Bunn FMD-3 service manual Cold Water Solenoid Terminals, Solenoid Valves Dispense

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SERVICE (cont.)

SOLENOID VALVE (COLD WATER - OPTIONAL) (cont.)

8.Securely fasten the water lines to and from the solenoid valve.

9.Refer to Fig. 27 when reconnecting the wires.

WHI/YEL to Hot/

Cold Switch

WHI to Main Wiring

Harness

P1215

FIG. 27 COLD WATER SOLENOID TERMINALS

SOLENOID VALVES (DISPENSE)

P1445.40

FIG. 28 DISPENSE SOLENOID VALVES

Location:

The dispense solenoids are located on the upper left side of the tank.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and white/violet, orange or tan wires from the solenoid valve. With the “RUN/ RINSE” switch in the "RINSE" upper position press the appropriate dispense switch on front of the door.

3.Check the voltage across the white and white/ violet, orange or tan wires with a voltmeter. Connect the dispenser to the power source. The indication must be 120 volts ac for two wire 120 volt models, three wire 120/208, 120/240 volt models and 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 wiring diagram and check dispenser wiring harness.

5.Check for continuity across the solenoid valve coil terminals.

If continuity is present as described, reconnect the white and white/violet, orange or tan wires to the so- lenoid.

If continuity is not present as described, replace 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 care- fully in the vicinity of the solenoid valve for a "click- ing" 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 tank water outlet 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 white and white/violet,orange or tan wires from the solenoid valve.

2.Turn-off the water supply to the dispenser.

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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-326536.0002 00656.0000 00831.000028368.0000 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 Leaks Product overflows container Dispense switchDripping from dispense tip Lime build-up ColdProblem Probable Cause RemedyNoises Water Supply Tank Heater Excess dust Fan Refer to Service Lamp, see page 23 for lamp replacementDispenser is making unusual Display not lit Lamp Lamp Holder Starter Lamp BallastComponent Access ContentsAuger Drive Components Off of the auger drive shaft Hopper Lid Auger Wire Agitator Disc AssyIf voltage is present as described, proceed to #5 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 Steam Collector Ring Mixing Chamber #8-32 Acorn Nut FANFrother and Whipper Motor 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- nalsDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to FigLamp Holder 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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