Bunn FMD-3 service manual Control Thermostat, Dispense Switch, Location

Page 17

SERVICE (cont.)

CONTROL THERMOSTAT (cont.)

10.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. 7 and reconnect the wires.

NOTE - The capillary tube must be clear of any electri- cal termination and not kinked.

 

 

TAN to WHI/BRN

 

 

on Tank Heater Switch

 

 

BLK to Main

 

 

Wiring Harness

 

 

WHI to Main

BLK from Limit

 

Wiring Harness

 

 

Thermostat

 

 

BLK from Tank

 

 

Heater Switch

 

 

 

BLK to Limit

 

 

Thermastat

 

MECHANICAL THERMOSTAT

ELECTRONIC THERMOSTAT

FIG. 7 THERMOSTAT TERMINALS

P1448

DISPENSE SWITCH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N R

ELEA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FULL,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P IS

2/3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N UNTIL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HO

LD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PUS

H and

 

 

FU

LL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WARNING

 

P IS

2

/3

 

 

 

 

 

 

 

 

 

 

 

 

!

 

 

T

CU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OI D

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HQ U

E

N

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L I

WH

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

TO

N

 

 

 

 

 

 

 

PLA

RE

 

 

 

 

 

 

E B

UT

 

 

 

 

 

 

 

 

 

CUP

HE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LE

AS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLA ERE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CU

P H

 

 

 

 

 

 

 

 

 

 

 

 

CE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLA ERE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CU

P H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FIG.8 DISPENSE SWITCH

P1436

 

Location:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The dispense switches are located on the lower outside of the dispenser door.

NOTE: The center dispense switch is for FMD-3 Mod- els only.

Test Procedure:

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 to be tested.

4.Check for voltage across the black and red/black wires for the right dispense switch, black and red/white wires for the center dispense switch or the black and red wires for the left dispense switch from the door interconnect wiring har- ness. 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.

c)240 volts ac for two wire 240 volt models.

5.Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #6.

If voltage is not present as described, refer to the wir- ing diagram and check the dispenser wiring harness.

17

28364 071598

 

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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 CauseStat for testing procedures. See TroubleshootingReplacement Control thermostat 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 BallastAuger Drive Components Component AccessContents 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 ComponentsHarness BLK to BLU From Door Interconnect Refer to when reconnecting the wiresBallast Control Thermostat Remove temperature probe from the tankLocation Dispense SwitchControl Thermostat Location Dispense SwitchFAN 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 graphicLevel Control Board and Level Probe As assemblyLamp Starter and Socket Level Control Board and Level Probe Limit Thermostat Limit ThermostatBoard Overflow Protection SwitchFrom Main Harness 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 InletTank Heater Main Wiring Thermostat HarnessTank Heater Switch 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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