Bunn Ultra NX Operating instructions

Side 1
Bunn-O-Matic Corporation | Post Office Box 3227 | Springfield, Illinois 62708-3227 | Phone [phone] | Fax [phone]
Ultra®NX
Frozen Beverage Dispenser
PROBLEM Possible Cause / Remedy
Blank LCD display screen Power cord may be disconnected. Also, press main power switch to the ON position.
Left (or Right) side auger not turning Press left (or right) uager toggle switch to start. (Power must be ON).
Left (or Right) side not freezing
1) Left (Right) side auger must be turning.
2) Press left (or right) ice control switch until the display reads “ICE”.
3) Adjust product thickness (See “How-to” box below or the manual).
Product is very slow to freeze
1) Check that rear of machine has a 4-inch minimum air clearance.
2) Clean rear screen with soapy water or compressed air.
3) Deflect away any warm air from nearby equipment.
Lamps in top covers are out Check that tops are plugged into base of unit.
HOW TO Steps
Access Cleaning Guide on LCD Display Press and hold the Center Dot switch for 5 seconds. When “Cleaning Guide” is displayed, press the Right Dot
switch to select YES. Then select the Center Dot switch to step through the 9 instructional screen displays.
Adjust Product Thickness
(This feature may be password protected)
Press and hold the Center Dot switch for 5 seconds. When “Cleaning Guide” is displayed, press the Left Dot
switch to select NO. The screen will then display “Set Thickness?” Select YES (the Right Dot switch) to display
thickness scale for the LEFT hopper. Move the scale up or down using the Left Dot and Right Dot switches
(minimum is 1; maximum is 16). Then press the Center Dot switch to display thickness setting for the RIGHT
hopper. Adjust as necessary. Display will time-out and return to home screen after 60 seconds.
Display Temperature & Torque readings
This provides valuable information to a technician and helps to determine whether a problem is in the
refrigeration system or mechanical in nature. Simultaneously press and hold the Left Dot and Right Dot
switches for 5 seconds. The top number displayed is the auger torque reading for each cooling drum.
The bottom number toggles between the cooling drum temperature and the hot gas temperature. Record
all three numbers for each drum before calling for service. Simultaneously press and release the Left Dot
and Right Dot switches to return to the home screen.
• Activate/change night time thaw mode
• Activate/change cleaning schedule
• Change Date and Time
See “Programming the Dispenser” in the equipment Operating and Service Manual.
These features may be password protected.
Clean REAR Filter Screen Pull Left and Right tab out to remove screen.
Clean with soapy water or compressed air and re-install the screen.
If the suggested remedy does not solve the problem, call for help or service.
RIGHT DOT SWITCH
LCD DISPLAY SCREEN
ICE CONTROL SWITCH
(Toggles to OFF, ICE, CHILL, DEFROST)
AUGER ON SWITCH
AUGER OFF SWITCH
AUGER REFILL ON
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Right Side
CENTER DOT
SWITCH
LEFT DOT SWITCH
ICE CONTROL SWITCH
(Toggle to OFF, ICE, CHILL, DEFROST)
AUGER ON SWITCH
AUGER OFF SWITCH
AUGER REFILL ON
Left Side
MAIN POWER
ON/OFF SWITCH
WARNINGS & ERROR MESSAGES Interpretation / Action To Take
NIGHT MODE
It is recommended that the product in the dispenser be thawed each day, usually overnight. The ice granules get too
large and a consistent product is difficult to maintain if left frozen too long. The machine will automatically return to
normal freeze mode at the programmed time. To change this setting, check the Operating & Service Manual.
CLEAN DUE TODAY Follow cleaning procedure on the Cleaning Card or access the one on the display window.
(See Access Cleaning Guide on LCD Screen in “How to” section above)
CLEAN DUE NOW See above. You must clean for the LCD display to clear.
MONTHLY FILTER CLEAN REQUIRED Clean rear screen with soapy water or compressed air. Press Left Dot button and hold for 3 seconds to clear screen.
FILTER NEEDS CLEANING Compressor is overheating and will shut down. Clean rear screen and be sure rear of machine has a minimum
4-inch air clearance.
!! FILTER NEEDS CLEANING !! Compressor is running too hot. Service is required.
SHAFT SEAL MAINTENANCE DUE A reminder that a 12-month Preventive Maintenance is recommended. See Operating manual for further instructions.
LEFT/RIGHT TEMPERATURE SENSOR
SHORTED/OPEN Add product to minimum fill line. If warning continues, follow instructions below.
• Left/Right Torque Sensor Shorted/Open
• Hot Gas Thermistor Shorted/Open
Record Temperature & Torque numbers (see “How to” section above).
Call for service and provide these numbers to the technician.
LEFT/RIGHT REFILL ERROR
(Hopper Lights Flashing) Press Left Dot button for 3 seconds to clear.
CHECK RIGHT/LEFT SIDE PRODUCT MIX
OR DRIVE SYSTEM Product thickness not correct. Check product ratio/brix. And/or refill hopper if low.
DEFROST - LEFT/RIGHT BARREL(S) IN
PROCESS OF DEFROSTING This will go back to normal operation after defrost is complete.
HOPPER LIGHTS FLASHING Hopper is low on product. Refill hopper to clear error.
If unit has Autofill; product BIB may be empty. Replace if needed.
www.bunn.com
58028.0000 B 2/22 © 2021 Bunn-O-Matic Corporation
Maintenance &
Troubleshooting Guide

Side 2
3. Align the Auger Shaft with
the Flat Fin of the Auger.
4. Push Augers onto Cooling
Drum and rotate until the Flat
Fins are flush inside Auger.
3 4
b
a
NOTICE: This guide is for quick reference only and is not intended to replace the information in the Operation Manual.
18.Turn ON augers and cooling
function to desired settings.
14. Wash all parts in a clean sink with mild soap and hot water (120°F). Place all parts in a clean sink with Sanitizer Solution in 120˚F (48.9˚C) water. Allow all
parts to soak for at least 5 minutes. Carefully wash all components with a clean wash cloth in the hot water and Sanitizer Solution. Use a clean, soft, bristle
brush as needed for the smaller components and tight areas. NOTE: Do not immerse Hopper Lids and use a commercial sanitizer.
15. Wash the Cooling Drums, Hoppers, Drip Trays, Top Covers, and outer enclosure using a clean wash cloth that has been soaked in the warm water and
Sanitizer Solution. NOTE: Pay attention to the shaft area and make sure it is thoroughly cleaned and sanitized.
16. Thoroughly rinse all surfaces with a clean wash cloth that has been dampened with hot water. Wipe dry with a clean, dry wash cloth before reassembling
the dispenser. NOTE: Although most parts are dishwasher safe, they may be affected by the chemicals in some commercial sanitizing agents. Do not place the
Hopper or Hopper Lids in a dishwasher. Rinse thoroughly before assembly.
NOTE: Whether liquid concentrate or granulated powder, all product must be thoroughly mixed BEFORE adding it to the hoppers.
DISASSEMBLY & CLEANING
1. Turn cooling to OFF selection.
Empty all product from the
Hoppers. Turn Auger to
OFF selection.
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SEP. 5, 2021
off off
2. Disconnect the Hopper Lid
Cords on the back of the
Hoppers.
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3. Disconnect the Level
Probes at the top rear of
the Hoppers.
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4. Remove Hopper Lids.
4
NOTE: If it’s an Autofill unit;
disconnect the Fill Hoses from
the back of the Hoppers also.
5. Remove the Faucet
Assembly.
CAUTION: The Faucet
Valve is under Spring
tension. Use tab on left
side of the Handle to pull
off Pivot Pin.
5
7. Carefully slide the Faucet
Valve up to remove the
Spring and Faucet Seal.
NOTE: Extra care should
be taken when handling
the seal to prevent damage.
Do not fold the seal as this
will cause damage to the
Teflon®sealing surface.
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Seal
7
6. Removing Handles
a. While slightly twisting
the Handle, pull the
left side off the left
Pivot Pin.
b. Then spread Handle
on right side to remove
from right Pivot Pin.
8. Depress the Hopper Lock
Plunger and lift the Hopper
up slightly.
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9. Pull Hopper forward
to remove.
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NOTE: Care must be taken to
ensure this surface does not
get scratched during cleaning.
Deep scratches could cause
leakage around the Seal.
10. Remove Auger Nose
Bushing from inside the
Hopper.
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12. Pull Auger from Cooling
Drum.
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11. Remove the Seal from the
back of the Hopper.
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13. Pull Grommet from
Cooling Drum.
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Ultra®NX
Frozen Beverage Dispenser
Use & Care Guide
ASSEMBLY AFTER CLEANING
6. Install a Hopper Seal over
the back of each hopper.
5. Install Auger Nose Bushing
into interior slots.
5 6
2. Install Grommets on the
ends of the Cooling Drums.
1. Apply provided lubricant to
Grommets on side facing
Cooling Drum.
1 2
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7. Install Hoppers over the
Augers and Cooling Drums.
8. Slide the Hoppers into
place and push down.
9. The Hoppers are seated
when the Lock Plunger
snaps into place and
sticks out.
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10. Place Spring and Seal in
Faucet Valve.
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11. Carefully slide Faucet
Valve Assembly into place
on the Hopper.
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12. Install a Handle by starting
the right side over the right
Pivot Pin.
13. While slightly twisting the
Handle, spread the left
side over the left Pivot Pin
to snap into place.
15. Set Lids on the Hoppers.
14. Install Level Probes at the
top rear of the Hoppers.
16. Attach each of the Hopper
Lid Cords on the back of
the Hoppers.
14 15 16
17. Assemble Drip Tray
and slide onto metal
extensions from base.
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NOTE: If this is an Autofill unit,
slide the Hopper Fitting into
place in the slot on the Hopper.
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SEP. 5, 2021
ICE off
www.bunn.com
58028.0000 B 2/22 © 2021 Bunn-O-Matic Corporation