Bunn JDF-4SB Manual De Usuario

SERVICE (CONT.)

Transformer - Lited Doors (JDF-2S, JDF-4S)

Removal and Replacement:

1. Loosen the two #8-32 screws securing the com-

ponent bracket to the dispenser housing base.

2. Pull component bracket out the front of the dispenser

far enough so the transformer connector can be

disconnected from the main wiring harness.

3 Disconnect the transformer four pin connector from

the four pin plug on the main wiring harness.

4. Remove the two #6-32 keps nuts securing the

transformer to the component bracket.

5. Remove and discard the transformer.

6. Install new transformer on the component bracket

and secure with two #6-32 keps nuts.

7. Connect the four pin connector on the transformer

to four pin plug on the main wiring harness.

8. Place the component bracket into position and

tighten the two #8-32 screws.

WHI/BLK - T12

WHI/GRN - T8

WHI - 120V T2, 240V T6

BLK - TI

FIG. 72 TRANSFORMER TERMINALS

P1647

FIG. 71 TRANSFORMER

Location:

The transformer is located on the electrical com-

ponent mounting bracket on the lower front of the

dispenser behind the splash panel.

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Disconnect the four pin plug from the main harness

from the four pin connector on the transformer.

3 Check the voltage across black wire pin 1 and the

white wire pin 2 on the plug from the main har-

ness. Connect the dispenser to power source. The

indication must be:

a) 120 volts ac for two wire 120 volt models, three

wire 120/208 volt and three wire 120/240 volt

models.

b) 240 volts ac for two wire 240 volt models.

c) 230 volts ac for two wire 230 volt models.

4. Disconnect the dispenser from the power source.

If voltage is present as described reconnect the plug

and the connector and proceed to #5.

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

Diagrams and check the main wiring harness.

5. Check the voltage between J3-5 and J3-6 on the

six pin connector at the control board. Connect the

dispenser to the power source. The indication must

be 24 volts ac.

If voltage is present as described the transformer is

operating properly.

If voltage is not present as described, replace the

transformer.

P3864

49179 110613