Bunn CDS-3 User Manual

SERVICE (cont.)

CONTACTOR - ELECTRONIC CONTROL

6. Disconnect the black wires from contactor termi-

nals #6 & #8 (#5 & #6, CDS-3 first type contac-

tor).

7. With ON/OFF switch in the “ON” position, connect

the dispenser to the power source and check for

continuity across terminals on contactor.

If continuity is not present as described, on CDS-3 first

type contactors, replace contactor. If continuity is not

present between terminals #6 & #8 as described on all

CDS-2 contactors and CDS-3 second type contactors,

check for continuity across terminals #2 and #4.
If continuity is present as described, disconnect the

dispenser from power source and reconnect black

wires to terminals #2 and #4, the contactor will oper-

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

contactor.
Removal and Replacement:

1. Disconnect the wires from the contactor.

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

the contactor to the component bracket. Remove

and discard contactor.

3. Install the new contactor on the component bracket

using two #8-32 locking screws.

4. Refer to Fig. 22 and reconnect the wires.

FIG. 22 CONTACTOR TERMINALS

P1333

FIG. 21 CONTACTOR - ELECTRONIC CONTROL

Location:

The contactor is located inside the dispenser chas-

sis on the lower outside of the component bracket.
Test Procedures:

1. Disconnect the dispenser from the power

source.

2. Disconnect white/black wire from contactor termi-

nal #0 (terminal #2, on CDS-3 first type contactor)

and brown/black from terminal #1.

3. With a voltmeter, check the voltage across the

white/black wire and the brown/black wire 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, proceed to #5.

If voltage is not present as described, refer to the

Wiring Diagram and check the dispenser wiring har-

ness.

5. Check for continuity across contactor terminals

#0 & #1 (#1 & #2, CDS-3 first type contactor).

If continuity is present as described reconnect the

white/black wire and the brown/black wire to the

contactor and proceed to #6.

If continuity is not present as described, replace the

contactor.

P1342

ALL CDS-2 CONTACTORS

CDS-3 SECOND TYPE CONTACTORS

CDS-3 FIRST TYPE CONTACTORS

27646 122200

Terminal #0

WHI/BLK from Main Harness/

Power Cord/Compressor

Terminal #1

BRN/BLK from Main

Harness/Control Board

Terminal #6

BLK from Main

Harness/Power Cord

Terminal #8

BLK from Compressor

Harness

Terminal #2

Terminal #4