Bunn ULTRA-1 manual Membrane Switch ULTRA-2, Ribbon Cable

Page 49

SERVICE (cont.)

MEMBRANE SWITCH (ULTRA-2)

FIG. 53 MEMBRANE SWITCH

Location:

The membrane switch is located on the front panel.

Test Procedures:

NOTE: Before continuing, check that the ribbon cable is properly connected to the control board and not a pin off in either direction.

1.Disconnect the dispenser from the power source.

2.Remove the right and left side panels.

3.Remove the front panel and disconnect ribbon cable.

4.Check for continuity of the switches using pin #7 as common.

#7 - #1 (shield) no continuity #7 - #2 (Left Auger)

#7 - #3 (I/O)

#7 - #4 (not used)

#7 - #5 (Left ICE/CHILL/OFF) #7 - #6 (ULTRA)

#7 - #8 (GOURMET) #7 - #9 (not used) #7 - #10 (ICE)

#7 - #11 (Right Auger)

#7 - #12 (Right ICE/CHILL/OFF)

If continuity is not present when the appropriate switch is pressed, the Membrane Switch must be replaced. If continuity is present, chech the short harness going to J2 on the Control Board.

49

Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Remove right and left side panels.

3.Remove front panel and disconnect ribbon cable.

4.Peel the old Membrane Swith off the front panel and discard. Clean any remaining adhesive from front panel with mineral spirits and then alcohol.

5.Remove protective paper backing from back side of new Membrane Switch.

6.Guide ribbon cable through narrow slot in panel. Carefully position new Membrane Switch on panel, while centering display window to opening.

7.Refer to Fig. 54 and connect the ribbon cable to the chort harness from the Control Board.

NOTE: The black wire should correspond to the #1 printed on the clear portion of the cable.

 

 

GOURMET

MEMBRANE

 

I/O

ULTRA

SWITCH

 

 

ICE

12

 

 

 

 

 

 

1

 

 

 

SHIELD

 

 

LEFT

 

RIGHT

 

 

FIG. 54 MEMBRANE SWITCH

 

1

FIG. 55 MEMBRANE SWITCH

and RIBBON CABLE

41084 102709

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Page 48 Page 50
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 padOther and disconnect from Be taken when handling Hopper Recommended Daily Cleaning ULTRA-2 shownFrom the rear of the drum Under spring tension. Spread One side of the handle first, thenDrums and press the seals Recommended Daily CleaningFirmly into place as shown Auger noseSanitizing Procedure Auto-fill Cleaning Instructions With Brixing Pump InstalledMaterials required Normal Operation Preventive MaintenanceKit Contents Required Regular Maintenance Semi AnnualInstructions DescriptionRequired Regular Maintenance No Power TroubleshootingBoard Set into DAY mode Troubleshooting Chills but Won’t freezeSet into ICE mode Is display showing Done Adjust CleanYes Dirty? Check fan Have a certified Troubleshooting No cooling At allAdjust thickness Screen higher Troubleshooting Freezes, but not Thick enoughBrix 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 OpenTemperature Sensor Shorted Troubleshooting Temperature Sensor ErrorTemperature Sensor Open Filter Needs Cleaning Troubleshooting Clean Filter MessagesFreezing is Disabled Monthly reminderComponent Access Panels ServiceAuger Motors SERVICEcontMotor 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-2Model T-2155 Service Compressor Embraco ULTRA-2Model 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 AlignmentUse cable ties to secure wires away from fan blades Front of the condenser Test ProceduresFAN 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 SensorTorque Sensor Circuit Board Remove the cover and set aside for reassemblyDo not Turn on Augers Load TransformerCoolant 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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