Bunn ULTRA-2 manual Temperature Sensor

Page 57

SERVICE (cont.)

TEMPERATURE SENSOR

ULTRA-2 shown

FIG. 61 TEMPERATURE SENSOR

P1341

 

Location:

The Temperature Sensor(s) are located inside the top rear of the cooling drum under the Auger Motor covers.

Test Procedures:

1.Remove the left side housing panel.

2.Connect a voltmeter, across the two leads of the temperature sensor (leave plug connected); The indication must be:

a)Approx. 1.4 vdc @ 71° F

b)Approx. 2.6 vdc @ 32° F

If voltage reading is 0v, the Control Board is not sup- plying the necessary 5v and should be replaced. If the reading stays at 5vdc, replace thermistor.

Alternate Test:

2.Disconnect the plug on thermistor leads and check resistance as indicated below.

The indication must be:

a)5650 ohms @ 32° F ± 10%

b)2000 ohms @ 77° F ± 10%

If resistance reading is not within the range listed above, replace thermistor.

Removal and Replacement:

1.Remove the two #8-32 screws securing the auger motor cover to cooling drum mount and remove cover. Set aside for reassembly.

2.Disconnect the plug on the temperature sensor leads from the connector on the dispenser main harness.

3.Pull the temperature sensor from the tube at the top rear of the cooling drum and discard.

4.Push new temperature sensor into tube at the top rear of the cooling drum as far as it will go.

5.Refer to Fig. 62 and reconnect the wires.

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

 

1.

Ultra-2 Left Temperature Sensor

 

 

WHI to TAN J13-21

 

 

(Control Board) Positive

 

1.

Ultra-2 Right Temperature Sensor

 

 

WHI to PNK J13-22

 

 

(Control Board) Positive

 

1.

Ultra-1 Temperature Sensor

 

 

WHI to TAN J10-3

 

 

(Control Board) Positive

 

2.

WHI to WHI/BLK Main Harness

2

1

(Control Board) Negative

 

FIG. 62 TEMPERATURE SENSOR

57

41084 102709

 

Page 56 Page 58
Image 57
Page 56 Page 58
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 padFrom the rear of the drum Under spring tension. Spread Other and disconnect from Be taken when handling HopperOne side of the handle first, then SurfaceFirmly into place as shown Drums and press the sealsAuger nose Assemble the drip trayMaterials required Sanitizing ProcedureNormal Operation Preventive MaintenanceKit Contents Required Regular MaintenanceInstructions DescriptionRequired Regular Maintenance Troubleshooting No PowerBoard Set into DAY mode Troubleshooting Chills but Won’t freezeSet into ICE mode Is display showing Done Adjust CleanTroubleshooting No cooling At all Troubleshooting Freezes, but not Thick enough Adjust thickness Screen higherBrix ratio Too much Auger jumping Check fan Troubleshooting NoiseDrum alignment Check auger shaft bushings Auger won’t turnTorque Sensor Error TroubleshootingTorque Sensor Error Torque Sensor Shorted Torque Sensor OpenTroubleshooting Temperature Sensor Error Temperature Sensor ShortedTemperature Sensor Open Filter Needs Cleaning Troubleshooting Clean Filter MessagesFreezing is Disabled Monthly reminderComponent Access Panels ServiceSERVICEcont Auger MotorsMotor Coil Resistance Auger Motor Capacitors Auger Motor CapacitorAuger Shaft Assembly Auger Shaft AssemblyRemove and clean condenser air filter, Fig Service Auger Shaft ASSEMBLYcontRemove the wires from the circuit breaker Test ProceduresCircuit Breaker Location120V Compressors 230V Compressors Compressor Start Relay Terminals Service Compressor Assy Compressor Embraco ULTRA-2Service Compressor Embraco ULTRA-2 Model T-2155Model T-2168 Secure compressor to the dispenser chassis using four CSR Motor Wiring Diagram Compressor SpecificationCompressor Model Capacitor RatingsCompressor Wiring Diagram Important SafeguardsDisconnect all electrical power to the Bunn ULTRA-2 HP Testing Compressor Windings/Insulation with a Meg- gerPotential Start Relay Mounting Position External Thermal ProtectorStart Capacitor Run CapacitiorCompressor 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 AlignmentFront of the condenser Test Procedures Use cable ties to secure wires away from fan bladesFAN ULTRA-2 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
Related manuals
Manual 23 pages 57.86 Kb Manual 19 pages 61.15 Kb

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.
Top Page Image Contents