How to Reset Daikin Outdoor Unit: A Comprehensive Guide

Resetting a Daikin outdoor unit can be a crucial step in troubleshooting and restoring the proper functioning of your air conditioning system. This comprehensive guide will walk you through the step-by-step process of resetting your Daikin outdoor unit, providing you with the technical details and expert-level insights to ensure a successful reset.

Locating the Reset Button

The first step in resetting your Daikin outdoor unit is to locate the reset button. This button is typically found on the unit’s Printed Circuit Board (PCB), which is usually located on the side or bottom of the outdoor unit. The reset button is often a small, recessed button that requires a tool, such as a paperclip or a small screwdriver, to press.

Accessing the PCB

how to reset daikin outdoor unitImage source: Daikin Air Conditioner Outdoor by Dinkun Chen

To access the PCB and locate the reset button, you will need to remove the outer casing of the outdoor unit. This process may vary depending on the specific model of your Daikin unit, so it’s essential to refer to the manufacturer’s instructions or consult a professional HVAC technician if you’re unsure about the process.

Once you’ve accessed the PCB, you’ll need to identify the reset button. It’s important to note that the location and appearance of the reset button may differ across Daikin models, so it’s crucial to carefully inspect the PCB to ensure you’ve identified the correct button.

Pressing and Holding the Reset Button

With the reset button located, the next step is to press and hold it for approximately 20 seconds. During this time, the outdoor unit should begin the reset process, which may involve the unit finding the connected indoor units (FCUs) after a period of time.

It’s essential to maintain a steady pressure on the reset button throughout the 20-second duration to ensure the reset process is initiated correctly. Avoid releasing the button prematurely, as this may interrupt the reset sequence and prevent the unit from completing the process successfully.

Waiting for the Reset Process

After releasing the reset button, the outdoor unit will begin the reset process. This process may take several minutes to complete, and during this time, you may hear unusual noises or observe the unit behaving differently than its normal operation.

It’s crucial to be patient and allow the unit to complete the reset process without interruption. Attempting to power the unit on or interfere with the reset process may result in further issues or damage to the system.

Verifying the Reset and Restoring Operation

Once the reset process is complete, you can power on the outdoor unit and check its operation. Ensure that the unit is functioning correctly and that all connected indoor units (FCUs) are communicating with the outdoor unit as expected.

If the unit continues to exhibit issues or fails to operate correctly after the reset, it’s recommended to contact a Daikin representative or a professional HVAC technician for further assistance. They can provide additional troubleshooting steps or recommend any necessary repairs or maintenance to restore the system to its optimal performance.

Additional Considerations

  • The reset process may vary depending on the specific model of the Daikin outdoor unit, so it’s essential to refer to the manufacturer’s instructions or consult a professional for guidance.
  • The reset button is typically located on the outdoor unit’s PCB, which is usually found on the side or bottom of the unit.
  • The reset process may take several minutes, and the unit may make unusual noises during this time. This is normal and should not be a cause for concern.
  • If the unit continues to have issues after the reset, it’s important to contact a professional HVAC technician to avoid further damage to the unit.


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