Bunn CDBC, CEZF service manual Service, Control Board

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SERVICE (cont.)

CONTROL BOARD - Model CDBC-APS/TC/TS/TSR

P1914

FIG. 2 CONTROL BOARD

Location:

The Control Board is located inside the top cover behind the front end cap.

Test Procedures:

The test procedures for the control board will vary depending upon the problems experienced by the brewer. Refer to the Troubleshooting guide beginning on page 9. The troubleshooting guide is divided into three sections, Refill Circuit, Heating Circuit, and Brew- ing Circuit.

Removal and Replacement:

1.Disconnect the black wire and blue wire from the relay on the control board.

2.Disconnect the 10-pin connector and the 4-pin connector from the main wiring harness.

3.Disconnect the 11-pin connector from the control panel.

4.Remove the four #6 screws and four nylon wash- ers and the two #4-40 screws securing the control board to the end cap assembly.

5.Install a new control board and secure with the four #6 screws and nylon washers and the two #4- 40 screws to the end cap assembly.

NOTE: The four nylon washers must be installed under the heads of the four #6 screws to prevent a possible shorting of the control board circuits.

6.Connect the 11-pin connector from the control panel.

7.Connect the 10-pin connector and the 4-pin con- nector from the main wiring harness.

8.Connect the blue wire and black wire to the relay on the control board.

9.Refer to CDBC-APS/TC/TS/TSR Adjustments and Optional Settings to program the new control board.

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Contents Post Office BOX SPRINGFIELD, Illinois Phone 217 FAX 217Contents IntroductionUser Notices Plumbing Requirements Electrical RequirementsElectrical Hook-Up Ready Indicator ON/OFF SwitchBrew Switch Operating ControlsInitial SET-UP CleaningCoffee Brewing CEZ-APS/TS/TSR Adjustments & Optional Settings Adjusting Brew VolumesDisplaying Brew Temperature CDBC-APS/TC/TS/TSR Adjustments & Optional SettingsSetting Brew Temperature Setting Brew LockoutWater Sensing Threshold Adjustment Procedure CDBC-APS/TC/TS/TSR Adjustments & Optional SettingsTroubleshooting Before troubleshooting this brewer, check for the followingProbable Cause TroubleshootingRefill Circuit Problem RemedyTroubleshooting Refill Circuit 2a. Water Level Probe Sensing System CDBC-APS/TS/TSRWater does not heat to proper temperature Heating Circuit Problem Probable Cause RemedyWater not touching temperature probe Troubleshooting Heating Circuit Problem Probable Cause RemedyReplace the control board.See ContControl Board Cdbc & CEZ Pages 21Brewing Circuit Problem Probable Cause Troubleshooting Brewing Circuit Dripping from sprayhead Lime build up Water temperatureSet-upinstructions RequiredDry coffee grounds remain Sprayhead Funnel Problem Probable CauseFunnel loading Diagnostics Cause Things to CheckComponent Access ServiceContents Service Control BoardService Control Board Model CEZ-APS/TS/TSR Control BoardService Switch Panel Model CDBC-APS/TC/TS/TSR Switch PanelON/OFF Switch Wiring Service Brew Switch Start Model CEZ-APS/TS/TSR Brew Switch WiringDispense Valve Dispense ValveLimit Thermostat Limit ThermostatTank Heater Tank HeaterService Tank Heater Tank Heater WiringRefill Valve Check for continuity across the refill valve coil terminals120V AC 2 Wire 120/208V AC 3 Wire 120/240V AC 3 Wire Levelsingle PhaseSchematic Wiring Diagram CEZ-APS/TS/TSR 120V AC 2 Wire Cdbc 15, 20 & 35 APS/TC/TS

CEZF, CDBC specifications

The Bunn CEZF and CDBC are two popular commercial coffee brewers offered by Bunn, a leader in the coffee equipment industry. Both models are designed to meet the demands of high-traffic settings such as cafes, restaurants, and other foodservice establishments. They combine advanced technology with user-friendly features to ensure consistent, high-quality coffee with minimal effort.

The Bunn CEZF model is known for its easy-to-use design and efficiency. One of its standout features is the "Digital Brewer" control, which allows operators to adjust brewing parameters such as brew time and water temperature. This level of customization enables baristas to consistently create the perfect cup of coffee tailored to their specific blends. Furthermore, the CEZF has a unique "intelligent" warming plate that maintains the optimal serving temperature without over-extraction, ensuring that each cup of coffee remains flavorful.

On the other hand, the Bunn CDBC incorporates a dual brewing capacity that allows for larger batches of coffee to be made simultaneously. This feature is particularly beneficial in high-demand environments where quick service is essential. The CDBC also utilizes a patented brew control technology, enabling users to select their brew strength with just a few button presses. This flexibility is complemented by its high-performance heating element, which heats water rapidly, ensuring that coffee is brewed at the ideal temperature for optimal extraction.

Both models are equipped with a large water reservoir, ensuring a continuous supply of hot water for brewing. They also feature high-quality stainless steel constructions that enhance durability and make cleaning easier. The intuitive interface on both models simplifies operation, with clear instructions that allow even novice users to brew exceptional coffee right away.

In terms of safety, both the CEZF and CDBC are designed with auto shut-off features and integrated safety protocols, minimizing the risk of overheating and ensuring a secure brewing environment.

Overall, the Bunn CEZF and CDBC are excellent choices for any commercial kitchen or café looking to serve high-quality coffee efficiently. Their advanced features, durability, and ease of use make them top contenders in the commercial brewing category.
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