How to Perform a CE Reset on a MRCOOL Multi-Zone Condenser

Performing a CE reset on your MRCOOL multi-zone condenser can resolve certain operational issues. This guide walks you through the steps to safely reset your system and restore its functionality.

Safety Disclaimer:
Before performing any maintenance, ensure power is off to the unit where necessary to avoid electrical shock. Only qualified individuals should handle electrical components. Be mindful while performing this reset to avoid directly touching any electrical components.

Steps to Perform a CE Reset:

1. Turn Off Indoor Air Handlers:

• Use the remote or power buttons to turn off all indoor air handlers.
• Keep the outdoor condenser powered on.

2. Access the Outdoor Unit:

• Remove the outdoor unit’s cover to access the electrical wires.
• Take off the top cover to reveal the control board.

3. Locate the Control Board and Function Button:

• Find the LED display and function button on or near the control board. Some models may require removing an additional plastic cover.

4. Perform the CE Reset:

• Press and hold the function button for about 5 seconds until "CE" appears on the display.
• If a different error code appears, turn off the breaker for 5 minutes, then restore power and try again.

5. Reassemble the Unit:

• Replace all covers securely after the "CE" code is displayed.

6. Allow the System to Run:

• Let the system run undisturbed for 20 minutes to stabilize.

7. Resume Normal Operation:

• Use the remote to adjust functions and set your desired temperature.