Bunn TU3Q service manual OFF/SELECTOR Switch

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SERVICE (cont.)

OFF/SELECTOR SWITCH (SWEETENER OPTION)

P2845.40

FIG. 20 OFF/SELECTOR SWITCH

Location:

The OFF/SELECTOR switch is located in the front of the hood, above and to the left of the brew funnel.

Test Procedure:

5.Disconnect the black and white wires from the center terminals.

6.Disconnect the brown/white and white/violet wires from the right side terminals.

7.Check for continuity across the center and right terminals in rows one through four when the switch is in the "SWEETÓ position.

If continuity is present as described, replace the wires on the right side and proceed to #8.

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

8.Disconnect the white/violet wires on the left side terminal.

9.Check for continuity across the center and left side terminals in rows one through four when the switch is in the "UNSWEETÓ 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. 21 when reconnecting the wires.

1.Disconnect the brewer from the power source.

2.With a voltmeter, check the voltage across the black wire and white wire on the selector switch.

3.Connect the brewer to the power source. The in- dication must be:

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

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

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

4.Disconnect the brewer from the power source.

If voltage is present as described, proceed to #5.

WHT/GRN to Brew Sol

WHT/VIO to Brew Timer TL1

BLK to Power Cord

BRN/WHI to

Sweetener Sol

WHT to Power Cord

P1763

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

FIG.21 OFF/SELECTOR SWITCH TERMINALS

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Contents Phone 217 529-6601 FAX 217 TU3QBUNN-O-MATIC Commercial Product Warranty ContentsIntroduction #00831.0000 #00656.0000 User Notices#03408.0002 #03409.0002 #03408.0000 #03536.0000 #03409.0000 Plumbing Requirements Electrical RequirementsElectrical Hook-Up Auto Sweetener SET-UP Initial SET-UPAuto Sweetener SET-UP Adjusting Brew VolumesAuto Sweetener Cleaning CleaningOperating Controls TEA Brewing Problem Probable Cause TroubleshootingRemedy Problem TroubleshootingProbable Cause RemedyProblem Probable Cause Dripping from sprayhead Beverage overflows dispenser Brew TimerSyphon System Lime Build-up DispenserProblem Probable Cause Remedy Component Access ServiceTest Procedures Disconnect the brewer from the power source ServiceBrew Solenoid Valve Solenoid valveWiring Diagram and check the wiring harness Brew Timer Early ModelsIf voltage is as described, proceed to #7 Service Digital Brew Timer Late ModelsDigital Timer Wiring Control Thermostat Control ThermostatLimit Thermostat Limit ThermostatRefer to when reconnecting the wires Location ON/OFF SwitchSwitch terminals On the switch terminalStart Switch Start SwitchTank Heater Sweetener Solenoid Valve Optional OFF/SELECTOR Switch Volts AC 2 Wire Single Phase Schematic Wiring Diagram TU3QVolts AC Wire