Bunn service manual Solenoid Valve Inlet FMD-1 & FMD-2, Tank Heater

Page 36

SERVICE (cont.)

SOLENOID VALVE (INLET) - FMD-1 & FMD-2 (cont.)

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 blockage in the water line 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 violet wires from the sole- noid valve.

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

3.Disconnect the water lines to and from the sole- noid valve.

4.Remove the two #8-32 screws securing the sole- noid to the rear of the dispenser housing. Remove solenoid.

5.Remove the two #8-32 U-Type fasteners from the solenoid bracket.

6.Install the two #8-32 U-Type fasteners and the two #8-32 screws on the new solenoid.

7.Install new solenoid on rear of dispenser housing and tighten the two screws

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

9.Refer to Fig. 38 and reconnect the wires.

WHI from Main Harness

VIO from Main Harness

P1217

FIG. 38 INLET SOLENOID VALVE TERMINALS

TANK HEATER - FMD-1 (shown) & FMD-2

 

FIG. 39 TANK HEATER

P1665

 

Location:

 

The tank heater is located inside the tank and secured to the tank lid.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Check the voltage across the black and white wires 120 volt models or black and red wires for 120/208 volt models or 120/240 volt models with a voltme- ter. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models;

b)208 volts ac for three wire 120/208 volt models.

c)240 volts ac for three wire 120/240 volt models.

3.Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #4.

If voltage is not present as described, refer to the dispenser wiring diagram and check the wiring har- ness.

4.Disconnect the black wire and the white or red wire from the tank heater terminals.

5.Check for continuity across the tank heater termi- nals.

If continuity is present as described, reconnect the wires, the tank heater is operating properly.

If continuity is not present as described, replace the tank heater.

36

29112 101598

 

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Contents BUNNFMD-1 FMD-2 Warranty IntroductionUser Notices FMD-1 FMD-200656.0000 FMD-1 only28368.0001 Initial SET-UP Electrical RequirementsElectrical HOOK-UP Plumbing RequirementsRinse Timer FMD-2 only Initial Fill & HeatLiquid Level Control Running a Rinse SequenceCleaning AdjustmentsHopper Motor Speed Adjustment FMD-1 Cold Beverage SET-UP Optional FMD-2 onlyDraining the HOT Water Tank Troubleshooting ProblemProduct will not dispense Probable CauseProbable Cause Remedy Problem Probable Cause Stat for testing procedures. SeeFMD-1 SeeProblem Probable Cause Remedy Refer to Service Lamp, see page 28 for lamp replacement Dispenser is making unusualService Component AccessContents Auger Drive Components FMD-1Retainer Clip Hopper Assembly Hopper LidSpacer Auger Motor Hopper Base Dust Seal Washer Retainer Clip Ing panelAuger Drive Components FMD-1 To the rear of the auger motor mounting panelAuger Drive Components FMD-2 Hopper Hopper Assy Disconnect the wires from the auger motor 16 to be removed Remove dust seal 17 from auger motorRemove auger motor and discard Ballast FMD-1 & FMD-2 LocationControl Board FMD-2 only Thermostat TerminalsService Dispense Switch Dispense Switchs FMD-1 & FMD-2 Dispense Switch Terminals P1449 FAN FMD-1 & FMD-2FMD-2 Frother and Whipper Motor FMD-1 shown & FMD-2 Whipper Motor Terminals P1221Hopper Drive Board FMD-1 only Hopper Drive BoardHopper Drive Board FMD-1 only Hopper Drive Board TerminalsLamp Replacement Refer to Fig Door Assy Upper Panel Lamp Holders Lower PanelLamp Replacement Refer to As assemblyLamp Starter and Socket Refer to Location Level Control Board and Level Probe FMD-1 onlyReconnect the violet wire to terminal Level Control Board and Level Probe FMD-1 onlyRINSE/RUN Switch FMD-1 LocationRINSE/RUN Switch FMD-2 WHI/RED toBLK from Main Harness WHI/BRN to YEL to Control Board J2-3 Solenoid Valve Cold Water OPTIONALFMD-2 only Cold Water Solenoid ValveFMD-1 Solenoid Valve Dispense FMD-1 & FMD-2 Solenoid Valve Inlet FMD-1 & FMD-2 Tank HeaterTank Heater FMD-1 shown & FMD-2 Main Harness ThermostatTransformer FMD-2 only WHI/GRN T7 WHI/BLK T12Schematic Wiring Diagram FMD-1 Single PhaseSchematic Wiring Diagram FMD-2
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FMD-2, FMD-1 specifications

The Bunn FMD-2 is an advanced coffee dispensing machine designed for high-traffic environments, such as cafés, restaurants, and convenience stores. This commercial coffee equipment stands out for its reliability, efficiency, and user-friendly features, making it a preferred choice among coffee retailers.

A standout feature of the FMD-2 is its dual coffee bean hopper system, which allows for the storage and dispensing of two different coffee blends simultaneously. This versatility provides establishments the opportunity to cater to varying customer preferences, whether they prefer a robust espresso or a smooth medium roast. The hoppers can hold a significant amount of coffee beans, ensuring that the machine can keep up with high demand without the need for frequent refilling.

The FMD-2 incorporates state-of-the-art brewing technology, including the ability to brew coffee quickly while preserving the essential flavor characteristics of the beans. Its precision brewing process ensures consistency in taste and quality, which is crucial for customer satisfaction in a commercial setting. The machine is equipped with adjustable brew times and temperatures, allowing operators to fine-tune the brewing process according to specific coffee styles or customer preferences.

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Overall, the Bunn FMD-2 is a versatile, reliable, and innovative coffee dispensing solution that meets the demands of today’s coffee enthusiasts. With its dual hopper system, precision brewing technology, and user-friendly interface, it’s an ideal choice for any establishment looking to elevate their coffee offerings and enhance customer experience.
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