Bunn CRT5, CRTF5 service manual ON/OFF Warmer Switch, Lower Center Warmer

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SERVICE (cont.)

ON/OFF WARMER SWITCH

P939

FIG. 6 ON/OFF WARMER SWITCHES

Location:

The ON/OFF switch(s) are located on the front of the hood.

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 black wire from the center terminal.

3.Check the voltage across the white wire 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.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.

5.With the black wire removed, remove the wire from the lower terminal.

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 remaining wire 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 hood 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 hood.

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

WHI to Terminal Block (White Insert on 120V or 120/240V Models) RED to Terminal Block (Red Insert on 200V or 240V)

BLK to Terminal Block (Black Insert)

WHI/RED to Lower Center Warmer

LOWER CENTER WARMER

WHI to Terminal Block (White In- sert on 120V or 120/240V Models) RED to Terminal Block (Red Insert on 200V or 240V

BLK to Terminal Block (Black Insert)

YEL to Left Front Warmer

LEFT FRONT WARMER

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

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

BLK to Terminal Block (Black Insert)

WHI/VIO to Left Rear Warmer

LEFT REAR WARMER

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

RED to Terminal Block (Red Insert on 200V or 240V

BLK to Terminal Block (Black Insert)

BRN/BLK to Right Front Warmer

RIGHT FRONT WARMER

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

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

BLK to Terminal Block (Black Insert)

VIO to Right Rear Warmer

RIGHT REAR WARMER

P1257.50

FIG. 7 ON/OFF WARMER SWITCH TERMINALS

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Contents Bunn CRT5 Introduction WarrantyUser Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Models CRT5, CRT5A & CRT5B Plumbing RequirementsModels CRTF5 & CRTF5B Models CRTF5, CRTF5A & CRTF5BInitial SET-UP Adjusting Brew VolumesON/OFF Switch CleaningStart Switch Operating ControlsProblem Probable Cause TroubleshootingBrew cycle will not start No water To the brewerProblem TroubleshootingBrew cycle will not start Water is not hot Control Thermostat Tank HeaterSyphon System Inconsistent beverage levelDispenser Spitting or excessive steaming Dripping from sprayhead Plumbing Lines Water Supply Dry coffee grounds remainFunnel Brewer is making unusal noises See Tank Heater WarmerComponent Access ServiceContents Control ThermostatFirst Type Thermostat Second Type Thermostat Service Control ThermostatLimit Thermostat ServiceLower Center Warmer ON/OFF Warmer SwitchSolenoid Valve Test Procedures Disconnect the brewer from the power sourceStart Switch Thermostat w/bracket early models only Tank HeaterTank Heater Terminals Service Tank HeaterTank Heater Switch Tank Heater SwitchTank Heater Switch Terminals Service Tank Heater SwitchThermal CUT-OFF Service Thermal CUT-OFF Brewers W/FaucetDisconnect the black and white wires from the solenoid Service Timer Early ModelsTest Procedure Disconnect the brewer from the power source Timer Terminals Service TimerIf voltage is as described, proceed to #8 Service Digital Brew Timer Late ModelsSetting brew volumes. To set a brew volume Service Digital Brew Timer Late ModelscontTo increase a brew volume, place the ON/OFF Warmer Elements Warmer Elements10478 10478 10478

CRT5, CRTF5 specifications

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