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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Bunn POWDER AUTO FILL service manual Potentiometer
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POWDER AUTO FILL specifications

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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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