Bunn POWDER AUTO FILL service manual Potentiometer

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SERVICE (cont.)

POTENTIOMETER

P1931

FIG. 24 POTENTIOMETER

Location:

The potentiometer is located under the hopper support panel mounted to the left of the whipper motor and mounted on a bracket. Adjustments can be made by removing the 0.50" plug located on the whipper motor mounting panel.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Remove the six #8-32 screws securing the rear cover to the dispenser housing.

3.Disconnect the three pin connector (J3) from the control board.

4.Check the resistance between pins 1 & 3 of the potentiometer connector using an ohmmeter. The indication must be between 800 and 1200 ohms.

If the resistance measures as described, proceed to #5. If resistance does not measure as described, replace the potentiometer assembly.

5.Adjust the potentiometer fully clockwise.

6.Check resistance between pins 2 & 3 of the poten- tiometer connector with an ohmmeter. The indica- tion must be between 800 and 1200 ohms. Check the resistance between pins 1 & 2 of the potentiom- eter connector with an ohmmeter. The indication must be less than 20 ohms.

If the resistance measures as described, proceed to #7. If resistance does not measure as described, replace the potentiometer assembly.

7.Adjust the potentiometer fully counterclockwise.

8.Check resistance between pins 1 & 2 of the poten- tiometer connector with an ohmmeter. The indica- tion must be between 800 and 1200 ohms. Check the resistance between pins 2 & 3 of the potentiom- eter connector with an ohmmeter. The indication must be less than 20 ohms.

If the resistance measures as described, the potentiom- eter is operating properly.

If resistance does not measure as described, replace the potentiometer assembly.

Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Remove the six #8-32 screws securing the rear panel to the dispenser.

3.Disconnect the three pin connector (J3) from the control board.

4.Open the dispenser door and remove the #8-32 screw securing the potentiometer mounting bracket to the whipper motor mounting panel.

5.Remove the potentiometer and mounting bracket as an assembly.

6.Remove the facenut and locking washer securing the potentiometer to the bracket.

7.Install the new potentiometer to the mounting bracket using the locking washer and facenut.

8.Install the potentiometer and bracket assembly to the whipper motor panel and secure with #8-32 screw.

9.Connect the three pin connector (J3) to the control board.

10.Install the rear panel to the housing and secure with six #8-32 screws.

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29793 061599

 

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Contents Bunn Powder Auto Fill Warranty Initial SET-UPIntroduction User Notices Operating Instructions Adjustments Cleaning Recommended Daily Cleaning and Maintenance TipsRinse and dry each item thoroughly before reas- sembling Door not closed Fault ListNormal operation Powder Auto-Fill ready to DispenseProblem Probable Cause TroubleshootingProblem RemedyCDS product tastes watery or sugary Problem Probable Cause Remedy Product overflows CDS hopper Control Board and Probe Procedures. SeeImproper adjustment of product Install a regulator if necessary toComponent Access ServiceSpacer Dust Seal Hopper Base Auger Drive ComponentsHopper Lid Retainer ClipAuger Drive Motor Diagrams and check wiring harnessMixing Chamber Frother and MIXING/WHIPPER ChamberVolts ac for 120 volt models Volts ac for 230 volt CE models Whipper MotorWhipper Motor Install dispense tip into the bottom of the whipper chamberIf voltage is present as described, proceed to #9 If voltage is present as described, proceed to #5Test Procedure Low Product Detect Remove the control board Instal the new control board using the four #6-32 keps nutsTEST/SERVICE Switch Disconnect the wires from the switch terminalsLocation Main Power ON/OFF Switch Main Power ON/OFF SwitchRefer to when reconnecting the wires Lamp Cord AssemblyLamp Cord Connector Disconnect the lamp cord from the lamp cord connectorRemove new nut and washer from new lamp cord connector Close the dispenser door Lamp HOLDER/SOCKET AssemblyTransformer TransformerPotentiometer PotentiometerHopper Level Indicator Hopper Level IndicatorHopper Switch Hopper SwitchDoor Switch Door SwitchPressure Regulator and Needle Valve AdjustmentsDispense Solenoid Valve Location Dispense Solenoid ValveBLK RED Wiring Diagrams Schematic Wiring Diagram PAFWiring Diagrams Schematic Wiring Diagram Pafa

POWDER AUTO FILL specifications

The Bunn Powder Auto Fill is a cutting-edge coffee brewing system designed to enhance efficiency and precision in commercial environments. This innovative machine simplifies the brewing process by incorporating automated features that ensure consistent quality and optimal performance.

One of the standout features of the Bunn Powder Auto Fill is its ability to automatically dispense powdered beverage mixes. This is made possible through advanced technology that streamlines the process, reducing the need for manual input. With the push of a button, operators can quickly prepare a variety of specialty beverages, including cappuccinos, lattes, and flavored coffee drinks. This not only saves time but also minimizes the likelihood of human error in measurements, ensuring each cup is consistently brewed to perfection.

The Bunn Powder Auto Fill is designed with versatility in mind. It accommodates a wide range of powdered ingredients, allowing businesses to offer an extensive menu without investing in multiple machines. This adaptability makes it an ideal solution for coffee shops, convenience stores, and other establishments where customer preferences may vary.

Moreover, the machine features a robust heating system that provides rapid brewing capabilities. This ensures that beverages are served at the optimal temperature, enhancing the overall customer experience. The integrated hot water faucet allows for quick access to hot water, making it easy to prepare additional drinks or even food items like soups and oatmeal.

Durability is another key characteristic of the Bunn Powder Auto Fill. Built with high-quality materials to withstand the rigors of daily use, this machine is designed to deliver reliable performance over time. Its compact and sleek design allows for easy placement in any setting, taking up minimal counter space while blending seamlessly with existing décor.

Additionally, the Bunn Powder Auto Fill incorporates user-friendly controls and displays. This intuitive interface allows staff to quickly familiarize themselves with the machine's operation, which is crucial in high-demand environments. The system also features programmable settings, enabling users to customize brew strengths and portion sizes according to customer preferences.

In conclusion, the Bunn Powder Auto Fill is a game-changer for businesses looking to elevate their beverage offerings. With its automation, versatility, reliability, and user-centric design, this machine not only boosts efficiency but also enhances the quality of every cup served. Whether in a bustling café or a busy convenience store, the Bunn Powder Auto Fill stands out as a smart investment for any beverage-focused establishment.
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