOL

REFILL VALVE

VIO

OVERFLOW PROTECTION SWITCH

RED

RED

WHI/VIO

GRY

PNK

"RINSE" #1-3 L.E.D.

1

1

1

6

1

6

1

4

RED/WHI

BLU/WHI

TA

N

GR

N

GRY

PNK

"RINSE" #4 & 5 L.E.D.

1

RED/GRN

ORN/RED

BLU/BLK

GR

N

WHI/RED

WHI/BLK

WHI/RED

WHI/RED

WHI/RED

GRN/BLK

GRN/WHI

BLU/BLK

BLU

BLK/WHI

RED/BLK

RED

ORN/BLK

ORN

BLK

BLK

BLK

BLK

WHI/RED

BLK

WHI/BL

K

BLU/BLK

RED/BL

K

ORN/BLK

RE

D

OR

N

GRN/WHI

GRN/BL

K

BL

U

BL

K

WHI/RE

D

WHI/BL

K

BLK/WH

I

RE

D

RE

D

RE

D

OR

N

YE

L

BL

U

BRN/BLK

BR

N

WHI/RE

D

WHI/OR

N

WHI/YEL WHI/BLU GR

N

WH

I

BL

K

WH

I

WH

I

BL

U

WH

I

BL

K

BL

K

BL

K

BLK/RED

WH

I

BLU/RED

BLK/RE

D

RE

D

BL

U

BL

U

RE

D

RE

D

RE

D

RE

D

RE

D

RE

D

RE

D

BL

U

WH

IW

HI

GR

N

BLU/RED

BL

K

BL

K

BL

K

WH

I

BL

K

ST

AR

TER

ST

AR

TER

LAMP #1

BALLAST

LAMP #2

BALLAST

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BRN/BLK

HOPPER #4

HOPPER #5

M

M

M

SOL

M

SOL

M

SOL

M

SOL

M

SOL

STATION #1

WHIPPER

STATION #2

WHIPPER

STATION #3

WHIPPER

STATION #4

WHIPPER

STATION #5

WHIPPER

STATION #1

DISPENSE

VALVE

STATION #2

DISPENSE

VALVE

STATION #3

DISPENSE

VALVE

STATION #4

DISPENSE

VALVE

STATION #5

DISPENSE

VALVE

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BLK

BRN

BRN

TAN

WHI

RED

RED

RED

RED
RED

34820.0002B   04/05    ©2005  BUNN-O-MATIC CORPORATION

TAN

HOT

SOL

COLD

WHI

WHI/YEL

1

4

COLD DRINK OPTION (LEFT ONLY)

HOT/COLD SWITCH

BR

N

TAN

WHI

WHI

ORN

WHI

WH

I

WH

I

WH

I

OR

N

YEL

WHI

BLU

WH

I

BL

U

WHI

WH

I

WH

I

WH

I

WH

I

WH

I

WH

I

WH

I

YE

L

RED

RE

D

OR

N

BL

U

YE

L

RE

D

JUMPER PLUG MUST BE

USED WHEN COLD

DRINK FEATURE NOT

INSTALLED

RED

RED

WHI/YEL

WHI/BLU

GR

N

GR

N

GR

N

BLK

BLK

BLK

RED

RED

RED

HOPPER #1

HOPPER #2

HOPPER #3

M

M

M

BRN/WHI

WHI/RED

WHI/ORN

GR

N

BLK

GR

N

230 VOLTS AC

2 WIRE + GND

SINGLE PHASE, 50/60HZ

1

2

3

4

5

240V : 24V AC

TRANSFORMER

WHI/BLK

WHI/GRN

BLK

WHI

LOAD

LINE

K

K

BLK-16

TANK HEATER

WHI-16

THERMAL

FUSE

THERMAL

FUSE

PROBE

J2-5

J3-5

J3-1

J4-4

J4-1

J2-1

J2-10

C

O

N

T

R

O

L

 

C

I

R

C

U

I

T

 

B

O

A

R

D

 

#

1

J1-4

J1-1

42672 122209

Summary of Contents for FMD-1

Page 1: ...REPAIR MANUAL BUNN O MATIC CORPORATION POST OFFICE BOX 3227 SPRINGFIELD ILLINOIS 62708 3227 PHONE 217 529 6601 FAX 217 529 6644 42672 0000B 06 12 2009 Bunn O Matic Corporation FMD Series Including FMD 1 2 3 4 5 ...

Page 2: ... 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 If BUNN determines in its sole discretion that the equipment does not conform to the warranty BUNN at its exclusive op tion while the equipment is under warranty shall either 1 pr...

Page 3: ...atics 42 SITE PREPARATION A minimal clearance is required between the dispenser sides and the wall or another appliances Leave some space so the dispenser can be moved for cleaning INTRODUCTION Safety first To avoid electrical shock unplug dispenser from power source before servicing inside Basic Maintenance In order to maintain proper machine operation a Preventative Maintenance schedule must be ...

Page 4: ...a deberá realizarse diariamente 1 x 7d 1 2 3 4 5 a Wash b Rinse c Sanitize d Dry a Lave b Enjuague c Desinfecte d Seque 7 8 6 a b c 9 7 Replace Light Bulbs as required 1 Para limpiar las camaras de mezcla coloque el interruptor en la posicón ENJUAGUE MARCHA RINSE RUN y pulse el boton para espumar y distribuir la bebida DISPENSE 2 Gire el codo hacia arriba remueva las tolvas llene las tolvas con pr...

Page 5: ...tems indented below 25732 0000 Steam Collector 25733 0000 Mixing Chamber 25734 0000 Whipper Chamber 25736 0000 Dispense Tip 24733 0010 O ring 25902 0000 Frother 26356 0000 Shaft Seal 28866 0000 Receptacle 25903 0000 Elbow 29128 0000 Whipper Motor Seal Kit Includes items indented below 24733 0010 O ring 28867 0000 Slinger 26356 0000 Shaft Seal Check and or replace every 3 months or as required 2635...

Page 6: ...nches 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 excep...

Page 7: ...ol Thermostat 3 Tank Heater REMEDY RefertoService LevelControlBoard and Probe for testing procedures See page 41 Refer to Service Control Board and Probe for testing procedures See page 20 Refer to Service Overflow Protec tion Switch See page 44 Refer to Service Auger Drive See page 14 A Direction of flow arrow must be pointing towards dispenser B Removethestrainerandcheckfor obstructions Clear or...

Page 8: ...can initiate cor rosive reactions resulting in serious leaks 2 Dispense Solenoid Valve 1 Control Board 2 Solenoid Valve Inlet REMEDY RefertoService TankHeaterSwitch for testing procedures See page 52 Refer to Service Heater Relay for testing procedures See page 51 Refer to Service Control Board for testing procedures See page 20 Inspect the tank assembly for ex cessive lime deposits Delime as requ...

Page 9: ...neaththe dispensetip Initiateadispensecycle and check the water temperature immediately below the dispense tip with a thermometer see thermostat temperature settings decal Refer to Service Whipper Motor for testing procedure See page 34 Refer to Service Frother Compo nents See page 33 Refer to Service Dispense Solenoid for test procedures See page 47 Refer to Service Auger Drive Com ponents See pa...

Page 10: ...sting on the counter top A Thedispensermustbeconnected 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 50 Refer to Service Fan for testing procedures See page 32 Refer to Service Hopper Drive Board for testing proce...

Page 11: ...11 NOTES 42672 122209 ...

Page 12: ... 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 lower front access panel and rear ac cess cover Refer to the contents listing for component location INDEX Access Panels 13 Auger Drive Components 14 Auxillary Control Board FMD DBC 3 17 Ballast 19 Control Board Main 20 23 Control Thermostat 26 Dispens...

Page 13: ...whole FMD family FMD 5 shown Before removing panels make sure power is OFF to the machine and water is disconnected accept where indicated in testing procedures Retain all screws and other attaching hardware for re assembly FIG 1 ACCESS PANELS PLACE CUP HERE FMD 5 shown 42672 122209 ...

Page 14: ... 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 Ifvoltageispresentasdescribed theaugermotordrive is operating properly If auger does not turn replace the auger motor If voltage is not present as described check the auger hopper drive board Removal Cleaning and Replacement Hopper Auge...

Page 15: ...lower right front of the auger motor mounting panel 19 securing auger motor mounting bracket 16 and auger motor 17 to the rear of the auger motor mounting panel 19 4 Disconnect the wires from the hopper drive board 5 Removeaugermotormountingbracket 16 auger motor 17 and dust seal 18 as an assembly 6 Remove dust seal 18 from auger motor 17 7 Disconnect the wires from the auger motor 17 8 Remove the...

Page 16: ... 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 fro...

Page 17: ...odels 5 Disconnect the dispenser from the power source If voltage is present as described proceed to step 6 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring harness 6 Check the voltage across the terminals of the hot water dispense solenoid with a voltmeter Connect the dispenser to the power source Press the hot water dispense switch The indication ...

Page 18: ...nd pin 6 of the six pin J2 connector of the wiring har ness Connect the dispenser to the power source The indication must be a 120 volts ac for two wire 120 volt models b 120 volts ac for three wire 120 208 or 120 240 volt models c 240 volts ac for two wire 240 volt models d 230 volts ac for two wire 230 volt models 8 Disconnect the dispenser from the power source If voltage is present as describe...

Page 19: ...arness P1447 FIG 9 BALLAST TERMINALS Removal and Replacement 1 Loosen the three 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 each ballast can be disconnected from the main wiring harness and the door interconnect harness 3 Removethetwo 8 32screwssecuringeachballast to the rear of the co...

Page 20: ...voltage is present as described proceed to step 6 Ifvoltageisnotpresentasdescribed refertothewiring diagram and check the dispenser wiring harness back to the power cord Liquid Level Control Circuitry 6 Carefully connect a piece of insulated jumper wire to pin 3 third from left on top row of J1 on the control board Keep the other end of this wire away from any metal surfaces of the dispenser 7 Wit...

Page 21: ...he Run position 5 With a voltmeter check the voltage across the red terminal and the black terminal of the auger motor Connect the dispenser to the power source Press 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 described the hopper motor control circuitry is operating properly If the voltage is n...

Page 22: ...ribed replace the control circuit board Removal and Replacement 1 Disconnect the three plugs on the main wiring har ness from the connectors on the control board 2 Remove the four 6 32 keps nuts securing the control board to the component bracket 3 Remove control board and discard 4 Installnewcontrolboardonthecomponentbracket using four 6 32 keps nuts 5 Reconnect the three plugs on the main harnes...

Page 23: ... out of the tank lid and inspect for corrosion Replace it if necessary 12 Place the probe so that neither end is in contact with any metal surface of the dispenser 13 Check the voltage across the terminals of the inlet solenoid valve with a voltmeter Connect the dispenser to the power source The indication must again be 120 volts ac for two wire 120 volt models three wire 120 208 volt models three...

Page 24: ... If the voltage is present as described the hopper motor control circuitry is operating properly If the voltage is not present as described replace the control circuit board Tank Heater Relay Control Circuitry Control Board 2 120V dispensers only 1 Disconnect the dispenser from the power source 2 Back probe check the voltage across pins 5 6 of the six pin J3 connector on the wiring harness with a ...

Page 25: ...wiring har ness from the connectors on the control board 2 Remove the four 6 32 keps nuts securing the control board to the component bracket 3 Remove control board and discard 4 Installnewcontrolboardonthecomponentbracket using four 6 32 keps nuts 5 Reconnect the three plugs on the main harness to the connectors on the control board NOTE J4 is not connected on Control Board 2 on 120 208 240V disp...

Page 26: ...be from the tank 4 Withavoltmeter checkthevoltageacrosstheblack wirefromthecontrolthermostatandthewhite wire on the tank heater with the tank heater switch in the ON lower position Connect the dispenser to the power source The indication must be120 volts ac for two wire 120 volt models Ifvoltageispresentasdescribedthecontrolthermostat is operating properly Reinstall temperature probe into the tank...

Page 27: ... Thermostat BLK from Tank Heater Switch SERVICE cont CONTROL THERMOSTAT cont MECHANICAL THERMOSTAT TAN to WHI BRN in Main Wiring Harness BLK to Main Wiring Harness WHI to Main Wiring Harness BLK to Main Wiring Harness ELECTRONIC THERMOSTAT 42672 122209 ...

Page 28: ...pense switch from the door interconnect wiring harness 7 Reinstall the door bottom cover using six 8 32 screws 8 Refer to schematic wiring diagrams when recon necting the wires FIG 16 DISPENSE SWITCHES P2636 Location The dispense switches are located on the lower outside of the dispenser door Test Procedure 1 Disconnect the dispenser from the power source 2 Open the dispenser door and remove the b...

Page 29: ...s described the membrane switch assembly is operating properly If continuity is not present as described replace the membrane switch assembly P1631 Location The digital touch control switch is located on the lower outside of the dispenser door Test Procedure 1 Disconnect the dispenser from the power source 2 Open dispenser door and remove the bottom door cover 3 Disconnect the wires from the door ...

Page 30: ...ect wiring har ness 4 From inside the door gently push the switch away from the door and discard 5 Remove the paper from the adhesive backing on the switch and feed the ribbon cable on the back of switch through the slot in the door 6 Firmly press the new switch into the opening on the door to hold the switch in the door 7 Reconnect the wires to the dispense switch from door interconnect wiring ha...

Page 31: ...ds on the EMI Filter If resistance is present as described the EMI Filter is operating properly If resistance is not present as described replace the EMI Filter Removal and Replacement 1 Disconnect the wires from the EMI Filter 2 Remove the two 8 32 screws and nuts securing the EMI Filter 3 Remove and discard EMI Filter 4 Install new EMI Filter using two 8 32 screws and nuts to secure EMI Filter t...

Page 32: ...volt models c 230 volts ac for two wire 230 volt models If voltage is present as described replace the fan If voltage is not present as described refer to Wiring Diagrams and check the dispenser wiring harness SERVICE cont Removal and Replacement 1 Disconnect the vacuum hose from the fan 2 Remove the two 8 32 locking screws securing the fan to the dispenser housing base plate 3 Disconnect the wire...

Page 33: ...lt models b 240 volts ac for two wire 240 volt models c 230 volts ac for two wire 230 volt models 5 Disconnect the dispenser from the power source If voltage is present as described replace the motor If voltage is not present as described refer to the Wiring Diagrams and check the dispenser wiring harness 9 8 7 6 5 4 3 10 FIG 25 MIXING WHIPPER CHAMBER COMPONENTS P1630 35 1 Steam Collector 2 Mixing...

Page 34: ...ng in the dispenser 17 Slidewhipperchamberreceptaclewithseal 8 and o ring 5 on to the motor shaft 18 Rotatethereceptaclewithseal 8 counterclockwise untilitsnapsintoplaceonthemotormountingnuts 7 19 Push frother 6 onto the motor shaft making sure the flat in the frother 6 lines up with the flat on the motor shaft 20 Installwhipperchamber 4 onthewhipperchamber receptacle 8 by twisting counterclockwis...

Page 35: ...t or 120 240 volt models c 230 volts ac for two wire 230 volt models 4 Disconnect the dispenser from the power supply P1665 If voltage is present as described proceed to 5 If voltage is not present as described refer to the wiring diagram and check the dispenser wiring harness 5 Check the voltage across the positive red wire terminal and the negative black wire terminal on the auger motor with a v...

Page 36: ...n the hopper drive board and disconnect the three pin plug J1 from the hopper drive board 5 Removeaugermotormountingbracket 18 auger motor 19 dust seal 20 and hopper drive board as an assembly 6 Remove the two 8 32 screws securing the hopper 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 b...

Page 37: ...resent as described the hot cold switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Remove all wires from the switch terminals 2 Remove the mounting nut on the front of the whip per motor mounting panel 3 Remove the hot cold switch from the rear of the front panel and discard 4 Reconnect the wires to the terminals on the rear of the ...

Page 38: ... 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 Removethefacenutsecuringtheincrease decrease 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...

Page 39: ...ess as an assem bly 6 Disconnect the wires from the lamp holder to be replaced from the door wiring harness 7 Rotate lamp 3 90 and remove from lamp holders 2 8 Remove the 6 32 screw securing the lamp holder 2 to be removed remove lamp holder 2 and discard 9 Install new lamp holder 2 and secure with a 6 32 screw 10 Connect the wires on the new lamp holder to the door wiring harness black wire to re...

Page 40: ... 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 33 1 Open dispenser door assy 1 2 Remove the five 6 32 screws securing the door lower panel 5 to the door assy 1 3 Disconnect the leads on the starter socket from the door wiring harness 4 Remove lower door panel 5 and starter w socket 6 as assembly...

Page 41: ...y connect a piece of insulated jumper wire to terminal 4 Keep the other end of this wire away from any metal surface of the dispenser 7 Check the voltage across terminals 1 3 with a voltmeter Connect the dispenser to the power source 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 c 230 volts ac for two wire 230 v...

Page 42: ...on should again 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 c 230 volts ac for two wire 230 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...

Page 43: ...rmostat terminals SERVICE cont Ifcontinuityispresentasdescribed thelimitthermostat 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 termi nals 2 Carefully slide the limit thermostat out from under the retaining clip and remove the limit thermo stat 3 Carefully slide the new limit thermo...

Page 44: ...cribed reconnect the red wires to the black wire and the blue wire from the main harness If continuity is not present as described replace the overflow protection switch Removal and Replacement 1 Disconnect the red leads from the overflow protec tion switch from the black wire and the blue wire from the main harness 2 Remove the nut beneath the copper overflow cup 3 Remove the entire switch assemb...

Page 45: ...s the center left terminal 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 RINSE RUN switch is operating properly If continuity is not present as described replace the switch Removal and Replacement 1 Op...

Page 46: ...ser to the power source With HOT COLD switch in the COLD upper position press the left dispense switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 8 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 ...

Page 47: ...lace the solenoid valve 6 Check the solenoid valve for coil action Connect the dispenser to the power source With RUN RINSE switch in the RINSE upper position press the appropriate dispense switch and listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil magnet attracts 7 Disconnect the dispenser from the power source If the sound is heard as described and water w...

Page 48: ...nser to the power source Listen carefully in the vicinity of the solenoid valve for a clicking sound as the coil 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 o...

Page 49: ...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 Remove the two wires from the solenoid valve 2 Turn off the water supply to ...

Page 50: ...nt 1 Shut off water supply to the dispenser 2 Disconnect the water supply tube on the tank lid 3 Disconnect the black wires on the limit thermostat FIG 51 TANK HEATER TERMINALS P1218 WHI or RED to Main Wiring Harness BLK to Limit Thermostat FMD DBC 3 shown 4 Disconnecttheblackwireandthewhiteorredwirefrom the tank heater terminals 5 Disconnect the pink wire from the liquid level probe 6 Disconnect ...

Page 51: ...m ponent bracket to the dispenser housing base 2 Pull component bracket out the front of the dis penser far enough so the tank heater relay can be disconnected from the main wiring harness 3 Disconnect the tank heater relay from the main wiring harness 4 Remove the two 8 32 screws securing the tank heater relay to the rear of the component bracket 5 Remove and discard the tank heater relay 6 Insta...

Page 52: ... as described the heater ON OFF switch is operating properly If continuity is not present as described replace the switch FIG 55 TANK HEATER SWITCH TERMINALS P1219 Removal and Replacement 1 Refer to the hopper section in this manual and remove the hopper assemblies and the hopper support plate 2 Remove the switch mounting nut on the front of the front panel 3 Remove switch with wires attached from...

Page 53: ...tothewiring 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 volts 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 8...

Page 54: ...Number 38739 0000 Bunn Part Number 38739 0001 MOV1 MOV1 TRIAC MAPS for FMD Q1 MOV1 controls Refill Valve J4 Q1 MOV1 controls Left Whipper Motor J2 6 Q2 MOV3 controls Center Whipper Motor J2 3 Q5 MOV4 controls Right Whipper Motor J2 1 Q7 MOV2 controls Refill Valve J2 5 42672 122209 ...

Page 55: ...MOSTAT BLK 16 TANK HEATER RED 16 3 WIRE MODELS WHI 16 2 WIRE MODELS BLK 16 SOL TANK INLET BLK BLK BLK PROBE 1 4 3 2 LIQUID LEVEL BOARD VIO WHI WHI WHI PNK FAN HEATER SWITCH CONTROL THERMOSTAT BLK 16 HOPPER DRIVE PCB WHI WHI BLK BLK WHI RED BLU STARTER BLK BLK BLU BLU BLU BLU BLU RED RED BLK BLK WHI WHI WHI WHI DISPENSE SWITCH 1 4 1 BLK J1 1 2 3 WHI RED FLUORESCENT LAMP BALLAST BLK BLK BLK BLK BLK ...

Page 56: ...OSTAT BLK 16 SOL TANK INLET BLK BLK BLK PROBE 1 4 3 2 LIQUID LEVEL BOARD VIO WHI WHI WHI PNK FAN HEATER SWITCH CONTROL THERMOSTAT BLK 16 HOPPER DRIVE PCB WHI WHI BLK BLK WHI RED BLU STARTER BLK BLK BLU BLU BLU BLU BLU RED RED BLK BLK WHI WHI WHI WHI DISPENSE SWITCH 1 4 1 BLK J1 1 2 3 WHI RED FLUORESCENT LAMP BALLAST BLK BLK BLK BLK BLK BLK RED RED RED CHASSIS DOOR GRN HOPPER SPEED ADJUST BLK 16 TA...

Page 57: ...RED RED WHI 1 4 4 1 1 1 1 4 CONTROL THERMOSTAT WHI WHI J4 1 J2 10 J4 4 J3 1 J3 6 J2 1 J2 5 GRN PROBE PNK C O N T R O L P C B O A R D VIO VIO GRN GRN GRN GRN GRN GRN GRN GRN WHI ORN WHI ORN WHI RED WHI RED WHI BLK WHI GRN BRN BLK BRN BLK RED BLK RED BLK GRY YEL WHI YEL WHI RED WHI ORN ORN ORN ORN TAN TAN WHI FLUORESCENT LAMP BALLAST BLK BLK BLK BLU 1 GRN BLK WHI BLK GRY PNK RINSE L E D 4 1 120V 24V...

Page 58: ...TAT WHI WHI J4 1 J2 10 J4 4 J3 1 J3 6 J2 1 J2 5 GRN PROBE PNK C O N T R O L P C B O A R D VIO VIO GRN GRN GRN GRN GRN GRN GRN GRN WHI ORN WHI ORN WHI RED WHI RED WHI BLK WHI GRN BRN BLK BRN BLK RED BLK RED BLK GRY YEL WHI YEL WHI RED WHI ORN ORN ORN ORN TAN TAN WHI FLUORESCENT LAMP BALLAST BLK BLK BLK BLU 1 GRN BLK WHI BLK GRY PNK RINSE L E D 4 1 240V 24V AC TRANSFORMER WHI BLK WHI BLK WHI BLK WHI...

Page 59: ...G L G M D M D S M S M STOP LEFT CENTER SWITCH UNIT ASSY WHI WHI BLK BLK BLK BLK RED RED BLU BLU BLU WHI BLU WHI BLU 1 1 STARTER BLK BLK BLK FLUORESCENT LAMP BALLAST GRN GRN RED BLK BRN BLK DOOR CHASSIS 1 1 1 4 4 4 WHI RED WHI ORN WHI BLU GRY RED ORN GRN BLK RED WHI GRN 29096 0003B 05 02 2002 BUNN O MATIC CORPORATION RIGHT HOPPER LEFT HOPPER 42672 122209 ...

Page 60: ...GRN GRN GRN GRN GRN GRN GRN WHI GRY WHI GRY WHI ORN WHI ORN WHI RED WHI RED WHI BLK WHI GRN BRN BLK BRN BLK RED BLK RED BLK GRY YEL WHI YEL WHI RED WHI ORN ORN FLUORESCENT LAMP BALLAST BLK BLK BLK BLU 1 GRN BLK WHI BLK GRY PNK RINSE L E D 4 1 120V 24V AC TRANSFORMER WHI BLK WHI BLK WHI GRN WHI GRN INCREASE DECREASE SWITCH I N C D E C RINSE RUN SWITCH RUN RINSE GRY YEL BRN WHI BRN WHI WHI VIO ORN W...

Page 61: ...61 42672 122209 ...

Page 62: ...62 42672 122209 ...

Page 63: ...63 42672 122209 ...

Page 64: ...64 42672 122209 ...

Page 65: ...DELS GREEN L1 L2 BLK N MAIN ON OFF SWITCH Late 3 wire Models only RED WHI SCHEMATIC WIRING DIAGRAM FMD DBC 3 WITH HOT WATER DISPENSE 120 VOLTS AC 2 WIRE GND or 120 208 240 VOLTS AC 3 WIRE GND SINGLE PHASE 60 Hz 29218 0002D 03 07 1999 BUNN O MATIC CORPORATION 42672 122209 ...

Page 66: ... CHASSIS COLD DRINK OPTION LEFT ONLY SOL SOL SOL LEFT CENTER RIGHT READY HOT WATER STOP S M M D L G S M M D L G S M M D L G AUX CONTROL PC BOARD SWITCH UNIT ASSY RIGHT DISPENSE 120V 24V AC TRANSFORMER PROBE CONTROL THERMOSTAT LIMIT THERMOSTAT TANK HEATER OVERFLOW SWITCH FAN TANK INLET TANK HEATER SWITCH LEFT DISPENSE CENTER DISPENSE RIGHT WHIPPER LEFT WHIPPER CENTER WHIPPER RIGHT HOPPER HOT WATER ...

Page 67: ...67 42672 122209 ...

Page 68: ...68 42672 122209 ...

Page 69: ...69 42672 122209 ...

Page 70: ...70 42672 122209 ...

Page 71: ... WHI YEL WHI BLU GRN WHI BLK WHI WHI BLU WHI BLK BLK BLK BLK RED WHI BLU RED BLK RED RED BLU BLU RED RED RED RED RED RED RED BLU WHI WHI GRN BLU RED BLK BLK BLK WHI BLK STARTER STARTER LAMP 1 BALLAST LAMP 2 BALLAST BLK BLK BLK BLK BLK BLK BLK BLK BRN BLK HOPPER 4 HOPPER 5 M M M SOL M SOL M SOL M SOL M SOL STATION 1 WHIPPER STATION 2 WHIPPER STATION 3 WHIPPER STATION 4 WHIPPER STATION 5 WHIPPER STA...

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