Bunn FMD-4, FMD-5 Solenoid Valves Dispense all Models, Dispense Solenoid Valves P1637.40 Location

Page 47

SERVICE (cont.)

SOLENOID VALVES (DISPENSE) (all Models)

FMD DBC-3 shown

FIG. 44 DISPENSE SOLENOID VALVES P1637.40 Location:

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

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the two wires from the solenoid valve. With the “RUN/RINSE” switch in the “RINSE” (up- per) position press the appropriate dispense switch on front of the door.

3.With a voltmeter, check the voltage across the two wires. Connect the dispenser to the power source. The indication must be:

a)120 volts ac for two wire 120 volt models, three wire 120/208 volt, and 120/240 volt models.

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

c)230 volts ac for two wire 230 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 Diagrams and check dispenser wiring harness.

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

If continuity is present as described, reconnect the two 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. With “RUN/RINSE” switch in the “RINSE” (upper) position press the appropriate dispense switch and 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 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 two wires from the solenoid valve.

2.Turn off the water supply to the dispenser.

3.Drain enough water from the tank (approximately 1.0 gallon) so the water level is below the dispense valve mounting hole.

4.Disconnect the water line from the solenoid valve.

5.Remove the #10-32 screw securing the solenoid valve to side of the tank. Remove solenoid valve.

6.Using the #10-32 screw install new solenoid valve on side of the tank

7.Push the water line onto the tube on bottom of solenoid valve.

8.Refer to schematic wiring diagrams when recon- necting the wires.

to Dispense Switch

to Control Board

FIG. 45 DISPENSE SOLENOID VALVE

P1645

 

TERMINALS

 

 

47

 

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 Remedy ProblemProduct will not dispense Level Control Board and Probe FMD-1Problem Probable Cause Remedy Troubleshooting Procedures. See Product overflows container Dispense SwitchInstall a regulator if necessary to Excess dust Fan Refer to Service42672 20,23 Component AccessAccess Panels SERVICEcontLocation Service Auger Drive Components all ModelsTest Procedures Auger Motor Retainer Clip Panel RED to Control Board ServiceAuger Drive Components Spacer Auger Motor Hopper Base Dust Seal WasherLocknut Auger Motor Bracket Remove auger drive shaft bushing from hopperRinse and dry each item thoroughly Bushing Panel Auger Drive ShaftAuxillary 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 positionControl board to the component bracket Using four #6-32 keps nutsConnectors on the control board Control BoardControl 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 Q7 & MOV2 Controls Refill Valve Q1 & MOV1 Controls Left Whipper MotorQ2 & MOV3 Controls Center Whipper Motor Q5 & MOV4 Controls Right Whipper MotorBLK 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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