Bunn FMD-5 manual Service Auger Drive Components all Models, Location, Test Procedures Auger Motor

Page 14

SERVICE (cont.)

AUGER DRIVE COMPONENTS (all Models)

FMD-4 shown

J1

J2

J4

J3

J1

J2

J4

J3

P4095

FIG. 2 AUGER DRIVE COMPONENTS

Location

The auger components are located inside the bottom part of the hopper except for the auger drive bracket, spacer and retaining 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. 3 for disassembly and assembly.

Test Procedures - Auger Motor

1.Disconnect the dispenser from the power source.

2.Disconnect the white/red wire and the white wire from the hopper drive board (FMD-1) or relative wires from the control board(all other models).

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 wire120/208 volt or 120/240 volt models.

c)230 volts ac for two wire 230 volt models.

4.Disconnect the dispenser from the power supply.

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 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, check the auger hopper drive board.

Removal, Cleaning and Replacement

Hopper & Auger (FMD-1,4)

1.Open the dispenser door and raise the top front cover.

2.Lift the hopper assy (15) over the pins on hopper support plate (11) and slide hopper assembly out the front of the dispenser.

3.Remove hopper lid (1) and empty product.

4.Pull off the ejector elbow (14).

5.Remove retainer clip (10) and washer (9) from the bottom of the hopper base (8).

6.Remove whipper shaft (3), wiper blade (4) and wiper drive gear (5) from the hopper base (8).

7.Remove auger wire (13) by pulling it out the front of the hopper base (8).

8.Remove auger drive bracket (6) by unscrewing left hand threads from auger drive shaft (12).

9.Slide spacer (7) and auger drive shaft bracket (6) off of the auger drive shaft (12).

10.Remove auger drive shaft (12) from hopper base

(8).

11.Wash components in a mild solution of dish deter- gent using a bristle brush when needed.

12.Rinse and dry each item thoroughly.

13.Check for damaged or broken components, replace any if necessary and reassemble hopper assem- bly.

14.Install hopper assy (15) in the dispenser by sliding hopper assy on the hopper support plate (11) until the slot in the rear of the hopper base (8) seats against the pins in the hopper support plate (11).

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42672 122209

 

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Contents FMD Series Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Excluding regular maintenance itemsIntroduction Cleaning Required Regular Maintenance Problem Probable Cause Level Control Board and Probe FMD-1 ProblemProduct will not dispense RemedyProblem Probable Cause Remedy Troubleshooting Excess dust Fan Refer to Service Product overflows container Dispense SwitchInstall a regulator if necessary to Procedures. See 42672 Component Access 20,23SERVICEcont Access PanelsLocation Service Auger Drive Components all ModelsTest Procedures Auger Motor Spacer Auger Motor Hopper Base Dust Seal Washer ServiceAuger Drive Components Retainer Clip Panel RED to Control BoardBushing Panel Auger Drive Shaft Remove auger drive shaft bushing from hopperRinse and dry each item thoroughly Locknut Auger Motor BracketAuxillary Control Board FMD DBC-3 only Service Auxillary Control Board Disconnect the dispenser from the power sourceService Ballast all ModelsTest Procedure Power Supply Control BoardCheck that the RINSE/RUN switch is in the Rinse position Hopper Motor Control CircuitryControl Board Using four #6-32 keps nutsConnectors on the control board Control board to the component bracketControl Board Check that the rinse/run switch is in the run posi- tion Control Board Connectors Remove bulb from the tank Remove temperature probe from the tankLocation WHI to Main Control ThermostatBLK to Main If voltage is present as described, proceed to #7 Open the dispenser door and remove the bottom door coverIf voltage is present as described, proceed to #6 FMD DBC-2FD Digital Touch Control Switch FMD DBC-2,DBC-3FMD DBC-3 Digital Touch Control Switch ConnectorsEMI Filter 230 Volt FMD DBC-3 EMI FilterVacuum FAN all Models Test ProceduresDisconnect the black and white wires from the fan terminals Frother and Whipper Motor all Models except -2FD Frother and Whipper MotorFrother and Whipper Motor Will seat inside the whipper chamberHopper Drive Board FMD-1 only Hopper Drive BoardHopper Drive Board Terminals HOT/COLD Switch Optional for FMD DBC-3 Disconnect the wires from the switch terminalsTerminals Lamp Holder all Models Door Assy Upper Panel Lamp Holders Lower PanelLamp Starter and Socket Reconnect the violet wire to terminal Level Control Board and Level Probe FMD-1 onlyLevel Board Terminals Limit Thermostat all Models Limit ThermostatOverflow Protection Switch Rinse /RUN Switch all Models RINSE/RUN SwitchSolenoid Valve Cold Water Optional for FMD-2,-3,-4,-5 Cold Water Solenoid TerminalsSolenoid Valves Dispense all Models Dispense Solenoid Valves P1637.40 LocationHOT Water Dispense Solenoid Valve FMD-2FD,DBC-2FD,-3,DBC-3 Solenoid ValveSolenoid Valve Inlet all Models Inlet Solenoid ValveWHI or RED to Main BLK to Limit Wiring Harness Tank Heater all ModelsTank Heater Relay FMD-4,-5,120V Dispensers only BRN/BLK from WHI from Main HarnessTank Heater Switch all Models Tank Heater SwitchRemove and discard the transformer Disconnected from the main wiring harnessTransformer all Models Q5 & MOV4 Controls Right Whipper Motor Q1 & MOV1 Controls Left Whipper MotorQ2 & MOV3 Controls Center Whipper Motor Q7 & MOV2 Controls Refill ValveSchematic Wiring Diagram FMD-1 BLKSchematic Wiring Diagram FMD-1A WHI-16Schematic Wiring Diagram FMD-2 Schematic Wiring Diagram FMD-2A Schematic Wiring Diagram FMD DBC-2 Freeze Dried W/HOT Water Schematic Wiring Diagram FMD-2FD 42672 42672 42672 42672 Schematic Wiring Diagram FMD DBC-3 With HOT Water Dispense Schematic Wiring Diagram Fmda DBC-3 With HOT Water Dispense 42672 42672 42672 42672 Schematic Wiring Diagram FMD-5A
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