Bunn SA service manual ON/OFF SWITCH Models ST, STA, STF & STFA, SERVICE cont

SERVICE (cont.)

ON/OFF SWITCH (Models ST, STA, STF & STFA)

P1589

FIG. 6 ON/OFF SWITCH

Location:

The ON/OFF switch is located second from right on the switch panel.

Test Procedure:

1.	Disconnect the brewer from the power source.
2.	Viewing the switch from the back remove the
	white or red wire from the upper terminal and the

5.With the black wire removed, remove from the lower terminal the white/red wire for the lower warmer switch, the brown/black wire for the top front warmer switch or the blue/black wire for the top rear switch.

6.Check for continuity across the center and lower terminal with the switch in the "ON" position. Continuity must not be present when the switch is in the "OFF" position.

If continuity is present as described, reconnect the black wire to the center terminal and the white/red to the lower terminal.

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 switch panel and gently push the switch through the opening.

3.Push the new switch into the opening and spread the clips to hold switch in the switch panel .

4.Refer to FIG. 7 when reconnecting the wires.

black wire from the center terminal.

3. Check the voltage across the white or red wire

and the black wire with a voltmeter. Connect the

brewer to the power source. The indication must

be:

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

three wire 120/240 volt models.

b) 200 to 240 volts ac for two wire 200 or 240 volt

models.

BLK to Terminal

Block (Black

Insert)

WHI/VIO to

Lower Warmer BRN/BLK to Top Front Warmer BLU/BLK to Top Rear Warmer

WHI to Terminal Block (White Insert on 120/ 208V or 120/240V Models)

RED to Terminal Blck (Red Insert on 200V or 240V Models)

P1590

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

4. Disconnect the brewer from the power source.

If voltage is present as described, reconnect the white or red wire and proceed to #5.

If voltage is not present as described, refer to the Wiring Diagrams and check the brewer wiring har- ness.

FIG. 7 ON/OFF SWITCH TERMINALS

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