Bunn FMD-3 service manual Component Access, Contents, Auger Drive Components

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SERVICE

This section provides procedures for testing and replacing various major components used in this dispenser should service become necessary. Refer to Troubleshooting for assistance in determining the cause of any problem.

WARNING - Inspection, testing, and repair of electri- cal equipment should be performed only by qualified service personnel. The dispenser should be un- plugged when servicing, except when electrical tests are required and the test procedure specifically states to plug-in the dispenser.

COMPONENT ACCESS

WARNING - Disconnect the dispenser from the power source before the removal of any panel or the replace- ment of any component.

All components are accessible by opening the door, removal of the door panels, dispenser top cov- ers, hoppers, hopper support plate, splash guard,splash panel w/drip tray, lower front access panel, side and rear access covers.

Contents

 

Auger Drive Components

12

Auger Motor

14

Ballast

15

Control Thermostat

16

Dispense Switch

17

Fan

18

Frother

19

Hopper Delay Board

21

Hot/Cold Switch

22

Lamp Holder

23

Lamp

23

Lamp Starter and Socket

24

Level Control Board and Level Probe

24

Limit Thermostat

26

Overflow Protection Switch

27

Rinse/Run Switch

28

Solenoid (Cold Drink - Optional)

29

Solenoid (Dispense)

30

Solenoid (Inlet)

31

Tank Heater

32

Tank Heater Switch

33

Whipper Motor

19

Wiring Diagrams

35 & 36

AUGER DRIVE COMPONENTS

P1445.40

FIG. 1 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. 2 for disassembly and assembly.

Test Procedures - Auger motors

1.Disconnect the dispenser from the power source.

2.Disconnect the wires from the motor to be tested.

3.Check the voltage across the white/violet wire for the right motor, orange wire for the center motor or the red wire for the left motor and the gray wire with a voltmeter. With the rinse/run switch in the run position press and hold the appropriate dis- pense switch. Connect the dispenser to the power supply. After a .7 second delay 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)240 volts ac for two wire 240 volt models.

12

28364 011598

 

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty FMD-2 FMD-300656.0000 00831.0000 28368.000026536.0002 FMD-2Initial SET-UP Initial Fill & Heat Plumbing HOOK-UPDraining the HOT Water Tank Problem Probable Cause RemedyTroubleshooting Replacement Control thermostatStat for testing procedures. See Product overflows container Dispense switch Dripping from dispense tip Lime build-upLeaks ColdProblem Probable Cause RemedyRefer to Service Lamp, see page 23 for lamp replacement Dispenser is making unusualNoises Water Supply Tank Heater Excess dust Fan Display not lit Lamp Lamp Holder Starter Lamp BallastComponent Access ContentsAuger Drive Components Hopper Lid Auger Wire Agitator Disc Assy If voltage is present as described, proceed to #5Off of the auger drive shaft Auger Drive Shaft Optional Bushing Ejector ElbowAuger Drive Components Remove dust seal 18 from auger motorRefer to when reconnecting the wires BallastHarness BLK to BLU From Door Interconnect Remove temperature probe from the tank Control ThermostatDispense Switch Control ThermostatLocation Dispense Switch FANLocation FAN Frother and Whipper MotorSteam Collector Ring Mixing Chamber #8-32 Acorn Nut Washer Ring Nut FrotherFrother and Whipper Motor Hopper Delay Board Whipper Motor Terminals P1451.40HOT/COLD Switch Optional Disconnect the wires from the switch termi- nalsLamp Replacement Refer to Fig Lamp HolderDoor Assy Upper Panel Lamp Holders Lower Panel Remove the outside window and display graphicAs assembly Lamp Starter and SocketLevel Control Board and Level Probe Level Control Board and Level Probe Limit Thermostat Limit ThermostatOverflow Protection Switch From Main HarnessBoard Rinse /RUN Switch RINSE/RUN SwitchSolenoid Valve Cold Water Optional Cold Water Solenoid ValveCold Water Solenoid Terminals Solenoid Valves DispenseSolenoid Valves Dispense Solenoid Valve InletSolenoid Valve Inlet Tank HeaterMain Wiring Thermostat Harness Tank Heater SwitchTank Heater Tank Heater Switch Tank Heater Switch TerminalsSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3
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