Bunn ULTRA-1 manual Control Board ULTRA-2

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SERVICE (cont.)

CONTROL BOARD

TIC board

Control board

FIG. 35 CONTROL BOARD (ULTRA-2)

TIC board

Control board

FIG. 36 CONTROL BOARD (ULTRA-1)

Location:

The control board is located behind the front panel, on the front of the chassis.

Test Procedures:

1.Disconnect the dispenser from the power source.

2.Remove the left and right side panels. Remove the front panel and unplug ribbon cable from J5 (ULTRA-2) or J9 (ULTRA-1) .

3.With a voltmeter, check the supply voltage from J5-8 (WHI/BLU) to J5-20 (WHI/BLK).

4.Connect the dispenser to the power source.

The indication must be:

Approximately 12.6 volts ac for all models.

5.Disconnect the dispenser from the power source.

If voltage is present as described and the dispenser does not operate, replace Control Board.

If voltage is not present as described, refer to the Wir- ing Diagram and check the dispenser wiring harness.

Removal and Replacement:

1.Disconnect the main harness from connector J5 (ULTRA-2) or J9 (ULTRA-1) on the control board.

2.Remove the four #8-18 pan head screws securing the control board to the mounting box. Disconnect TIC (memory) board from connector J1 on the control board.

NOTE: On models with Auto-Fill, remove the auto-fill adapter board.

3.Reconnect TIC board to J1 on the new control board.

4.Secure the control board to mounting box with the four #8-18 pan head screws.

5.Reconnect the main harness to J5 (ULTRA-2) or J9 (ULTRA-1) on the control board.

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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-2Recommended Daily Cleaning ULTRA-2 shown Other and disconnect from Be taken when handling HopperFrom the rear of the drum Under spring tension. Spread One side of the handle first, thenRecommended Daily Cleaning Drums and press the sealsFirmly into place as shown Auger noseSanitizing Procedure Auto-fill Cleaning Instructions With Brixing Pump InstalledMaterials required Preventive Maintenance Normal OperationRequired Regular Maintenance Semi Annual Kit ContentsInstructions DescriptionRequired Regular Maintenance No Power TroubleshootingBoard Troubleshooting Chills but Won’t freeze Set into DAY modeSet into ICE mode Is display showing Done Adjust CleanTroubleshooting No cooling At all Yes Dirty? Check fan Have a certifiedAdjust thickness Screen higher Troubleshooting Freezes, but not Thick enoughBrix ratio Too much Troubleshooting Noise Auger jumping Check fanDrum alignment Check auger shaft bushings Auger won’t turnTroubleshooting Torque Sensor ErrorTorque Sensor Error Torque Sensor Shorted Torque Sensor OpenTemperature Sensor Shorted Troubleshooting Temperature Sensor ErrorTemperature Sensor Open Troubleshooting Clean Filter Messages Filter Needs CleaningFreezing is Disabled Monthly reminderService Component Access PanelsAuger Motors SERVICEcontMotor Coil Resistance Auger Motor Capacitor Auger Motor CapacitorsAuger Shaft Assembly Auger Shaft AssemblyService Auger Shaft ASSEMBLYcont Remove and clean condenser air filter, FigTest Procedures Remove the wires from the circuit breakerCircuit Breaker Location120V Compressors 230V Compressors Compressor Start Relay Terminals Service Compressor Embraco ULTRA-2 Compressor AssyModel T-2155 Service Compressor Embraco ULTRA-2Model T-2168 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 SupportUse cable ties to secure wires away from fan blades Front of the condenser Test ProceduresFAN ULTRA-2 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 SensorTorque Sensor Circuit Board Remove the cover and set aside for reassemblyDo not Turn on Augers Transformer LoadCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 ULTRA-1 Triacs Triac MAP for ULTRA-1TH1 & MOV4 Controls Auger Liquid AUTO-FILL Board ULTRA-2 Triacs Triac Maps for ULTRA-2TH6 & MOV6 Controls Right Auger 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.
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