Bunn POWDER AUTO FILL service manual Door Switch

SERVICE (cont.)

DOOR SWITCH

ACTUATOR

P1934

FIG. 28 DOOR SWITCH

Location:

The door switch is located on the right side panel under the housing top cover.

Test Procedures:

1.Disconnect the dispenser from the power source.

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

3.Check continuity between pins 8 & 9 on the wiring harness using an ohmmeter. Continuity must be present when the door is closed. Continuity must not be present when the door is open.

4.Reconnect the twelve pin connector to the control board.

5.Gain access to the door switch using steps listed in Removal and Replacement.

6.Disconnect the wires from the door switch.

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

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

If continuity is not present s described, replace the door switch.

Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Remove the hopper assembly from the dispenser.

3.Remove the dispenser from the CDS machine and place it on a flat work surface.

4.Disconnect the door lamp cord from the lamp connector.

5.Remove the two #8-32 screws securing the door hinge to the dispenser housing.

6.Carefully pull the door forward until the door sup- port arms come completely out of the dispenser housing and set aside.

7.Remove the six #8-32 truss head screws securing the rear cover to the dispenser housing.

8.Remove the six #8-32 round head screws securing the front of the housing to the side panels.

9.Remove the six #8-32 truss head screws securing the back of the housing to the side panels.

10.Carefully lift and spread the housing to remove it from the rest of the dispenser.

11.Remove the door switch actuator from the nylon standoff.

12.Noting the orientation of the door switch, remove the two #6-32 screws and the nylon standoff secur- ing the switch mounting bracket to the dispenser housing. Remove the switch.

13.Attach the new door switch taking care to orient the switch correctly in the mounting bracket and se- cure in place with two #6-32 screws and nylon standoff.

14.Reconnect the wires to the door switch. Refer to Fig. 29.

15.Install the door switch actuator orienting the notched side against the right side housing panel. Refer to Fig. 28.

16.Reassemble the dispenser top housing, rear panel, and door assembly to the dispenser.

	ORA to Control
	Board (J1-9)
	GRN to Control
	Board (J1-8)
	P1908
	FIG. 29 DOOR SWITCH TERMINALS
30	29793 061599