Bunn CEZF, CDBC service manual Troubleshooting Brewing Circuit

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TROUBLESHOOTING (cont.)

BREWING CIRCUIT (cont.)

PROBLEM

Brew cycle will not start (cont.)

PROBABLE CAUSE

8.Control board or dispense valve (CDBC-APS/TC/TS/TSR & CEZ- APS/TS/TSR)

REMEDY

If the start switch (CEZ-APS/TS/ TSR) or switch panel (CDBC-APS/ TC/TS/TSR) is operating properly, proceed as follows. Attach a volt- meter to the terminals of the dis- pense valve solenoid. Connect the brewer to the power source. Turn on the brewer and press the BREW switch. Voltage should be present at the solenoid terminals. If voltage is not present, refer to the wiring diagrams and check the wiring har- ness. If voltage is present, check for continuity across the terminals of the solenoid coil. If continuity is not present, replace the solenoid valve (See page 26). If continuity is present, the valve may be stuck closed.

Consistently low beverage level in

1. Brew volume (CDBC-APS/TC/TS/

Set up brewer according to instruc-

the dispenser or beverage overflows

TSR & CEZ-APS/TS/TSR)

tions in section Adjustments-Brew

dispenser

NOTE: All volumes to run with

Volumes. (See pages 7 or 8) Using

 

sprayhead attached.

a stop watch or second hand, time

 

 

the length of the brew cycle. Record

 

 

this time inside the top lid. If service

 

 

is ever needed again, use the time

 

 

as reference to determine if time

 

 

has changed.

 

2. Lime build up

Inspect the dispense valve and

 

 

sprayhead for excessive lime de-

 

 

posits. Delime as required.

 

3. Dispense Valve

Remove dispense valve and clear

 

 

any obstructions. Rebuild or re-

 

 

place valve if necessary. (See page

 

 

26)

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Contents Phone 217 FAX 217 Post Office BOX SPRINGFIELD, IllinoisIntroduction ContentsUser Notices Electrical Hook-Up Electrical RequirementsPlumbing Requirements Brew Switch ON/OFF SwitchReady Indicator Operating ControlsCoffee Brewing CleaningInitial SET-UP Adjusting Brew Volumes CEZ-APS/TS/TSR Adjustments & Optional SettingsSetting Brew Temperature CDBC-APS/TC/TS/TSR Adjustments & Optional SettingsDisplaying Brew Temperature Setting Brew LockoutCDBC-APS/TC/TS/TSR Adjustments & Optional Settings Water Sensing Threshold Adjustment ProcedureBefore troubleshooting this brewer, check for the following TroubleshootingRefill Circuit Problem TroubleshootingProbable Cause Remedy2a. 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 CircuitControl Board Cdbc & CEZ ContReplace the control board.See Pages 21Brewing Circuit Problem Probable Cause Troubleshooting Brewing Circuit Set-upinstructions Water temperatureDripping from sprayhead Lime build up RequiredFunnel 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.
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