Bunn FMD-4, FMD-5 manual Transformer all Models, Disconnected from the main wiring harness

Page 53

SERVICE (cont.)

TRANSFORMER (all Models)

FMD DBC-3 shown

FIG. 56 TRANSFORMER

P1646

 

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 pin plug from the main harness from the four pin connector on the transformer.

3Check the voltage across black wire (pin 1) and the

white wire (pin 2) on the plug from the main har- ness. 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 and 120/240 volt models.

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

d)230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described reconnect the plug and the connector 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 J1-1 and J1-2 on the eight pin connector at the 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 two #8-32 screws securing the com- ponent bracket to the dispenser housing base.

2.Pull component bracket out the front of the dispenser far enough so the transformer connector can be

disconnected from the main wiring harness.

3Disconnect the transformer four pin connector from the four pin plug on the main wiring harness.

4.Remove the two #6-32 keps nuts 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 component bracket and secure with two #6-32 keps nuts.

7.Connect the four pin connector on the transformer to four pin plug on the main wiring harness.

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

 

P1647

 

FIG. 57 TRANSFORMER TERMINALS

53

42672 122209

 

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Contents Phone 217 529-6601 FAX 217 FMD SeriesExcluding regular maintenance items BUNN-O-MATIC Commercial Product WarrantyIntroduction Cleaning Required Regular Maintenance Problem Probable Cause Product will not dispense ProblemLevel Control Board and Probe FMD-1 RemedyProblem Probable Cause Remedy Troubleshooting Install a regulator if necessary to Product overflows container Dispense SwitchExcess dust Fan Refer to Service Procedures. See42672 20,23 Component AccessAccess Panels SERVICEcontLocation Service Auger Drive Components all ModelsTest Procedures Auger Motor Auger Drive Components ServiceSpacer Auger Motor Hopper Base Dust Seal Washer Retainer Clip Panel RED to Control BoardRinse and dry each item thoroughly Remove auger drive shaft bushing from hopperBushing Panel Auger Drive Shaft Locknut Auger Motor BracketAuxillary Control Board FMD DBC-3 only Disconnect the dispenser from the power source Service Auxillary Control BoardBallast all Models ServiceControl Board Test Procedure Power SupplyHopper Motor Control Circuitry Check that the RINSE/RUN switch is in the Rinse positionConnectors on the control board Using four #6-32 keps nutsControl Board Control board to the component bracketControl Board Check that the rinse/run switch is in the run posi- tion Control Board Connectors Remove bulb from the tank Remove temperature probe from the tankLocation WHI to Main Control ThermostatBLK to Main If voltage is present as described, proceed to #7 Open the dispenser door and remove the bottom door coverIf voltage is present as described, proceed to #6 FMD DBC-2FD Digital Touch Control Switch FMD DBC-2,DBC-3FMD DBC-3 Connectors Digital Touch Control SwitchEMI Filter EMI Filter 230 Volt FMD DBC-3Vacuum FAN all Models Test ProceduresDisconnect the black and white wires from the fan terminals Frother and Whipper Motor Frother and Whipper Motor all Models except -2FDWill seat inside the whipper chamber Frother and Whipper MotorHopper Drive Board Hopper Drive Board FMD-1 onlyHopper Drive Board Terminals Disconnect the wires from the switch terminals HOT/COLD Switch Optional for FMD DBC-3Terminals Door Assy Upper Panel Lamp Holders Lower Panel Lamp Holder all ModelsLamp Starter and Socket Level Control Board and Level Probe FMD-1 only Reconnect the violet wire to terminalLevel Board Terminals Limit Thermostat Limit Thermostat all ModelsOverflow Protection Switch RINSE/RUN Switch Rinse /RUN Switch all ModelsCold Water Solenoid Terminals Solenoid Valve Cold Water Optional for FMD-2,-3,-4,-5Dispense Solenoid Valves P1637.40 Location Solenoid Valves Dispense all ModelsSolenoid Valve HOT Water Dispense Solenoid Valve FMD-2FD,DBC-2FD,-3,DBC-3Inlet Solenoid Valve Solenoid Valve Inlet all ModelsTank Heater all Models WHI or RED to Main BLK to Limit Wiring HarnessBRN/BLK from WHI from Main Harness Tank Heater Relay FMD-4,-5,120V Dispensers onlyTank Heater Switch Tank Heater Switch all ModelsRemove and discard the transformer Disconnected from the main wiring harnessTransformer all Models Q2 & MOV3 Controls Center Whipper Motor Q1 & MOV1 Controls Left Whipper MotorQ5 & MOV4 Controls Right Whipper Motor Q7 & MOV2 Controls Refill ValveBLK Schematic Wiring Diagram FMD-1WHI-16 Schematic Wiring Diagram FMD-1ASchematic Wiring Diagram FMD-2 Schematic Wiring Diagram FMD-2A Schematic Wiring Diagram FMD DBC-2 Freeze Dried W/HOT Water Schematic Wiring Diagram FMD-2FD 42672 42672 42672 42672 Schematic Wiring Diagram FMD DBC-3 With HOT Water Dispense Schematic Wiring Diagram Fmda DBC-3 With HOT Water Dispense 42672 42672 42672 42672 Schematic Wiring Diagram FMD-5A
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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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