Bunn ULTRA-1 manual Service Relay or Contactor on Early Models

Page 39
FIG. 32 RELAY

SERVICE (cont.)

RELAY (or CONTACTOR on Early Models)

ULTRA-2 shown

Location:

The relay (or contactor) is located inside the dis- penser chassis on the lower outside of the component

If continuity is present as described, disconnect the dispenser from power source and reconnect wires to terminals #6 and #8, the relay is working.

If continuity is not present as described, do the same continuity test across terminals #2 and #4. If continu- ity is present between terminals #2 and #4, reconnecr wires to terminals #2 and #4 instead of #6 and #8.

If continuity is not present as described, replace the relay.

Removal and Replacement:

1.Disconnect the wires from the relay.

2.Remove the two #8-32 locking screws securing the relay to the chassis. Remove and discard relay.

3.Install the new relay on the chassis using two #8-32 locking screws.

4.Refer to Fig. 33 and 34 to reconnect the wires.

Early Model ULTRA-2

bracket.

Test Procedures:

1.

Disconnect the dispenser from the power source.

2.

Remove the right side panel.

3.

Connect the dispenser to the power source.

4.

Turn on power (I/O) switch. Verify UPPER case

 

“ICE” or “CHILL” mode.

5.

With a voltmeter, check the voltage across the white

Terminal #4

Terminal #2

Terminal #6

BLK from Main

Harness/Power Cord

Terminal #8

WHI/ORN from

Compressor Harness

Terminal #0

WHI from Main Harness

Terminal #1

ORN from

Control Board

wire and the orange wire.

The indication must be:

a) 120 volts ac for 120 volt models.

b) 230 volts ac for 230 volt models.

6. Disconnect the dispenser from the power source.

If voltage is present as described, proceed to #7.

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

7.Disconnect the black wire and the WHI/ORN wires from relay terminals #6 and #8.

8.Connect the dispenser to the power source.

9.Turn on power (I/O) switch. Verify UPPER case “ICE” or “CHILL” and check for continuity across terminals on relay.

 

P1333

FIG. 33 CONTACTOR TERMINALS

 

 

Late Model ULTRA-2 & ULTRA-1

Terminal #0

Terminal #1

WHI from

ORN from

Main Harness

Main Harness

 

Terminal #8

 

BLK from

 

Main Harness

Terminal #2

Terminal #6

Terminal #4

WHI/ORN from

Main Harness

 

FIG. 34 RELAY TERMINALS

39

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 padOne side of the handle first, then Recommended Daily Cleaning ULTRA-2 shownOther and disconnect from Be taken when handling Hopper From the rear of the drum Under spring tension. SpreadAuger nose Recommended Daily CleaningDrums and press the seals Firmly into place as shownAuto-fill Cleaning Instructions With Brixing Pump Installed Sanitizing ProcedureMaterials required Normal Operation Preventive MaintenanceDescription Required Regular Maintenance Semi AnnualKit Contents InstructionsRequired Regular Maintenance Troubleshooting No PowerBoard Done Adjust Clean Troubleshooting Chills but Won’t freezeSet into DAY mode Set into ICE mode Is display showingYes Dirty? Check fan Have a certified Troubleshooting No cooling At allTroubleshooting Freezes, but not Thick enough Adjust thickness Screen higherBrix ratio Too much 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 ErrorTroubleshooting Temperature Sensor Error Temperature Sensor ShortedTemperature Sensor Open Monthly reminder Troubleshooting Clean Filter MessagesFilter Needs Cleaning Freezing is DisabledComponent 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 ASSEMBLYcontLocation Test ProceduresRemove the wires from the circuit breaker Circuit Breaker120V 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 Compressor Thermal Compressor Appliances ULTRA-1Relay Terminals Service Service Compressor Danfoss ULTRA-1B Compressor Capacitor Terminals Service Relay or Contactor on Early Models Control Board ULTRA-2 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 AssemblyULTRA-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 SensorRemove the cover and set aside for reassembly Torque Sensor Circuit BoardDo not Turn on Augers Load TransformerCoolant Schematic ULTRA-1 Coolant Schematic ULTRA-2 Triac MAP for ULTRA-1 ULTRA-1 TriacsTH1 & MOV4 Controls Auger Triac Maps for ULTRA-2 Liquid AUTO-FILL Board ULTRA-2 TriacsTH6 & 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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