Left & Right Pressure Switch - Cfv/Autofill - Bunn Ultra NX Service & Repair Manual

Left and Right Pressure Switch - CFV/Autofill
FIG. 22 PRESSURE SWITCH
Location:
Inside the auger motor cover, the pressure switch
is mounted on the two center syrup CFV CFIVE
assembly inlet fittings.
Rear Cover Removal:
1. Disconnect power from machine.
2. Lift hopper cover to remove dual inlet fitting
from hopper.
3. Remove 4 screws securing rear cover.
4. Grab cover with water and syrup line still
connected to the inlet barb fitting and gently
pull away from machine.
Test Procedures:
NOTE: Ensure the CO
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properly adjusted to a regulated pressure range
between 40 - 80psig. A typical set point is 65psig.
1. Enter the software program and scroll to
main "Auto Refill" menu.
2. Press the "Right Dot" switch to answer "Yes".
3. Press the "Center Dot" switch to advance
onto "L Pressure R" menu.
4. The bottom line on the display will indicate
the pressure status for Left & Right hopper
as being "Good" or "Low".
If the supply CO and pressure setting is within the
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40 - 80psig range and the status reads "Low", note
the position of the wires on the pressure switch
terminals before replacing the pressure switch.
NOTE: Switch is wired to the normally open
terminal.
SERVICE - REAR COVER COMPONENTS
supply is adequate and
If the supply CO and pressure setting is adequat
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and the status reads "Good" on left and right side,
but no operation of the water and syrup valve to
delver product, check and make sure the "Auger
Refill On" circuit is activated by toggling the
corresponding left or right "Auger" button on the
User Panel until "Auger Refill On" is displayed on
that side to operate refill feature.
If the supply CO is empty or low, pressure is out of
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the required 40 - 80psig range and the "L Pressure
R" menu reads "Low", follow location procedure
"changing out portable CO
location manager being out of CO
Part Removal and Replacement:
1. Disconnect power supply from the machine.
2. Shut off the main water and bag-in-box source
supply.
3. Locate the syrup CF CFIVE solenoid valve
pressure switch being replaced.
4. Unlock the lower valve inlet by moving the red
lock clip to release CF CFIVE solenoid valve
from lower mount CFIVE fitting.
5. Remove one screw securing the lower mount
CF CFIVE fitting to the cover.
6. Note the location of wires on the pressure
switch terminals before disconnecting them
from the pressure switch.
7. Unscrew the pressure switch from the fitting.
8. Install thread sealant onto the replacement
pressure switch threads.
9. Reinstall pressure switch into CF CFIVE mount
fitting.
10. Install CF CFIVE mount fitting with pressure
switch back into position and secure with screw.
11. Reinstall CF CFIVE onto lower mount fitting
and secure by moving the red lock clip into lock
position.
12. Reinstall wires onto pressure switch terminals.
13. Turn on the water and bag-in-box source supply.
14. Reconnect machine to power supply.
NOTE: Check operation and inspect for leaks.
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tank" and/or notify
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supply.
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