Bunn TB3 用户指南

Page 24

FIG.17 ON/OFF SWITCH TERMINALS

P1282

BLK to Power Cord (100V & 
120V Models
BLK to Power Connector 
(230V Models)

WHI/VIO to Dilution 
Timer

WHI/VIO

WHI/VIO to Brew 
Timer TL1

WHI to Dilution Timer TL2 
(100V & 120V Models)
RED to Dilution Timer (230V 
Models)

37235  050205

FIG. 16 ON/OFF SWITCH

P3034

Location:

The ON/OFF switch is located in the front of the 

hood, above and to the left of the brew funnel.

Test Procedure:
Brewers W/Out Half Batch Option
1.  Disconnect the brewer from the power source.
2.  Remove the black and white/violet wires from the 

switch terminals.

3.  With a voltmeter, check the voltage across the 

black wire removed from the ON/OFF switch and 
the white wire remaining on the switch terminal.

4.  Connect the brewer to the power source. The 

indication must be:

 

a) 120 volts ac for two wire 120 volt models.

 

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

 

c) 100 volts ac for two wire 100 volt models.

5.  Disconnect the brewer from the power source.

If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.

6.  Check for continuity across the center and end 

terminals of the top row when the switch is in the 
“ON” position.

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

Removal and Replacement:
1.  Remove the wires from the switch terminals.
2.  Compress the clips inside the hood and gently 

push the switch through the opening.

3.  Push the new switch into the opening and spread 

the clips to hold the switch captive in the hood.

4.  Refer to FIG. 17 when reconnecting the wires.