Bunn CDS-3 User Manual

36

If  continuity  is  present  as  described,  the  day/night 

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

day/night switch.
Removal and Replacement:

1.  Pull the dispenser drawer out until the drawer hits 

the drawer stop. Using a screwdriver gently pry up 

on the drawer stop and remove the drawer from 

the dispenser.

2.  Remove the four #8-32 locking screws securing 

the switch panel to the drawer.

3.  Lift switch panel with wires and L.E.D. board as an 

assembly.

4.  Turn switch panel over and remove the wires from 

the DAY/NIGHT switch.

5.  Compress the clips on the back of the control panel 

and gently push switch through the opening.

6.  Push the new switch into the opening, with the “o” 

on the switch to the outside, until the clips snap 

into position.

7.  Reconnect the wires to the switch. Refer to Fig. 26 

when reconnecting wires.

8.  Position  the  switch  panel  inside  the  drawer  and 

secure with four #8-32 locking screws.

9.  Reinstall drawer.

FIG. 26 DAY/NIGHT SWITCH TERMINALS

P1335

FIG. 25 DAY/NIGHT SWITCH

P1343

Location:

The DAY/NIGHT switch is located inside the dis-

penser drawer on the right front of the control panel.
Test Procedures:

1.  Disconnect the dispenser from the power source.

2.  Disconnect the white/green wire from the switch 

and the white/black wire from contactor located on 

the outside bottom of the component bracket .

3.  With  a  voltmeter,  check  the  voltage  across  the 

white/green and the white/black  and the ”ON/OFF“ 

switch in the “ON” position. Connect the dispenser 

to the power source. The indication must be:

 

a) 120 volts ac for 120 volt models.

 

b) 230 volts ac for 230 volt models.

4.  Disconnect the dispenser from the power source.

If voltage is present as described, reconnect the white/

black wire to the contactor and proceed to #5.

If voltage is not present as described, refer to the Wiring 

Diagram and check the dispenser wiring harness.

5.  Remove the white/red wire from the transformer.

6.  With the DAY/NIGHT switch in the “DAY” position 

check for continuity across the terminals. Continu-

ity must not be present when the switch is in the 

“NIGHT” position.

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