Bunn TWIN service manual Heating Circuit Problem Probable Cause Remedy

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TROUBLESHOOTING (cont.)

HEATING CIRCUIT

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Water does not heat to proper

1. Display flashing (CDBC) or

Brewer has shut down due to

temperature

ready light flashing (CEZ)

malfunction (See Diagnostic

IMPORTANT: Make sure no tem-

 

 

Chart in manual, Page 20, or

 

 

under top lid).

perature tests are taken before the

 

 

 

ready light is "ON". Tank tempera-

2. Water not touching tempera-

Remove probe and grommet. Look

ture must be stabilized before read-

ture probe

into hole on tank lid. Water must

ings are taken.

 

 

be within one inch from top of

 

 

 

 

tank.

 

 

3a. Dry Plug In Probe Sensing

A) Disconnect the brewer from the

 

 

System (CDBC)

power source. Disconnect the J3

 

 

 

 

connector from the control board.

 

 

 

 

Check for continuity from the tank

 

 

 

 

mounting screw where the green

 

 

 

 

wire mounts, to pin 2 of the plug,

 

 

 

 

continuity should be present. Pull

 

 

 

 

the temperature probe up about

 

 

 

 

an inch from the grommet. Check

 

 

 

 

for continuity from the outside

 

 

 

 

surface of the temperature probe

 

 

 

 

and pin 4 of the plug, continuity

 

 

 

 

should be present. Connect the J3

 

 

 

 

plug to the control board and pro-

 

 

 

 

ceed to step 4a.

 

 

3b. Dry Plug In Probe Sensing

B) Disconnect the brewer from the

 

 

System (CEZ)

power source. Disconnect the J5

 

 

 

 

connector from the control board.

 

 

 

 

Check for continuity from the tank

 

 

 

 

mounting screw where the green

 

 

 

 

wire mounts, to pin 5 of the plug,

 

 

 

 

continuity should be present. Pull

 

 

 

 

the temperature probe up about

 

 

 

 

an inch from the grommet. Check

 

 

 

 

for continuity from the outside

 

 

 

 

surface of the temperature probe

 

 

 

 

and pin 2 of the plug, continuity

 

 

 

 

should be present. Connect the J5

 

 

 

 

plug to the control board and pro-

 

 

 

 

ceed to step 4b.

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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

The Bunn TWIN,ITB is a remarkable coffee brewing system designed for commercial use, aimed at establishments that require a high volume of coffee while maintaining superior quality. This innovative brewer stands out through its dual brewing capability, allowing users to brew two different types of coffee simultaneously. This feature is particularly beneficial for cafes, restaurants, and other food service locations where diverse customer preferences must be met efficiently.

One of the main features of the Bunn TWIN,ITB is its advanced brewing technology. The system utilizes Bunn's patented brewing process, ensuring optimal coffee extraction and flavor profile every time. It employs a digitally controlled brew timer and state-of-the-art heating elements, providing precise temperature control essential for achieving the ideal brew. This technology allows for consistent results, ensuring that each cup meets the high standards expected in a commercial setting.

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In summary, the Bunn TWIN,ITB is an exceptional choice for any commercial establishment looking to provide high-quality coffee efficiently. Its dual brewing capabilities, advanced technologies, user-friendly design, durability, and additional features make it a valuable addition to any coffee service operation. Whether busy mornings or afternoon rushes, this brewer ensures that every cup of coffee meets the high standards of taste and quality that customers expect.