Bunn JDF-4D Manual De Usuario

47

FIG. 68 TEMPERATURE SENSOR

FIG. 67 TEMPERATURE SENSOR

Location:

The Temperature Sensor is located inside the cabinet 

between the fan and the water coil.

Test Procedures:

1.  Remove the left side housing panel.

2.  Connect a voltmeter across the two leads of the 

temperature sensor (leave plug connected);

 

The indication must be:

 

a) Approx. 1.4 vdc @ 71° F

 

b) Approx. 2.6 vdc @ 32° F

If voltage reading is 0v, the Control Board is not sup-

plying the necessary 5v and should be replaced. If the 

reading stays at 5vdc, replace sensor.

Alternate Test:

2.  Disconnect the plug on sensor leads and check 

resistance as indicated in chart.

If resistance reading is not within the range listed in 

chart, replace sensor.

Removal and Replacement:

1.  Remove the left side housing panel.

2.  Disconnect the plug on the temperature sensor 

leads from the connector on the dispenser main 

harness.

3.  Open the cabinet door and remove the product 

containers.

4.  Remove the cabinet fan and fan guard assembly.

5.  Clip off the connector and pull the temperature 

sensor from the top left rear of the cabinet and 

discard.

6.  Push new temperature sensor wires into the grom-

met at the top left rear of the cabinet and secure to 

sensor mounting clip.

7.  Refer to Fig. 68 and connect the wires to the new 

plug.

8.  Connect the sensor plug to the connector from the 

main harness.

9.  Reinstall the cabinet fan and guard assembly.

10. Reinstall the left side housing panel.

1.  BLK to GRY J7-1

  (Control Board) Positive

2.  BLK to WHI/BLK J7-2

  (Control Board) Negative

2        1

 

  SHORTED 

0 Ω 

0VDC

 

32° F 

1.5k Ω 

2.5VDC

 

   0° C

 

77° F 

350 Ω 

1.1VDC

  25.0° C

 

OPEN 

INFINITE 

5.0VDC

NOTE: ALL FIGURES LISTED ABOVE ARE APPROXIMATE.

49179  020514