Bunn FMD-4, FMD-5 service manual Solenoid Valve Inlet, Inlet Solenoid Valve

Page 37

SERVICE (cont.)

SOLENOID VALVE (INLET)

J1

J2

J4

J3

J1

J2

J4

J3

P2635

FIG. 33 INLET SOLENOID VALVE

Location:

The inlet solenoid is located on the lower left side near the rear panel.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white and violet wires from the solenoid valve.

3.Check the voltage across the white and violet 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 and 120/240 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 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 violet wires to the solenoid.

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. Listen carefully in the vicinity of the solenoid valve for a "clicking" 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 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. 34 and reconnect the wires.

WHI from Main Harness

 

VIO from Main Harness

P2641

FIG. 34 INLET SOLENOID VALVE TERMINALS

37

35135 012103

 

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Contents Phone 217 529-6601 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction BUNN-O-MATIC Commercial Product WarrantyUser Notices FMD-428368.0000 00831.0000FMD-4 FMD-5 Electrical Requirements Initial SET-UPElectrical HOOK-UP Plumbing RequirementsInitial Fill & Heat Liquid Level Control Rinse TimersRunning a Rinse Sequence Dispenser USEAdjustments CleaningCold Beverage SET-UP Optional Hopper Motor Speed ProgramingDraining the HOT Water Tank Problem TroubleshootingProduct will not dispense Probable CauseProbable Cause Remedy Stat for testing procedures. See Problem Probable CauseDripping from dispense tip Lime build-up LeaksWeak product Water Temperature Product overflows container Dispense SwitchRefer to Operation Rinse Timer. See Tip with a thermometer. ReadingTroubleshooting Problem Component Access ServiceContents Auger Drive Components FMD-4Spacer Auger Motor Hopper Base Dust Seal Washer Hopper LidRetainer Clip Panel To the rear of the auger motor mounting panel Auger Drive Components FMD-4Location Bushing Panel Auger Drive Shaft Auger Drive Components FMD-4 & FMD-5Locknut Hopper Dust SealRemove dust seal 17 from auger motor Ballasts FMD-4 & FMD-5 Refer to and reconnect the wiresLocation Control ThermostatControl Board Control BoardService Control Board Connectors FMD-4 Dispense Switchs FMD-4 & FMD-5FMD-5 Dispense Switch Terminals Dispense SwitchesFAN FANComponents Frother and Whipper Motor FMD-4 shown & FMD-5Whipper Motor Terminals INCREASE/DECREASE Switch INCREASE/DECREASE SwitchLamp Holders Lamp Replacement Refer to FigDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Starter and Socket Refer to Location Lamp Replacement Refer toLimit Thermostat Limit ThermostatBLK from Main Harness BRN/BLK to RINSE/RUN SwitchBoard J2-3 HOT/COLD Switch HOT/COLD Switch OptionalCold Water Solenoid Valve Solenoid Valve Cold Water OptionalDispense Solenoid Valve Dispense Solenoid Valve Terminals Solenoid Valve Dispense FMD-4 & FMD-5Inlet Solenoid Valve Solenoid Valve InletMain Harness Thermostat Tank HeaterTank Heater Switch Pull component bracket out the front of the dis Tank Heater Relay 120V Dispensers onlyIf the resistance measures as described, proceed to step Remove and discard the transformer TransformerWHI from BLK from Main Harness WHI/GRN fromSchematic Wiring Diagram FMD-4 Single PHASE, 60HZ Schematic Wiring Diagram FMD-5 Single PHASE, 60HZ
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FMD-4, FMD-5 specifications

The Bunn FMD-5 is a state-of-the-art coffee dispenser designed specifically for high-volume coffee brewing situations. This machine is ideal for restaurants, convenience stores, and other establishments that require an efficient and reliable coffee dispensing solution.

One of the primary features of the Bunn FMD-5 is its ability to brew and serve fresh, hot coffee with exceptional speed. The unit is capable of dispensing up to five gallons of coffee per hour, making it an ideal choice for busy environments where customer demand is high. The system utilizes a digital brewer control that allows for precise brewing temperatures and times, ensuring consistency in flavor and quality.

The FMD-5 also incorporates advanced technologies to streamline the brewing process. It features a programmable control panel that allows users to adjust settings based on their specific needs. This includes the ability to set brew cycles, control brew levels, and even program different brew strengths. The easy-to-read digital display shows real-time information, making it simple for operators to monitor the brewing process.

Another notable characteristic of the Bunn FMD-5 is its compact and space-saving design. Despite its robust brewing capacity, the unit is designed to fit easily in various retail and foodservice environments. The machine is also built with durable materials, ensuring longevity and reliability under heavy usage.

For maintenance, the FMD-5 is designed with user convenience in mind. It features removable components and accessible areas for easy cleaning and routine maintenance. Users can also benefit from preventative maintenance features that monitor the machine’s performance, alerting operators to any potential issues before they escalate.

In terms of versatility, the Bunn FMD-5 can accommodate different brewing systems and coffee types, allowing users to customize their offerings based on customer preferences. It supports pre-ground coffee and can also be adapted for different brewing styles, enhancing its usability in various coffee service environments.

Overall, the Bunn FMD-5 is an impressive combination of speed, efficiency, and flexibility, making it an excellent choice for any operation that demands high-quality coffee with minimal wait time. Whether you are serving a morning rush of customers or maintaining a steady stream of coffee through the day, the Bunn FMD-5 stands out as a reliable and efficient coffee dispensing solution.
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