1.43 UI Replacement

Power Down Plunge

• Pause the chiller by pressing the pause button on the UI.
  • ⚠️ Powering down the Plunge while it's in a cooling cycle can damage the chiller. 
• Once the chiller is in idle mode press the test button on the GFCI outlet to power down the Plunge.
• Unplug the GFCI outlet from the outlet.

🚨 Important: Do not power down the Plunge before pausing the chiller. Powering down the Plunge while it is in a cooling cycle can damage the chiller.

Remove Chiller Vents and Thumb Nuts

• Remove both side chiller vent panels.

• Unscrew all 6 thumb nuts securing the rear panel:

  • 3 on the left vent

  • 3 on the right vent

Remove Rear Cover

• Grab the rear cover by the vent openings and slowly pull and wiggle the rear cover free. 

Disconnect Ribbon Cable From UI

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• Reach behind the UI to access the ribbon cable connection.

• Gently push in on the ribbon cable to release tension.

• While holding the cable, push outward on the wing tabs to release the lock.

• Carefully pull the ribbon cable out once the tabs are spread open.

Remove UI

• Use a 7mm socket or 7mm hex nut driver to unscrew the four nuts securing the UI to the tub—two on each side.

• As you loosen the final nut, support the UI with one hand to prevent it from falling.

• Once all nuts are removed, carefully pull the UI out from the front of the tub.

• Set aside and save all nuts and washers—you’ll need them to install the new UI.

Install UI

• Place the new UI into the cutout on the front of the tub.

• Hand-thread all four mounting nuts onto the UI bolts—two on each side.

• 🚨 Ensure the UI is aligned properly and seated securely in the opening.

• Once all nuts are hand-tightened and the UI is held in place, use a 7mm hex driver to fully tighten each nut.

• Make sure all fasteners are snug and the UI is firmly secured to the tub.

Connect Ribbon Cable To UI

• Locate the UI ribbon cable coming from the back of the electrical box.

• Ensure the red stripe on the ribbon cable is facing down

  • 🚨 If it’s facing up, the UI will not function.

• Open the wing tabs on the UI connector to allow for cable insertion.

• Insert the ribbon cable into the UI connector until it clicks into place.

• Close the wing tabs around the ribbon cable to secure the connection.

Test UI for Functionality

• Plug the Plunge back into the power outlet.

• Press the Reset button on the GFCI plug to power on the unit.

• Wait for the startup sequence to complete and confirm that the water temperature displays on the UI screen.

• Test each UI button to ensure proper functionality:

  • Press the down button and confirm the temperature decreases.

  • Press the up button and confirm the temperature increases.

  • Press the light button and check that the LED light turns on.

  • Press the pause button and confirm the chiller stops running.

Power Down Plunge

• Pause the chiller by pressing the pause button on the UI.
  • ⚠️ Powering down the Plunge while it's in a cooling cycle can damage the chiller. 
• Once the chiller is in idle mode press the test button on the GFCI outlet to power down the Plunge.
• Unplug the GFCI outlet from the outlet.

🚨 Important: Do not power down the Plunge before pausing the chiller. Powering down the Plunge while it is in a cooling cycle can damage the chiller.

Install Rear Cover

• Carefully slide rear cover over chiller.

• Ensure power cord is routed through the correct side.

• Reinstall all 5 thumb nuts to secure rear panel.

• Attach the left and right chiller vents.

Finalize Job

• Complete the End-of-Job Checklist:

  • Confirm all connections are secure

  • Clean up tools and work area

  • Check for leaks or loose fittings

  • Ensure everything is reinstalled properly