Bunn S/N DUAL068000 manual Troubleshooting, Screen Displayed Possible Cause

Page 41

TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

•Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

•All electronic components have 120 - 240 volt ac and low voltage dc potential on their terminals.

Shorting of terminals or the application of external voltages may result in board failure.

•Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be per- manent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

•Solenoid removal requires interrupting the water supply to the valve. Damage may result if sole- noids are energized for more than ten minutes without a supply of water.

•The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened.

This will help avoid twists and kinks in the tubing.

•Make certain that all plumbing connections are sealed and electrical connections tight and iso- lated.

•This brewer is heated at all times. Keep away from combustibles.

WARNING

•Exercise extreme caution when servicing electrical equipment.

•Disconnect the brewer from the power source when servicing, except when electrical tests are specified.

•Follow recommended service procedures.

•Replace all protective shields or safety notices.

Screen Displayed

Possible Cause

Troubleshooting Procedures

OVERFLOW CUP FULL. EMPTY CUP

SERVER NOT IN PLACE

1.Overflow cup is full of water. This could be caused by boiling; see chart on page 31. Also could be Refill Sen- sitivity adjustment; see page 32.

1.Soft Heat Server not correctly positioned on base.

2.Not using a Soft Heat Server, and the SERVER DETECT function is activated (on).

Empty cup. Correct cause and retry.

Position the server so that the con- nector pins on the server make con- tact with connector on the brewer.

Disable the SERVER DETECT func- tion.

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29877-3 062005

 

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Contents Phone 217 529-6601 FAX 217 Dual SH DBCIntroduction BUNN-O-MATIC Commercial Product WarrantyTable of Contents 00658.0000 User Notices00831.0000 00656.0000 37881.0000 03408.0004230 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 Not using a Smart Funnel and/or a G9-2T DBC or MHG Grinder Using a Smart Funnel and a G9-2T DBC or MHG GrinderRecipe Programing Methods RecipesContinue To E To D LevelReturns To aContinue 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 NameProcedure for reviewing recipes Review RECIPES/MODIFY RECIPES/SET UP no Name CoffeeTimes Review RecipesDone 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 Setup Complete Procedure to modify drip timesDrip Time now displayed on non funnel lock units as well Read % BypassReads Copy Settings Procedure to copy settingsAssign Recipes OnlyYOU SURE? Enable ADS?Are YOU SURE? SET TempSET Temp Procedure to set ready temperatureRefill Range 20 to SET ReadyProcedures to calibrate the sprayhead flow rate Spray OZ/M Procedure to adjust the flow rate settingBypass OZ/M Calibrate FlowProcedures to calibrate the bypass flow rate Repeat steps 1 8 when calibrating the other sideRepeat steps 1 9 when calibrating the other side Calibrate FlowProcedures to view/reset the brew counters Not resettableBrew Counters This function allows the operator to trackServer not in Place Funnel DetectServer Detect Testing individual components outputs Service ToolsProcedure to test switches Service Tools Procedure to test components outputsLeft Brew Valve Nothing PressedProcedures to test servers Service ToolsProcedures to test coil frequency ERS?Procedure to set factory defaults Factory DefaultsScreen Displayed Possible Cause TroubleshootingDisable the Server Detect func- tion Troubleshooting Procedures TemperatureScreen Displayed Smart Funnel not fully inserted into the funnel railsControl Board/Thermistor failure Tank Heater failureTriac Failure Troubleshooting Equipment will not operate No power or incorrect voltage Problem Possible Cause Troubleshooting ProcedureData plate within +/- 10% Brew cycle will not start No waterProblem Possible Cause Tank Heaters Power Possible CauseLimit Thermostat Triac ProblemProblem Possible Cause Troubleshooting Procedures Water temperature Consistently high or low beverage Brew Volume adjustmentLevel in server For each brew cycleWeak beverage Incorrect Recipe Tank Heaters Remove and clean lime off tankAge, preinfusion, or pulse brew TionsDual 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.
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