Bunn POWDER AUTO FILL service manual If voltage is present as described, proceed to #5

Page 18

SERVICE (cont.)

CONTROL BOARD and LEVEL PROBE

P1925

FIG. 11 CONTROL BOARD

Location:

The control board is located behind the rear panel, mounted on the back side of the hopper motor mount- ing panel.

Test Procedure:

Liquid Level Control

1.Disconnect the dispenser from the power source.

2.Disconnect the twelve pin connector (J1) from the control board.

3.Check the voltage across pins 2 & 3 of the twelve pin connector on the wiring harness with a voltmeter. Connect the dispenser to the power source and select the "ON" position of the main power switch. The indication must be 24 volts ac.

4.Select the "OFF" position of the main power switch and 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 the wiring diagram and check the dispenser wiring harness.

5.Reconnect the twelve pin connector to the control board (J1).

6.Disconnect the four pin connector (J7) from the control board.

7.Check the voltage across pins 1 & 3 of the four pin connector on the wiring harness with a voltmeter. Connect the dispenser to the power source and select the "ON" position of the main power switch. The indication must be:

a)120 volts ac for 120 volt models.

b)230 volts ac for 230 volt CE models.

8.Select the "OFF" position of the main power switch and disconnect the dispenser from the power source.

If voltage is present as described, proceed to #9.

If voltage is not present as described refer to the wiring diagram and check the dispenser wiring harness.

9.Reconnect the four pin connector to the control board (J7).

10.Disconnect the twelve pin connector (J1) from the control board.

11.Measure the resistance between pins 8 & 12 of the twelve pin connector on the wiring harness using an ohmmeter. The indication must be between 298k ohms and 304k ohms.

If the resistance measures as described, proceed to #12.

If the resistance does not measure as described, refer to the wiring diagram and check the dispenser wiring harness.

12.Carefully connect a piece of insulated jumper wire to the level probe contact pin (pink wire) located at the lower left rear of the dispenser.

13.Check the voltage across the terminals, first of the dispense solenoid and then of the hopper motor with a voltmeter. Connect the dispenser to the power source and select the "ON" position of the main power switch. The indication must be:

a)120 volts ac for 120 volt models.

b)230 volts ac for 230 volt CE models.

at the dispense solenoid and between 4 and 26 volts dc at the hopper motor after a delay of approxi- mately 10 seconds.

14.Touch the free end of the jumper wire to the dispenser housing. The indication must be 0 (zero) after a delay of up to 5 seconds.

15.Move the jumper wire away from the housing. The indication must again be:

a)120 volts ac for 120 volt models.

b)230 volts ac for 230 volt CE models.

at the dispense valve solenoid and between 4 and 26 volts dc at the hopper motor after a delay of up to 5 seconds.

16.Disconnect the dispenser from the power source, remove the jumper wire, and select the "OFF" posi- tion on the main power switch.

If voltage is present as described, The liquid level control circuitry is operating properly.

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

18

29793 011500

 

Page 17 Page 19
Image 18
Page 17 Page 19
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 Dispense Fault ListNormal operation Powder Auto-Fill ready to Door not closedTroubleshooting Problem Probable CauseProblem RemedyCDS product tastes watery or sugary Problem Probable Cause Remedy Install a regulator if necessary to Procedures. SeeImproper adjustment of product Product overflows CDS hopper Control Board and ProbeService Component AccessRetainer Clip Auger Drive ComponentsHopper Lid 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 boardTEST/SERVICE Switch Disconnect the wires from the switch terminalsLocation Main Power ON/OFF Switch Main Power ON/OFF SwitchLamp Cord Assembly Refer to when reconnecting the wiresLamp Cord Connector Disconnect the lamp cord from the lamp cord connectorRemove new nut and washer from new 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.

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.
Top Page Image Contents