Bunn CEZF, CDBC service manual Service Control Board Model CEZ-APS/TS/TSR

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SERVICE (cont.)

CONTROL BOARD - Model CEZ-APS/TS/TSR

J3

J4

J6

P1915

FIG. 3 CONTROL BOARD

Location:

The Control Board is located inside the trunk behind the front access panel.

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 8-pin connector and the 6-pin connector from the main wiring harness.

3.Disconnect the 2-pin connector from the ready indicator LED.

4.Remove the four #6-32 screws securing the con- trol board to the component mounting bracket.

5.Remove the four spacers from the control board and attach them to the new board.

6.Locate J6 connector on control board. If jumper is across pins 1 & 2, board is set to operate tea brewer or a brewer that DOES NOT use a water level probe. If jumper is across pins 2 & 3, board is set to operate a coffee brewer or a brewer that uses a water level probe. Look at the bottom side of the control board. Pin 1 of connector J6 is marked by a square solder pad and pins 2,3 & 4 are round.

7.Check the jumper on the brew temperature lock- out jack for desired function (enabled or disabled).

8.Check the jumper on the temperature jack for

desired brew temperature. The factory setting should be 200°F(95°C)

9.Install a new control board and secure with the four #6-32 screws to the component mounting bracket.

10.Connect the 2-pin connector from the ready indi- cator LED.

11.Connect the 8-pin connector and the 6-pin con- nector from the main wiring harness.

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

13.Refer to CEZ-APS/TS/TSR Adjustments and Op- tional Settings to program the new control board.

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Contents Phone 217 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction ContentsUser Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Operating Controls ON/OFF SwitchBrew Switch Ready IndicatorCoffee Brewing CleaningInitial SET-UP Adjusting Brew Volumes CEZ-APS/TS/TSR Adjustments & Optional SettingsSetting Brew Lockout CDBC-APS/TC/TS/TSR Adjustments & Optional SettingsSetting Brew Temperature Displaying Brew TemperatureCDBC-APS/TC/TS/TSR Adjustments & Optional Settings Water Sensing Threshold Adjustment ProcedureBefore troubleshooting this brewer, check for the following TroubleshootingRemedy TroubleshootingRefill Circuit Problem Probable Cause2a. Water Level Probe Sensing System CDBC-APS/TS/TSR Troubleshooting Refill CircuitWater not touching temperature probe Heating Circuit Problem Probable Cause RemedyWater does not heat to proper temperature Problem Probable Cause Remedy Troubleshooting Heating CircuitPages 21 ContControl Board Cdbc & CEZ Replace the control board.SeeBrewing Circuit Problem Probable Cause Troubleshooting Brewing Circuit Required Water temperatureSet-upinstructions Dripping from sprayhead Lime build upFunnel loading Problem Probable CauseDry coffee grounds remain Sprayhead Funnel Cause Things to Check DiagnosticsContents ServiceComponent Access Control Board ServiceControl Board Service Control Board Model CEZ-APS/TS/TSRSwitch Panel Service Switch Panel Model CDBC-APS/TC/TS/TSRON/OFF Switch Wiring Brew Switch Wiring Service Brew Switch Start Model CEZ-APS/TS/TSRDispense Valve Dispense ValveLimit Thermostat Limit ThermostatTank Heater Tank HeaterTank Heater Wiring Service Tank HeaterCheck for continuity across the refill valve coil terminals Refill ValveLevelsingle Phase 120V AC 2 Wire 120/208V AC 3 Wire 120/240V AC 3 WireSchematic Wiring Diagram CEZ-APS/TS/TSR Cdbc 15, 20 & 35 APS/TC/TS 120V AC 2 Wire

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.