Bunn S/N DUAL068000 manual Power Possible Cause, Limit Thermostat, Tank Heaters

Page 47

TROUBLESHOOTING (cont.)

Power

Possible Cause

Troubleshooting Procedures

Water flows into tank continuously with power applied to brewer.

1.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.

2.

Electronic Control Board

Water will not heat or display shows 1.

Limit Thermostat

HEATING TIME TOO LONG

 

CAUTION - Do not eliminate or bypass limit thermostat. Use only replacement part #23717.0001.

2. Tank Heaters

Substitute a control board known to be in good working order.

Remove power from the brewer. Press reset button on limit ther- mostat. Then check for continuity through it.

Remove power from the brewer. Check for continuity through the tank heaters.

Page 47

29877-3 062005

 

Page 46 Page 48
Image 47
Page 46 Page 48
Contents Phone 217 529-6601 FAX 217 Dual SH DBCIntroduction BUNN-O-MATIC Commercial Product WarrantyTable of Contents 00656.0000 37881.0000 03408.0004 User Notices00658.0000 00831.0000230 volt ac models Electrical RequirementsPlumbing HOOK-UP CE RequirementsPlumbing Requirements Operating Controls Coffee Brewing Initial SetupCleaning Glossary Programming Programming SwitchesProgram Functions Level Programming the BrewerImportant Programming Notes Read Carefully Recipes 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 Recipe Programing MethodsTo a LevelContinue To E To D ReturnsContinue to F Program Flow DiagramContinue to B Return to a Left Brew Valve Byps OZ/M Procedure for modifying units of measure Units Setting Units of MeasureThis function allows the operator to set Brew Procedure for Setting the RecipeSET NEW Recipe Sizes DONE? SET NEW RecipeSET NEW Recipes Procedure to program the coffee nameRight Otherwise, press Next to display no NameReview Recipes Review RECIPES/MODIFY RECIPES/SET UP no Name CoffeeProcedure for reviewing recipes TimesDone Coffee Name Modifyshownext Batches DONE? YES Brew OZ Setting or Adjusting Brew VOL- UmesBatches DONE? BypassModifying pulse brew SET Pulse BrewSET Pulse Brew NO-NAME Left ModifyshownextSET Pulse Brew Easy Pulse Setup DONE? SET Pulse Brew Enter TimesTIMES? SET Preinfusion Read % Bypass Procedure to modify drip timesSetup Complete Drip Time now displayed on non funnel lock units as wellOnly Procedure to copy settingsReads Copy Settings Assign RecipesSET Temp Enable ADS?YOU SURE? Are YOU SURE?SET Ready Procedure to set ready temperatureSET Temp Refill Range 20 toCalibrate Flow Spray OZ/M Procedure to adjust the flow rate settingProcedures to calibrate the sprayhead flow rate Bypass OZ/MCalibrate Flow Repeat steps 1 8 when calibrating the other sideProcedures to calibrate the bypass flow rate Repeat steps 1 9 when calibrating the other sideThis function allows the operator to track Not resettableProcedures to view/reset the brew counters Brew CountersServer not in Place Funnel DetectServer Detect Testing individual components outputs Service ToolsNothing Pressed Service Tools Procedure to test components outputsProcedure to test switches Left Brew ValveERS? Service ToolsProcedures to test servers Procedures to test coil frequencyProcedure to set factory defaults Factory DefaultsScreen Displayed Possible Cause TroubleshootingDisable the Server Detect func- tion Smart Funnel not fully inserted into the funnel rails TemperatureTroubleshooting Procedures Screen DisplayedControl Board/Thermistor failure Tank Heater failureTriac Failure Troubleshooting Brew cycle will not start No water Problem Possible Cause Troubleshooting ProcedureEquipment will not operate No power or incorrect voltage Data plate within +/- 10%Problem Possible Cause Tank Heaters Power Possible CauseLimit Thermostat Triac ProblemProblem Possible Cause Troubleshooting Procedures For each brew cycle Consistently high or low beverage Brew Volume adjustmentWater temperature Level in serverTions Tank Heaters Remove and clean lime off tankWeak beverage Incorrect Recipe Age, preinfusion, or pulse brewDual SH with Smart Funnel DBC Schematic Wiring DiagramSchematic 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.
Top Page Image Contents