Bunn POWDER AUTO FILL service manual Dispense Solenoid Valve Location

Page 32

SERVICE (cont.)

DISPENSE SOLENOID VALVE

P1935

FIG. 31 DISPENSE SOLENOID VALVE Location:

The dispense solenoid valve is located on the left side of the dispenser base inside of the rear cover.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Disconnect the white/red and white/brown wires from the solenoid valve.

3.Check the voltage across the white/red and white/ brown wires with a voltmeter. Connect the dis- penser to the power source. The indication must be:

a)120 volts ac for 120 volt models.

b)230 volts ac for 230 volt CE 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 the dispenser wiring harness.

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

If continuity is present as described, reconnect the white/red and white/brown 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. Press the dis- pense switch and listen carefully for a "clicking" sound as the 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 water line before the solenoid valve or, the solenoid valve may require inspection for wear and the removal of waterborne particles.

If the sound is not heard as described, replace the solenoid valve.

Removal and Replacement:

1.Disconnect the dispenser from the power source and the water supply.

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

3.Remove the white/red and white/brown wires from the solenoid valve.

4.Disconnect the water lines to and from the solenoid valve.

5.Remove the two #8-32 nuts securing the solenoid mounting bracket to the dispenser base. Remove the solenoid and bracket assembly.

6.Remove the two #10-32 screws and lockwashers securing the solenoid valve to the bracket.

7.Install a new solenoid valve to the bracket using two #10-32 screws and lockwashers.

8.Install the solenoid and bracket to the base and secure with two #8-32 nuts.

9.Install the water lines to and from the solenoid valve using pipe thread sealant (BOM #M2526.0000) and tighten securely.

10.Refer to Fig. 32 when reconnecting the wires.

WHI/RED to Control

Board (J7-2)

WHI/BRN to Control

Board (J7-4)

P1909

FIG. 32 DISPENSE SOLENOID TERMINALS

32

29793 011500

 

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Contents Bunn Powder Auto Fill Introduction WarrantyInitial SET-UP User Notices Operating Instructions Adjustments Rinse and dry each item thoroughly before reas- sembling CleaningRecommended Daily Cleaning and Maintenance Tips Fault List Normal operation Powder Auto-Fill ready toDispense Door not closedTroubleshooting Problem Probable CauseCDS product tastes watery or sugary ProblemRemedy Problem Probable Cause Remedy Procedures. See Improper adjustment of productInstall a regulator if necessary to Product overflows CDS hopper Control Board and ProbeService Component AccessAuger Drive Components Hopper LidRetainer Clip Spacer Dust Seal Hopper BaseDiagrams and check wiring harness Auger Drive MotorFrother and MIXING/WHIPPER Chamber Mixing ChamberWhipper Motor Volts ac for 120 volt models Volts ac for 230 volt CE modelsInstall dispense tip into the bottom of the whipper chamber Whipper MotorIf voltage is present as described, proceed to #5 If voltage is present as described, proceed to #9Test Procedure Low Product Detect Instal the new control board using the four #6-32 keps nuts Remove the control boardLocation TEST/SERVICE SwitchDisconnect the wires from the switch terminals Main Power ON/OFF Switch Main Power ON/OFF SwitchLamp Cord Assembly Refer to when reconnecting the wiresRemove new nut and washer from new lamp cord connector Lamp Cord ConnectorDisconnect the lamp cord from the lamp cord connector Lamp HOLDER/SOCKET Assembly Close the dispenser doorTransformer TransformerPotentiometer PotentiometerHopper Level Indicator Hopper Level IndicatorHopper Switch Hopper SwitchDoor Switch Door SwitchAdjustments Pressure Regulator and Needle ValveDispense Solenoid Valve Dispense Solenoid Valve LocationWiring Diagrams Schematic Wiring Diagram PAF BLK REDWiring 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.

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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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