Bunn ULTRA-1 manual Troubleshooting, No Power, Board

Page 14

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 person- nel.

All electronic components have 120 volt ac and/or 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 permanent. If an intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a terminal or crimp.

Keep away from combustibles.

WARNING – • Exercise extreme caution when servicing electrical equipment.

Unplug the dispenser when servicing, except when electrical tests are specified.

Follow recommended service procedures

Replace all protective shields or safety notices

No

Call licensed

electrician for repair

No Power

Correct voltage

at outlet?

Yes

Yes

12vac to Control Board

at J5-8 & J5-20?

No

Yes

Replace Control

Board

Does Membrane

 

 

 

 

 

 

No

Switch test ok?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Membrane

Switch

No

Replace

Transformer

12vac from secondary

of transformer?

Yes

Check main

wiring harness

14

41084 102709

 

Image 14
Contents ULTRA-1 ULTRA-2 Phone 217 529-6601 FAX 217BUNN-O-MATIC Commercial Product Warranty Contents User NoticesIntroduction Temp & Torque Screen Operating Controls ULTRA-1 Switch upper left corner of the control pad Operating Controls ULTRA-2From the rear of the drum Under spring tension. Spread Recommended Daily Cleaning ULTRA-2 shownOther and disconnect from Be taken when handling Hopper One side of the handle first, thenFirmly into place as shown Recommended Daily CleaningDrums and press the seals Auger noseMaterials required Auto-fill Cleaning Instructions With Brixing Pump InstalledSanitizing Procedure Preventive Maintenance Normal OperationInstructions Required Regular Maintenance Semi AnnualKit Contents DescriptionRequired Regular Maintenance Board TroubleshootingNo Power Set into ICE mode Is display showing Troubleshooting Chills but Won’t freezeSet into DAY mode Done Adjust CleanTroubleshooting No cooling At all Yes Dirty? Check fan Have a certifiedBrix ratio Too much Troubleshooting Freezes, but not Thick enoughAdjust thickness Screen higher Drum alignment Check auger shaft bushings Troubleshooting NoiseAuger jumping Check fan Auger won’t turnTorque Sensor Error TroubleshootingTorque Sensor Error Torque Sensor Shorted Torque Sensor OpenTemperature Sensor Open Troubleshooting Temperature Sensor ErrorTemperature Sensor Shorted Freezing is Disabled Troubleshooting Clean Filter MessagesFilter Needs Cleaning Monthly reminderService Component Access PanelsMotor Coil Resistance SERVICEcontAuger Motors Auger Motor Capacitor Auger Motor CapacitorsAuger Shaft Assembly Auger Shaft AssemblyService Auger Shaft ASSEMBLYcont Remove and clean condenser air filter, FigCircuit Breaker Test ProceduresRemove the wires from the circuit breaker Location120V Compressors 230V Compressors Compressor Start Relay Terminals Service Compressor Embraco ULTRA-2 Compressor AssyModel T-2168 Service Compressor Embraco ULTRA-2Model T-2155 Secure compressor to the dispenser chassis using four Compressor Appliances ULTRA-1 Compressor ThermalRelay Terminals Service Service Compressor Danfoss ULTRA-1B Compressor Capacitor Terminals Service Relay or Contactor on Early Models Control Board Control Board ULTRA-2Cooling Drum Alignment Cooling Drum Shipping SupportFAN ULTRA-2 Front of the condenser Test ProceduresUse cable ties to secure wires away from fan blades FAN ULTRA-1 FANHOT GAS Temperature Sensor Alternate TestLamp Cord Wires Lamp Cord AssyLamp Cord Connector Lamp Cord ConnectorLamp HOLDER/SOCKET Assembly Lamp HOLDER/SOCKET AssemblyLamp Relay ULTRA-2 ULTRA-1Membrane Switch ULTRA-2 Ribbon CableMembrane Switch ULTRA-1 Refer to and connect the ribbon cable to the Control BoardSolenoids WHI from Main HarnessTemperature Sensor Temperature SensorDo not Turn on Augers Remove the cover and set aside for reassemblyTorque Sensor Circuit Board Transformer LoadCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 TH1 & MOV4 Controls Auger Triac MAP for ULTRA-1ULTRA-1 Triacs TH6 & MOV6 Controls Right Auger Triac Maps for ULTRA-2Liquid AUTO-FILL Board ULTRA-2 Triacs Input and Output Chart ULTRA-1 41084 Input and Output Chart ULTRA-2 41084 41084
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ULTRA-1 specifications

The Bunn ULTRA-1 is a state-of-the-art coffee brewing system designed for commercial use, offering an unmatched combination of speed, efficiency, and flavor extraction. This single-serve coffee brewer is tailored for businesses that require high-quality coffee brews in a fast-paced environment, such as cafes, restaurants, and office kitchens.

One of the standout features of the Bunn ULTRA-1 is its ability to brew up to 14 different cup sizes, accommodating various customer preferences. This flexibility allows operators to serve everything from small espresso shots to larger coffee servings, making it a versatile addition to any beverage-serving establishment. At the heart of this brewing system is Bunn's patented brewing technology, which ensures precise water temperature and ideal brew time, optimizing the extraction process for a full-bodied flavor profile.

The ULTRA-1 is equipped with a large, easy-to-read LCD screen that provides real-time feedback, allowing users to monitor brewing progress, select cup sizes, and customize brewing parameters. This intuitive interface simplifies operation, reducing the learning curve for new staff members and enhancing overall efficiency during peak hours.

Another innovative aspect of the Bunn ULTRA-1 is its advanced thermal carafe system, which keeps brewed coffee at the optimal serving temperature without the need for a traditional warming plate. This technology helps preserve the coffee's rich flavor and aroma by preventing it from becoming bitter or stale due to prolonged exposure to heat.

The ULTRA-1 emphasizes ease of maintenance with its removable brew chamber and drip tray, allowing for quick cleaning and routine upkeep. Additionally, the brewer features a self-diagnostic system, alerting operators to any potential issues, further minimizing downtime.

From its sleek design to its robust construction, the Bunn ULTRA-1 combines aesthetics and durability, making it a reliable choice for any coffee-centric business. The compact design ensures it can fit on counters without taking up excessive space, while its stainless steel components provide longevity and resistance to wear and tear.

In conclusion, the Bunn ULTRA-1 stands out in the crowded market of commercial coffee brewers due to its advanced technology, versatility, and user-friendly features. It is designed to meet the demands of modern coffee service while ensuring that every cup brewed meets the highest standards for taste and quality.