SERVICE (cont.)

CONTROL BOARD (CONT.)

16.Reconnect the ten pin connector of the wiring harness to J2 of control board #1.

17.Gently pull the liquid level probe out of the tank lid and inspect for corrosion. Replace it if necessary.

18.Place the probe so that neither end is in contact with any metal surface of the dispenser.

19.Check the voltage across the terminals of the inlet solenoid valve with a voltmeter. Connect the dis- penser to the power source. The indication must be 120 volts ac for two wire 120 volt models, three wire 120/208 volt models, three wire 120/240 volt models after a delay of approximately 10 seconds.

20.Move the probe’s flat end to the dispenser hous- ing. The indication must be 0.

21.Move the probe’s flat end away from the housing. The indication must, again, be 120 volts ac for two wire 120 volt models, three wire 120/208 volt models, three wire 120/240 volt models after a delay of approximately 5 seconds.

22.Disconnect the dispenser from the power source.

If the voltage is present as described, re-install the probe. The liquid level control circuitry is operating properly.

If the voltage is not present as described, check the pink probe wire and green tank wire for continuity.

Hopper Motor Control Circuitry (Stations 1-3, Control Board #1 & Stations 4-5, Control Board #2):

1.Disconnect the dispenser from the power source.

2.Disconnect the six pin connector from J3 of the appropriate control board.

3.Check the voltage across pins 5 & 6 of the six pin connector on the wiring harness with a voltmeter. Connect the dispenser to the power source. The indication must be 24 volts ac.

4.Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 5. If voltage is not present as described, refer to the wiring diagram and check the dispenser wiring har- ness.

5.Reconnect the six pin connector of the wiring harness to J3 of the control board.

6.Check that the rinse/run switch is in the run position.

7.Check the voltage across the red (+) terminal and the black (-) terminal of the auger motor with a voltmeter. Connect the dispenser to the power source. Press and hold the appropriate dispense switch. After a delay of about .6 seconds, the indication must be between +4.0 and +24.5 volts dc.

If the voltage is present as described, the hopper motor control circuitry is operating properly.

If the voltage is not present as described, replace the control circuit board.

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Bunn FMD-4, FMD-5 service manual Service

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.