Bunn FMD-4, FMD-5 Transformer, Remove and discard the transformer, WHI from BLK from Main Harness

Page 41

SERVICE (cont.)

TRANSFORMER

J1

J2

J4

J3

J1

J2

J4

J3

P2635

FIG. 41 TRANSFORMER

Location:

The transformer is located behind the lower front access cover, mounted on the right rear side of the component bracket.

Test Procedure:

1.Disconnect the dispenser from the power source.

2.Disconnect the four wires of the main harness from the transformer.

3Check the voltage across black wire and the white wire on the main harness. Connect the dispenser to power source. The indication must be:

a.120 volts ac for two wire 120 volt models.

b.120 volts for three wire 120/208 volt models and three wire 120/240 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described reconnect the wires and proceed to #5.

If voltage is not present as described, refer to the wiring diagrams and check the main wiring harness.

5.Check the voltage between J3-5 and J3-6 on the six pin connector at either control board. Connect the dispenser to the power source. The indication must be 24 volts ac.

If voltage is present as described the transformer is operating properly.

If voltage is not present as described, replace the transformer.

Removal and Replacement:

1.Loosen the three #8-32 screws securing the com- ponent bracket to the dispenser housing base.

2.Pull component bracket out the front of the dis-

penser far enough so the transformer can be disconnected from the main wiring harness.

3Disconnect the transformer from the main wiring harness.

4.Remove the two #8-32 screws securing the trans- former to the rear of the component bracket.

5.Remove and discard the transformer.

6.Install new transformer on the rear of the compo- nent bracket and secure with two #8-32 screws.

7.Connect the transformer to the main wiring har- ness (see Fig. 42).

8.Place the component bracket into position and tighten the three #8-32 screws.

 

LINE

WHI from

BLK from

Main Harness

Main Harness

 

WHI/GRN from

WHI/BLK from

Main Harness

Main Harness

 

P2640

FIG. 42 TRANSFORMER TERMINALS

41

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-4FMD-4 FMD-5 00831.000028368.0000 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-4Retainer Clip Panel Hopper LidSpacer Auger Motor Hopper Base Dust Seal Washer Location Auger Drive Components FMD-4To the rear of the auger motor mounting panel 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-5 Dispense Switchs FMD-4 & FMD-5FMD-4 Dispense Switch Terminals Dispense SwitchesFAN FANComponents Frother and Whipper Motor FMD-4 shown & FMD-5Whipper Motor Terminals INCREASE/DECREASE Switch INCREASE/DECREASE SwitchDoor Assy Upper Panel Lamp Holders Lower Panel Lamp Replacement Refer to FigLamp Holders Lamp Starter and Socket Refer to Location Lamp Replacement Refer toLimit Thermostat Limit ThermostatBoard J2-3 RINSE/RUN SwitchBLK from Main Harness BRN/BLK to 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 If the resistance measures as described, proceed to step Tank Heater Relay 120V Dispensers onlyPull component bracket out the front of the dis 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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