Bunn CDBCF APS, CDBCF TC Heating Circuit Problem, Water does not heat to proper tem- perature

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TROUBLESHOOTING (cont.)

HEATING CIRCUIT

PROBLEM

Water does not heat to proper tem- perature

IMPORTANT: Make sure no tem- perature tests are taken before the ready light is "ON". Tank tempera- ture must be stabilized before read- ings are taken.

PROBABLE CAUSE

1.Display flashing

2.Water not touching temperature probe

3.Water Level Probe Sensing Sys- tem

4. Temperature Probe

5. Limit Thermostat

REMEDY

Brewer has shut down due to mal- function (See Diagnostic Chart in manual, Page 20, or under top lid).

Remove temperature probe and grommet. Look into hole on tank lid. Water must be within one inch from top of tank.

Disconnect the brewer from the 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 proceed to step 4.

Remove the probe from the grom- met and submerge in a water bath of approximately 70°F(21°C). Con- nect an ohmmeter to pins 3 and 4 of the J3 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 reading should be 9.3k ± 2k OHMS. If the probe is within these parameters, reconnect the J3 plug to the control board.

Disconnect the brewer from the power source. Check for continuity across the limit thermostat termi- nals. Continuity should be present. If not replace the limit thermostat. (See page 25)

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Contents Disco Ntinued V ERS ION Introduction ContentsCDBCF-DV Brewers User NoticesCdbcf APS-DV Brewers Cdbcf APS-DV & TC-DV Brewers#02765.0000 #12364.0000 #00656.0000 Electrical Requirements Models CDBC-DV, CDBC-APS DV & Cdbcf TC-DVInitial SET-UP Plumbing RequirementsCoffee Brewing Faucet ModelsOperating Controls CleaningSetting Brew Temperature Adjustments & Optional SettingsWater Sensing Threshold Adjustment Procedure Pulse Brew Setup ProceedureNow disabled Before troubleshooting this brewer, check for the following TroubleshootingRefill Circuit Problem Probable Cause TroubleshootingRemedy Troubleshooting Refill Circuit Water does not heat to proper tem- perature Heating Circuit ProblemProblem Probable Cause Troubleshooting Heating CircuitTank Heater Ings are takenProblem Probable Cause Remedy Brewing Circuit Problem Probable Cause Consistently low beverage level Brew volume Troubleshooting Brewing CircuitDispenser Be made with sprayhead installed Brew cycle will not start Control board or dispense valveSet-upinstructions Water temperatureDripping from sprayhead Lime build up RequiredProblem Probable Cause Cause Things to Check DiagnosticsComponent Access When servicing, except when electrical tests are reControl Board ServiceSwitch Panel Dispense Valve Limit Thermostat Limit Thermostat WiringValve from the bottom of the tank Tank Heaters29707.1 Voltage Selector Switch Terminals Voltage Selector SwitchRefill Valve Warmer Elements Schematic Wiring Diagram Cdbc DV Schematic Wiring Diagram Cdbc APS-DV Cdbcf APS/TC/LPTC-DV

CDBC TC, CDBC APS, CDBCF TC, CDBCF APS specifications

The Bunn CDBCF series of coffee brewers is an essential tool for any coffee business, renowned for its reliability and efficiency. This series offers different models including the CDBCF APS (Automatic Pour-Over) and CDBCF TC (thermo carafe), among others. Each of these brewers is designed to produce exceptional quality coffee while ensuring ease of use.

One of the main features of the Bunn CDBCF APS is its automatic pour-over capability, which ensures that water is heated to the perfect brewing temperature and dispensed consistently. This model is equipped with a stainless steel water tank that maintains optimal water temperature, resulting in flavorful coffee extraction. Furthermore, the APS model allows for quick brewing cycles, producing up to 3.8 gallons of coffee per hour, making it ideal for high-demand environments.

The CDBCF TC model, on the other hand, utilizes a thermal carafe to keep coffee hot for extended periods without the need for a hot plate. This technology not only preserves the coffee’s flavors and aromas but also minimizes energy consumption. The thermal carafe can hold up to 1.9 liters of brewed coffee, making it efficient for serving in busy settings.

Both models in the CDBCF series come with a simple interface for straightforward programming and operation. Features such as the BrewLOGIC technology help regulate the brewing time and monitor water flow to ensure consistency. This is particularly beneficial in maintaining the quality of coffee across multiple brewing batches.

In terms of build quality, Bunn CDBCF brewers are constructed with durable materials designed to withstand the wear and tear of daily use in busy coffee shops. Their compact design requires minimal counter space while providing a high volume of output.

Overall, the Bunn CDBCF APS and TC models stand out for their advanced brewing technologies, versatility, and user-friendly design. They cater perfectly to coffee enthusiasts and business owners looking for reliable brewing solutions that deliver consistent quality and taste. With the Bunn CDBCF series, coffee brewing becomes not only an art but also an efficient and seamless process.
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