Bunn TWIN service manual Service ON/OFF Switches Model CEZ

Page 26

SERVICE (cont.)

ON/OFF SWITCHES - Model CEZ

 

 

 

 

R

 

 

 

T-SID

E-REA

 

 

FRON

 

 

 

 

 

 

 

RT

 

 

 

 

STA

 

 

 

 

WER

 

 

 

 

ON/LO

 

 

 

 

R

 

 

 

 

E-REA

 

 

 

 

T-

 

 

 

 

FRON

 

 

 

E

RT

 

 

 

 

STA

 

 

 

 

WER

 

 

 

 

ON/LO

 

 

 

N

 

 

 

NE

 

 

 

 

FUN ARE

URE

 

 

 

FAIL

 

 

 

 

 

 

 

FIG. 5 ON/OFF SWITCHES

 

P1876

 

 

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.If switch to be removed is in the left control panel and brewer is equipped with a faucet, turn off water supply and remove faucet.

2.Remove front end cap

3.Remove the wires from the switch terminals.

4.Compress the clips inside the hood and gently push the switch through the opening.

5.Push the new switch into the opening and spread the clips to hold switch in the hood.

6.Refer to FIG. 6 when reconnecting the wires.

7.Replace front end cap and faucet (if removed).

Location:

The ON/OFF switches are located on the front of

 

 

 

 

 

 

 

 

the hood.

 

 

WHI to Terminal Block (White

 

 

 

Insert on 120V or 120/240V

Test Procedure:

 

 

Models)

1. Disconnect the brewer from the power source.

 

 

RED to Terminal Block (Red

 

 

Insert on 200V or 230V

2. Viewing the switch from the back remove the white

 

 

 

 

Models)

wire from the upper terminal and the black wire

 

 

BLK to Terminal Block (Black

from the center terminal.

 

 

3. With a voltmeter, check the voltage across the

 

 

Insert)

white wire and the black wire. Connect the brewer

 

 

Terminal #1 (See chart below)

to the power source. The indication must be 120

 

 

 

 

 

 

volts ac.

 

 

 

P1918

4. Disconnect the brewer from the power source.

Connect wire to Terminal #1 as follows:

 

If voltage is present as described, reconnect the white

Brew Station Warmers

 

WHI/RED

wire and proceed to #5.

............................................

 

 

 

 

If voltage is not present as described, refer to the

Side Warmers

 

 

Wiring Diagrams and check the brewer wiring har-

(Front)

BRN/BLK

ness.

(Rear)

VIO

 

FIG. 6 ON/OFF SWITCH WIRING

 

 

 

 

 

 

 

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.

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29319 091203

 

Page 25 Page 27
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Contents CEZ Cdbc Twin Contents IntroductionUser Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Additional Warmer Switches ON/OFF SwitchBrew Switch Ready IndicatorCoffee Brewing CleaningInitial SET-UP CEZ Adjustments & Optional Settings Displaying Brew Temperature Cdbc Adjustments & Optional SettingsSetting Brew Temperature Setting Brew LockoutAdjusting Brew Volumes Pulse Brew Setup Procedure Cdbc Twin & Cdbcf Twin Troubleshooting Before troubleshooting this brewer, check for the followingProbable Cause TroubleshootingRefill Circuit Problem RemedyProblem Probable Cause Remedy Heating Circuit Problem Probable Cause Remedy Ings are taken 4b. Temperature Probe CEZ Remove the probe from3 of the J5 connector. At Control boardSet the temperature to 200F 4 of the J3 connector. At2b. Temperature Probe CEZ Remove the probe from Bilize. If temperature in tank isBrewing Circuit Problem Brew cycle will not startTroubleshooting Brewing Circuit Probable Cause Remedy Switch Move the two wires. Check forSupply and check wiring Holes are clear and unobDiagnostics Cause Things to CheckContents ServiceComponent Access Service PC Control Board Model Cdbc Disconnect the 11-pin connector from the control panelService PC Control Board Model CEZ Control Boards CEZService Switch Panel Model Cdbc Switch Panels CdbcService ON/OFF Switches Model CEZ Minals when the switch is released Service Brew Switch Start Model CEZBottom switch terminal Service Dispense ValveLimit Thermostat Limit ThermostatsTank Heaters Tank HeaterService Tank Heaters Tank Heater WiringRefill Valve Check for continuity across the refill valve coil terminalsWarmer Elements Warmer ElementsSchematic Wiring Diagram CEZ Twin 0/6 Left Schematic Diagramwiring Twincdbc Schematic Wiring Diagram Cdbc Twin 2/2 Right
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TWIN specifications

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