Bunn DV User Manual download pdf (Page 17)

Steam Sensor (Thermistor)

Location:

The thermistor is located on the end of the overﬂ ow

tube above the overﬂ ow cup.

To test the thermistor, access will also be needed to

the electronic control board.

SERVICE (cont.)

P1993

FIG. 17b LOCATION

H 10X

P1993

FIG. 17a LOCATION

H 5X

Test Procedure:

1. Disconnect the dispenser from the power source.

2. Disconnect the thermistor from J5 on control

board.

3. Check the resistance across thermistor with a

ohmmeter. The resistance range is approximately

9K @ room temperature to approximately 2K @

200°F.

4. Disconnect the dispenser from the power source.

If resistance was present as described, the thermistor

is working.

If resistance was not present as described, replace the

control board.

Removal and Replacement:

1. Disconnect the dispenser from the power source.

2. Disconnect the thermistor from J5 on control

board.

3. Loosen the set screw and the two screws securing

the two half blocks together. Remove thermistor

assembly from overﬂ ow tube.

4. Install new thermistor on tube and slide down until

it contacts the ﬂ ared end. NOTE: It’s critical that

the thermistor be centered directly under the tube

opening.

5. Snug the set screw so the block assembly does not

move aroung easily.

6. Connect the thermistor to J5 on control board.

NOTE: DO NOT TEST OPERATION WITH PANELS

REMOVED, AS AIR MOVEMENT CAN HINDER

PROPER READINGS ON THERMISTOR.

Thermistor centered

under tube opening

FIG. 17d THERMISTOR POSITION

42311 080510

Set screw

Mounting screws

DO NOT BEND

THERMISTOR

UP/DOWN

FIG. 17c STEAM SENSOR EXPLODED

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 23 24

Comments to this Manuals

No comments

Bunn DV User Manual Page 17

Comments to this Manuals

Related products and manuals for Coffee machines Bunn DV