Bunn S/N DUAL068000 manual Problem Possible Cause

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TROUBLESHOOTING (cont.)

Problem

Possible Cause

Troubleshooting Procedure

Automatic refill will not operate or display shows FILL TIME TOO LONG (cont.)

3.Refill Probe or Sensitivity Set- ting

Check the sensitivity setting. Refer to Refill function. If the left three digit number is less than the right number, the machine “thinks” it is full and the refill valve should be off. If the left number is larger than the right, then the refill valve will automatically be turned on to fill the tank. The right number is the threshold setting and can be adjusted to compensate for extreme water conditions: very pure, low conductance water requires a higher setting, while high mineral content, high conductance water requires a lower setting. Note that the left number changes from a high value when water is NOT touching the refill probe to a low value when water IS touching the probe. For best operation, the right number should be set to a value midway between these low and high numbers. Before changing the setting, confirm that the refill probe is free of scale buildup and the connection to it is secure.

Water flows into tank continuously with power removed from brewer.

4.

Refill Valve

Test the Refill valve. Refer to Testing

 

 

Individual Components.

5.

Overflow Protection Switch

When this condition occurs, the

 

 

brewer will display OVERFLOW CUP

 

 

FULL. EMPTY CUP. The reason for

 

 

overfilling could be a defective refill

 

 

valve, an incorrect sensitivity setting,

 

 

(see above) or boiling.

6.

Electronic Control Board

Substitute a control board known to

 

 

be in good working order.

1.

Refill valve

Foreign material lodged in valve,

 

 

holding it in open state.

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29877-3 062005

 

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Contents Dual SH DBC Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty IntroductionTable of Contents 00831.0000 User Notices00658.0000 00656.0000 37881.0000 03408.0004Electrical Requirements 230 volt ac modelsPlumbing Requirements CE RequirementsPlumbing HOOK-UP Operating Controls Cleaning Initial SetupCoffee Brewing Glossary Programming Switches ProgrammingImportant Programming Notes Read Carefully Programming the BrewerProgram Functions Level Recipe Programing Methods Using a Smart Funnel and a G9-2T DBC or MHG GrinderNot using a Smart Funnel and/or a G9-2T DBC or MHG Grinder RecipesReturns LevelContinue To E To D To aContinue to B Return to a Program Flow DiagramContinue to F Left Brew Valve Byps OZ/M Units Setting Units of Measure Procedure for modifying units of measureSET NEW Recipe Procedure for Setting the RecipeThis function allows the operator to set Brew SET NEW Recipe Sizes DONE?Procedure to program the coffee name SET NEW RecipesOtherwise, press Next to display no Name RightTimes Review RECIPES/MODIFY RECIPES/SET UP no Name CoffeeProcedure for reviewing recipes Review RecipesBrew OZ Setting or Adjusting Brew VOL- Umes Done Coffee Name Modifyshownext Batches DONE? YESBypass Batches DONE?SET Pulse Brew Modifying pulse brewNO-NAME Left Modifyshownext SET Pulse BrewSET Pulse Brew Easy Pulse Setup TIMES? SET Pulse Brew Enter TimesDONE? SET Preinfusion Drip Time now displayed on non funnel lock units as well Procedure to modify drip timesSetup Complete Read % BypassAssign Recipes Procedure to copy settingsReads Copy Settings OnlyAre YOU SURE? Enable ADS?YOU SURE? SET TempRefill Range 20 to Procedure to set ready temperatureSET Temp SET ReadyBypass OZ/M Spray OZ/M Procedure to adjust the flow rate settingProcedures to calibrate the sprayhead flow rate Calibrate FlowRepeat steps 1 9 when calibrating the other side Repeat steps 1 8 when calibrating the other sideProcedures to calibrate the bypass flow rate Calibrate FlowBrew Counters Not resettableProcedures to view/reset the brew counters This function allows the operator to trackServer Detect Funnel DetectServer not in Place Service Tools Testing individual components outputsLeft Brew Valve Service Tools Procedure to test components outputsProcedure to test switches Nothing PressedProcedures to test coil frequency Service ToolsProcedures to test servers ERS?Factory Defaults Procedure to set factory defaultsDisable the Server Detect func- tion TroubleshootingScreen Displayed Possible Cause Screen Displayed TemperatureTroubleshooting Procedures Smart Funnel not fully inserted into the funnel railsTriac Failure Tank Heater failureControl Board/Thermistor failure Troubleshooting Data plate within +/- 10% Problem Possible Cause Troubleshooting ProcedureEquipment will not operate No power or incorrect voltage Brew cycle will not start No waterProblem Possible Cause Limit Thermostat Power Possible CauseTank Heaters Problem TriacProblem Possible Cause Troubleshooting Procedures Level in server Consistently high or low beverage Brew Volume adjustmentWater temperature For each brew cycleAge, preinfusion, or pulse brew Tank Heaters Remove and clean lime off tankWeak beverage Incorrect Recipe TionsSchematic Wiring Diagram Dual SH with Smart Funnel DBCSchematic Wiring Diagram Dual SH DBC W/SMART Funnel Limit Thermostat MT1

S/N DUAL068000 specifications

The Bunn S/N DUAL068000 is a versatile and high-performance commercial coffee brewer designed for those who demand quality and efficiency in their coffee-making operations. This brewer is part of Bunn’s DUAL series, known for its innovative technology and robust construction, making it a favored choice among coffee shops, restaurants, and offices.

One of the standout features of the DUAL068000 is its dual brewing capability. This allows users to brew two different types of coffee simultaneously, ensuring a wide range of flavors and options for customers. The unit is equipped with two independent brewing chambers, each capable of producing a batch of coffee in a matter of minutes, which is ideal for high-volume settings.

The DUAL068000 utilizes Bunn’s state-of-the-art brewing technology, including its patented "Duo-Temp" brewing system. This technology ensures that water is heated to the optimal temperature, generally between 195°F and 205°F, for extracting the best flavors from coffee grounds. Furthermore, the unit features a precision digital control system with programmable settings, allowing users to fine-tune brew times and temperatures for consistent quality.

An innovative characteristic of the DUAL068000 is its energy efficiency. The brewer incorporates an energy-saving mode, reducing power consumption during off-peak hours without sacrificing performance when needed. This makes the brewer not only cost-effective but also environmentally friendly, aligning with the growing trend towards sustainability in the food and beverage industry.

In terms of construction, the Bunn S/N DUAL068000 boasts a durable stainless steel design, ensuring longevity and resistance to wear and tear. It is also designed with easy access to components for maintenance, making it convenient for operators to clean and service the machine as necessary.

Other notable features include an integrated hot water faucet for tea and instant beverages, the capability to brew into various container sizes, and a large reservoir that minimizes refill frequency.

In conclusion, the Bunn S/N DUAL068000 is an exemplary commercial coffee brewer that combines advanced technology, durable construction, and user-friendly features. Its dual brewing capability and energy-saving design make it a top choice for establishments looking to enhance their coffee offerings while maintaining efficiency and quality. With this brewer, businesses can cater to a diverse array of customer preferences, making it an invaluable asset in any beverage service environment.
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