Bunn TWIN Ings are taken, Control board, 4b. Temperature Probe CEZ Remove the probe from

Page 15

TROUBLESHOOTING (cont.)

 

 

 

 

 

 

HEATING CIRCUIT

 

 

 

 

 

 

PROBLEM

 

PROBABLE CAUSE

 

REMEDY

Water does not heat to proper

4a. Temperature Probe (CDBC)

A) Remove the probe from the

temperature (cont.)

 

 

grommet and submerge in a water

IMPORTANT: Make sure no tem-

 

 

bath of approximately 70°F(21°C).

 

 

Connect an ohmmeter to pins 3

perature tests are taken before the

 

 

and

4 of the J3 connector. At

ready light is "ON". Tank tempera-

 

 

60

°

 

°

ture must be stabilized before read-

 

 

 

F(16 C) the reading should be

 

 

15.3k ± 2k OHMS, at 70°F(21°C)

ings are taken.

 

 

 

 

the reading should be 11.8k ± 2k

 

 

 

 

 

 

 

 

OHMS, and at 80°F(27°C) the read-

 

 

 

 

ing should be 9.3k ± 2k OHMS. If

 

 

 

 

the probe is within these param-

 

 

 

 

eters, reconnect the J3 plug to the

 

 

 

 

control board.

 

 

4b. Temperature Probe (CEZ)

B) Remove the probe from the

 

 

 

 

grommet and submerge in a water

 

 

 

 

bath of approximately 70°F(21°C).

 

 

 

 

Connect an ohmmeter to pins 2

 

 

 

 

and 3 of the J5 connector. At

 

 

 

 

60°F(16°C) the reading should be

 

 

 

 

15.3k ± 2k OHMS, at 70°F(21°C)

 

 

 

 

the reading should be 11.8k ± 2k

 

 

 

 

OHMS, and at 80°F(27°C) the read-

 

 

 

 

ing should be 9.3k ± 2k OHMS. If

 

 

 

 

the probe is within these param-

 

 

 

 

eters, reconnect the J5 plug to the

 

 

 

 

control board.

 

 

5. Limit Thermostat (CDBC & CEZ)

Disconnect the brewer from the

 

 

 

 

power source. Check for continu-

 

 

 

 

ity across the limit thermostat ter-

 

 

 

 

minals. Continuity should be

 

 

 

 

present. If not replace the limit

 

 

 

 

thermostat.(See page 28)

 

 

6. Tank Heater (CDBC & CEZ)

Disconnect the brewer from the

 

 

 

 

power source. Check for continu-

ity between the white terminal of the terminal block and the black wire on the relay on the control board. There should be a low OHM reading. If no continuity is present, check for a wiring problem, then replace the tank heater if no wiring problem is found.(See page 29)

Spitting or excessive steaming

1. Lime build up on temperature

 

probe, tank or tank heater

 

Page 15

Inspect probe and tank assembly for excessive lime deposits. Delime as required.

29319 091203

Page 14 Page 16
Image 15
Page 14 Page 16
Contents CEZ Cdbc Twin Introduction ContentsUser Notices Electrical Requirements Plumbing RequirementsElectrical Hook-Up Ready Indicator ON/OFF SwitchBrew Switch Additional Warmer SwitchesCleaning Initial SET-UPCoffee Brewing CEZ Adjustments & Optional Settings Setting Brew Lockout Cdbc Adjustments & Optional SettingsSetting Brew Temperature Displaying Brew TemperatureAdjusting Brew Volumes Pulse Brew Setup Procedure Cdbc Twin & Cdbcf Twin Before troubleshooting this brewer, check for the following TroubleshootingRemedy TroubleshootingRefill Circuit Problem Probable CauseProblem Probable Cause Remedy Heating Circuit Problem Probable Cause Remedy Control board 4b. Temperature Probe CEZ Remove the probe from3 of the J5 connector. At Ings are takenBilize. If temperature in tank is 4 of the J3 connector. At2b. Temperature Probe CEZ Remove the probe from Set the temperature to 200FBrew cycle will not start Brewing Circuit ProblemTroubleshooting Brewing Circuit Probable Cause Remedy Holes are clear and unob Move the two wires. Check forSupply and check wiring SwitchCause Things to Check DiagnosticsService Component AccessContents Disconnect the 11-pin connector from the control panel Service PC Control Board Model CdbcControl Boards CEZ Service PC Control Board Model CEZSwitch Panels Cdbc Service Switch Panel Model CdbcService ON/OFF Switches Model CEZ Service Brew Switch Start Model CEZ Bottom switch terminalMinals when the switch is released Dispense Valve ServiceLimit Thermostats Limit ThermostatTank Heater Tank HeatersTank Heater Wiring Service Tank HeatersCheck for continuity across the refill valve coil terminals Refill ValveWarmer 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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Manual 39 pages 50.34 Kb

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.

The design of the TWIN,ITB is user-friendly and intuitive. It includes an easy-to-read LED display that simplifies programming and monitoring of the brewing process. This streamlined interface enables baristas to adjust settings quickly and efficiently, significantly reducing wait times for customers. Additionally, the unit's low-profile design enables it to fit seamlessly into various kitchen layouts and countertops, optimizing valuable space.

Durability and reliability are at the forefront of the Bunn TWIN,ITB's construction. Built with high-quality materials, the brewer is designed to withstand the rigors of intense daily use. Its stainless-steel finish not only provides a sleek and professional appearance but also makes it easy to clean and maintain, ensuring longevity and excellent performance throughout its lifespan.

Furthermore, the TWIN,ITB features an impressive water capacity with a built-in hot water tank. This allows users to brew large batches of coffee without interruption and offers instant hot water for tea, soups, or other hot beverages. The efficient brewing system utilizes pre-infusion technology, which saturates the coffee grounds before extraction, enhancing the overall flavor and aroma of the brewed coffee.

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.
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