Bunn ULTRA-2 manual Preventive Maintenance, Normal Operation

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PREVENTIVE MAINTENANCE

A common problem occurs when the proper preventive maintenance procedures are not followed. Failure to perform these procedures may result in damaged equipment and may not be covered by warranty.

Please check the following items before assuming a refrigeration fault.

When the product does not freeze, there are several possibilities other than a failure in the refrigeration system. The torque between the auger motor and the frozen product is contolled by the torque sensor board measur- ing the distance between the pins on the coupler and shaft. When the distance between the pins reaches the maximum allowable distance, the compressor shuts off. The machine thinks the product thickness has reach the maximum and shuts off the compressor. The illustration below shows some of the other possible causes for a false reading from the torque sensor board.

Proper inspection and preventive maintenance (including daily cleaning) will avoid expensive repairs and costly down time.

A B C

D

E

NORMAL OPERATION

CHILL MODE

ICE MODE

A. MOTOR SHAFT TORQUE SENSOR PIN

B. AUGER SHAFT TORQUE SENSOR PIN

C. TORSION SPRINGS

D. AUGER SHAFT

E. AUGER MOTOR COUPLING

POSSIBLE CAUSES FOR FALSE READINGS

WEAK TORSION SPRINGS

TOO MUCH KRYTOX GREASE

DAMAGED/CORRODED AUGER SHAFT

 

 

 

 

 

DAMAGED/WORN BUSHINGS/SEALS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BENT TORQUE SENSOR PINS

MISSING TORQUE SENSOR PINS

DIRTY OR DAMAGED TORQUE SENSOR BOARD

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41084 102709

 

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Contents Phone 217 529-6601 FAX 217 ULTRA-1 ULTRA-2BUNN-O-MATIC Commercial Product Warranty User Notices ContentsIntroduction Temp & Torque Screen Operating Controls ULTRA-1 Operating Controls ULTRA-2 Switch upper left corner of the control padSurface Other and disconnect from Be taken when handling HopperFrom the rear of the drum Under spring tension. Spread One side of the handle first, thenAssemble the drip tray Drums and press the sealsFirmly into place as shown Auger noseMaterials required Sanitizing ProcedureNormal Operation Preventive MaintenanceDescription Required Regular MaintenanceKit Contents InstructionsRequired Regular Maintenance Board TroubleshootingNo Power Done Adjust Clean Troubleshooting Chills but Won’t freezeSet into DAY mode Set into ICE mode Is display showingTroubleshooting No cooling At all Brix ratio Too much Troubleshooting Freezes, but not Thick enoughAdjust thickness Screen higher Auger won’t turn Troubleshooting NoiseAuger jumping Check fan Drum alignment Check auger shaft bushingsTorque Sensor Shorted Torque Sensor Open TroubleshootingTorque Sensor Error Torque Sensor ErrorTemperature Sensor Open Troubleshooting Temperature Sensor ErrorTemperature Sensor Shorted Monthly reminder Troubleshooting Clean Filter MessagesFilter Needs Cleaning Freezing is DisabledComponent Access Panels ServiceMotor Coil Resistance SERVICEcontAuger Motors Auger Motor Capacitors Auger Motor CapacitorAuger Shaft Assembly Auger Shaft AssemblyRemove and clean condenser air filter, Fig Service Auger Shaft ASSEMBLYcontLocation Test ProceduresRemove the wires from the circuit breaker Circuit Breaker120V Compressors 230V Compressors Compressor Start Relay Terminals Service Compressor Assy Compressor Embraco ULTRA-2Model T-2168 Service Compressor Embraco ULTRA-2Model T-2155 Secure compressor to the dispenser chassis using four Capacitor Ratings Compressor SpecificationCSR Motor Wiring Diagram Compressor ModelCompressor Wiring Diagram Important SafeguardsDisconnect all electrical power to the Bunn ULTRA-2 HP Testing Compressor Windings/Insulation with a Meg- gerRun Capacitior External Thermal ProtectorPotential Start Relay Mounting Position Start CapacitorCompressor Thermal Compressor Appliances ULTRA-1Relay Terminals Service Service Compressor Danfoss ULTRA-1B Compressor Capacitor Terminals Service Relay or Contactor on Early Models TIC board Control BoardCooling Drum Shipping Support Cooling Drum AlignmentFAN ULTRA-2 Front of the condenser Test ProceduresUse cable ties to secure wires away from fan blades FAN FAN ULTRA-1Alternate Test HOT GAS Temperature SensorLamp Cord Assy Lamp Cord WiresLamp Cord Connector Lamp Cord ConnectorLamp HOLDER/SOCKET Assembly Lamp HOLDER/SOCKET AssemblyDisconnect the black and red leads from the LEDs Service LED LampsULTRA-2 ULTRA-1 Lamp RelayRibbon Cable Membrane Switch ULTRA-2Refer to and connect the ribbon cable to the Control Board Membrane Switch ULTRA-1WHI from Main Harness SolenoidsTemperature Sensor Temperature SensorDo not Turn on Augers Torque Sensor Circuit BoardLoad TransformerCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 TH1 & MOV4 Controls Auger ULTRA-1 TriacsTH6 & MOV6 Controls Right Auger Liquid AUTO-FILL Board ULTRA-2 TriacsInput and Output Chart ULTRA-1 Schematic Wiring Diagram ULTRA-1 Input and Output Chart ULTRA-2 Schematic Wiring Diagram ULTRA-2 AF 41084
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ULTRA-2 specifications

The Bunn ULTRA-2 is an exceptional frozen beverage dispenser that caters to both commercial and home use, making it a popular choice in various establishments such as cafes, restaurants, and convenience stores. Renowned for its reliability and efficiency, the ULTRA-2 serves a wide range of frozen beverages, including slushes, smoothies, and frozen cocktails, providing an irresistible treat for customers.

One of the standout features of the Bunn ULTRA-2 is its high-capacity design. With a dual hopper system, this machine allows operators to serve two different flavors simultaneously. Each hopper can hold up to 3.2 gallons of product, allowing for continuous service without the need for frequent refills. This is particularly advantageous during peak hours when demand is high.

The ULTRA-2 is equipped with Bunn's advanced refrigeration technology, which ensures rapid freezing and consistent product quality. The machine uses a patented freezing mechanism that maintains optimal product texture and temperature, resulting in a smooth, uniform consistency that keeps customers coming back for more. Additionally, the ULTRA-2's adjustable temperature control allows operators to customize the consistency of the beverages to their liking.

User-friendliness is another hallmark of the Bunn ULTRA-2. The machine features intuitive controls that simplify operation, making it easy for staff to learn and use efficiently. A built-in safety feature prevents the machine from operating when the hoppers are too low, minimizing waste and ensuring product quality.

Durability and ease of maintenance are also prominent characteristics of the ULTRA-2. Constructed from high-quality stainless steel, the machine offers enhanced longevity and is resistant to rust and corrosion. The removable hoppers and door assemblies facilitate quick cleaning and maintenance, allowing businesses to keep the machine in top working condition with minimal effort.

In summary, the Bunn ULTRA-2 stands out in the crowded market of frozen beverage dispensers through its dual hopper functionality, advanced refrigeration technology, user-friendly design, and robust construction. Whether for a busy café or a family gathering, the ULTRA-2 provides a reliable solution for delivering delicious frozen beverages that satisfy a variety of tastes and preferences.
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