SERVICE (cont.)

HOPPER SWITCH

P1933

FIG. 26 HOPPER SWITCH

Location:

The hopper switch is located under the hopper support panel.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Open the dispenser door and remove the hopper.

3.Manually engage and release the hopper switch actuator. The actuator must operate smoothly with- out binding at either end of its travel and an audible click must be detected near the mid point of travel.

If the actuator operates as described, proceed to #4. If the actuator does not operate as described, loosen the hopper switch mounting screws, realign the switch, and repeat the process. If the audible click cannot be detected, proceed to #4.

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

5.Check continuity between pins 8 & 10 on the harness using an ohmmeter. Continuity must be present when the hopper is correctly installed. Continuity must not be present when the hopper is removed.

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

If continuity is present as described, the hopper switch is operating properly.

If continuity is not present as described, proceed to #7.

7.Disconnect the wires from the hopper switch.

8.Check continuity between the N.O. and COM. termi- nals of the hopper switch using an ohmmeter. Continuity must be present when the actuator is engaged. Continuity must not be present when actuator is released.

If continuity is present as described, refer to wiring diagram and check the dispenser wiring harness.

If continuity is not present as described, replace the hopper switch.

Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Open the dispenser door and remove the hopper.

3.Remove the four #8-32 screws securing the hopper support panel.

4.Carefully lift the hopper support panel, remove the wires from the hopper switch, and remove the hopper support panel.

5.Noting the orientation of the switch, remove the two #4-40 screws, lockwashers and nuts securing the switch to the panel.

6.Attach the new switch to the panel taking care to orient it properly and secure with two #4-40 screws, lockwashers and nuts.

7.Manually engage and release the hopper switch actuator. The actuator must operate smoothly with- out binding at either end of its travel. If the actuator operates as described, proceed to #8. If the actua- tor does not operate as described, loosen the two screws and realign the switch and repeat the pro- cess.

8.Refer to Fig. 27 and reconnect the wires.

9.Install the hopper support panel and secure with four #8-32 screws.

GRN to Control Boad (J1-8)

RED/BLK to Control Board (J1-10)

P1904

 

FIG. 27 HOPPER SWITCH TERMINALS

29

29793 061599

 

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Bunn POWDER AUTO FILL service manual Hopper Switch
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POWDER AUTO FILL specifications

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