Bunn FMD-3 service manual Whipper Motor Terminals P1451.40, Hopper Delay Board

Page 21

SERVICE (cont.)

FROTHER AND WHIPPER MOTOR (cont.)

 

RIGHT

 

FMD- 2 & 3

 

CENTER

 

FMD-3 ONLY

LEFT

 

FMD-2 & 3

BLK to Main

 

Harness WHI/VIO

 

BLK to Main

 

Harness WHI

 

BLK to Main Harness ORA

 

BLK to Main Harness WHI

BLK to Main Harness RED

BLK to Main Harness WHI

FIG.13 WHIPPER MOTOR TERMINALS P1451.40

HOPPER DELAY BOARD

P1445.40

FIG. 14 HOPPER DELAY BOARD

Location

The hopper delay board is located behind the lower front access panel mounted in the center of the component bracket.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the eight pin plug on the main wiring harness from the eight pin connector on the hop- per delay board.

3.With the rinse/run switch in the “Run”, lower position, check the voltage across the white and black wires of the main wiring harness 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)240 volts ac for two wire 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 wir- ing diagram and check the dispenser wiring harness.

5.Reconnect the eight pin connector of the hopper delay board to the main harness.

6.Check the voltage across the terminals on the auger motor with a voltmeter. Press and hold the appropriate dispense switch. Connect the dis- penser to the power source. After a delay of .7 seconds 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.

7.Disconnect the dispenser from the power source.

If voltage is present as described the hopper delay board is operating properly.

If voltage is not present as described, replace the hop- per delay board.

Removal and Replacement:

1.Disconnect the eight pin plug from the hopper delay board.

2.Remove the two #8-32 keps nuts securing the hopper delay board to the component bracket.

3.Remove hopper delay board and discard.

4.Install new delay board on the component bracket using two #8-32 keps nuts.

5.Reconnect the eight pin connector to the hopper delay board.

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28364 011598

 

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Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisFMD-2 FMD-3 BUNN-O-MATIC Commercial Product Warranty28368.0000 00656.0000 00831.000026536.0002 FMD-2Initial SET-UP Plumbing HOOK-UP Initial Fill & HeatDraining the HOT Water Tank Remedy Problem Probable CauseTroubleshooting Replacement Control thermostatStat for testing procedures. See Dripping from dispense tip Lime build-up Product overflows container Dispense switchLeaks ColdProbable Cause Remedy ProblemDispenser is making unusual Refer to Service Lamp, see page 23 for lamp replacementNoises Water Supply Tank Heater Excess dust Fan Display not lit Lamp Lamp Holder Starter Lamp BallastComponent Access ContentsAuger Drive Components If voltage is present as described, proceed to #5 Hopper Lid Auger Wire Agitator Disc AssyOff of the auger drive shaft Auger Drive Shaft Optional Bushing Ejector ElbowRemove dust seal 18 from auger motor Auger Drive ComponentsRefer to when reconnecting the wires BallastHarness BLK to BLU From Door Interconnect Control Thermostat Remove temperature probe from the tankDispense Switch Control ThermostatLocation Dispense Switch FANLocation Frother and Whipper Motor FANSteam Collector Ring Mixing Chamber #8-32 Acorn Nut Washer Ring Nut FrotherFrother and Whipper Motor Whipper Motor Terminals P1451.40 Hopper Delay BoardDisconnect the wires from the switch termi- nals HOT/COLD Switch OptionalLamp Holder Lamp Replacement Refer to FigDoor 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 SwitchCold Water Solenoid Valve Solenoid Valve Cold Water OptionalSolenoid Valves Dispense Cold Water Solenoid TerminalsSolenoid Valve Inlet Solenoid Valves DispenseTank Heater Solenoid Valve InletMain Wiring Thermostat Harness Tank Heater SwitchTank Heater Tank Heater Switch Terminals Tank Heater SwitchSchematic Wiring Diagram FMD-1, FMD-2, & FMD-3 Schematic Wiring Diagram FMDA-1, FMDA-2, & FMDA-3
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