Bunn ULTRA-2 manual Torque Sensor Circuit Board, Do not Turn on Augers

Page 58

SERVICE (cont.)

TORQUE SENSOR CIRCUIT BOARD

ULTRA-2 shown

FIG. 63 TORQUE SENSOR CIRCUIT BOARD P1341

Location:

The torque sensor circuit board is located on the rear of the cooling drum mount just left of center.

Test Procedures:

1.Place black meter lead at J1-3 (common) and red lead at J1-1 (signal). Set meter to 10 - 20volts DC scale. Turn on power switch.

DO NOT TURN ON AUGERS!

2.Using a strip of paper, momentarily block the light path between red LED and white phototransistor. If the meter displays 5vdc when blocked and 0v when unblocked, then the Torque Sensor is good. If there is no 5vdc reading, verify that both red and white sensors are clean.

3.If there is still no 5vdc reading when blocked, place the red meter lead at J1-2 and verify that there is 4.5vdc supplied to Torque Sensor. If there is no 5vdc supplied, check wiring between control board and Torque Sensor. If wiring is ok, then replace the main control board.

1.Ultra-2 Left Signal (WHI/GRY)

1.Ultra-2 Right Signal (WHI/GRN)

1.Ultra-1 Signal (WHI/GRY)

2. (+) 5vdc (BLU)

3. (-) common (WHI/BLK)

1

J1

L.E.D.

PHOTOTRANSISTOR

FIG. 64 TORQUE SENSOR CIRCUIT

BOARD TERMINALS

Removal and Replacement:

1.Remove the two #8-32 locking screws securing the auger motor cover to the cooling drum mount.

2.Remove the cover and set aside for reassembly.

3.Remove the #8 locking screw on the lower right side of the auger motor mounting bracket securing the auger motor run capacitor. Set capacitor aside with wires attached.

4.Disconnect the auger motor plug from the connector on the main wiring harness.

5.Remove the three remaining #8 locking screws securing the auger motor mounting bracket to cooling drum mounting bracket.

6.Remove motor with mounting bracket, split pin/

torsion spring bearings as an assembly and set aside for reassembly.

NOTE: When removing or installing the motor be sure the split pin in the motor shaft is turned to a position that will clear the torque sensor circuit board.

7.Disconnect the plug from the dispenser main wiring harness to the torque sensor circuit board.

8.Remove the #8-32 locking screw and washer secur- ing torque sensor circuit board to the cooling drum mount.

9.Remove torque sensor circuit board and discard.

10.Install new torque sensor circuit board in the slot in the rear of the cooling drum mount and secure with a #8-32 locking screw and washer.

11.Refer to Fig. 42 and reconnect the wires.

12.Reinstall motor with mounting bracket, drip tray, split pin and torsion spring bearings using three #8 locking screws onto the cooling drum bracket.

13.Install the auger motor capacitor on the lower right side of the auger mounting bracket using the remaining #8 locking screw.

14.Connect the auger motor terminal to the terminal on the main wiring harness.

15.Refer to Fig. 64 when reconnecting the wires.

16.Position the auger motor cover on the cooling drum mount and secure with two #8-32 locking screws.

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41084 102709

 

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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-2One side of the handle first, then Other and disconnect from Be taken when handling HopperFrom the rear of the drum Under spring tension. Spread SurfaceAuger nose Drums and press the sealsFirmly into place as shown Assemble the drip traySanitizing Procedure Materials requiredPreventive Maintenance Normal OperationInstructions Required Regular MaintenanceKit Contents DescriptionRequired Regular Maintenance No Power TroubleshootingBoard Set into ICE mode Is display showing Troubleshooting Chills but Won’t freezeSet into DAY mode Done Adjust CleanTroubleshooting No cooling At all Adjust thickness Screen higher Troubleshooting Freezes, but not Thick enoughBrix ratio Too much 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 Shorted Troubleshooting Temperature Sensor ErrorTemperature Sensor Open Freezing is Disabled Troubleshooting Clean Filter MessagesFilter Needs Cleaning 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, 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-2155 Service Compressor Embraco ULTRA-2Model T-2168 Secure compressor to the dispenser chassis using four Compressor Model Compressor SpecificationCSR Motor Wiring Diagram Capacitor RatingsImportant Safeguards Compressor Wiring DiagramTesting Compressor Windings/Insulation with a Meg- ger Disconnect all electrical power to the Bunn ULTRA-2 HPStart Capacitor External Thermal ProtectorPotential Start Relay Mounting Position Run CapacitiorCompressor Appliances ULTRA-1 Compressor ThermalRelay Terminals Service Service Compressor Danfoss ULTRA-1B Compressor Capacitor Terminals Service Relay or Contactor on Early Models Control Board TIC boardCooling 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 AssemblyService LED Lamps Disconnect the black and red leads from the LEDsLamp 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 Do not Turn on AugersTransformer LoadCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 ULTRA-1 Triacs TH1 & MOV4 Controls AugerLiquid AUTO-FILL Board ULTRA-2 Triacs TH6 & MOV6 Controls Right AugerInput 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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