Who hasn’t heard of Daikin? They are a world-renowned air-conditioning brand known for reliability, energy efficiency, and cutting-edge technology. However, even the most robust cooling systems can occasionally glitch.
A full system reset can often resolve minor digital faults, such as uneven temperatures, an unresponsive remote control, or errors caused by a temporary power surge. Knowing how to reset your Daikin system is a handy skill to have—it can save you the cost of booking an HVAC technician for minor issues you can fix yourself.
There are several ways to reset a Daikin unit, depending on your model. In this blog post, we’ve put together a simple, step-by-step guide to help you reset your system and troubleshoot software-related issues at home.
Why and When to Reset Your Daikin AC
It is essential to understand why and when your Daikin air conditioner requires a reset. A simple reset can often resolve common issues without the need for a professional call-out. These include:
- Power Fluctuations or Blackouts: Sudden power surges or outages can "confuse" the control board, leading to system errors.
- Error Lights: The unit may stop operating and display a flashing light (fault code, indicating a temporary technical glitch.
- Remote Control Issues: The remote may become unresponsive or lose communication with the indoor head unit.
- Performance Drops: The unit fails to deliver effective heating or cooling despite being switched on.
- Performance Drops: The unit fails to deliver effective heating or cooling despite being switched on.
How to Reset a Daikin Air Conditioning System?
Method 1: Use the Remote Control for a Soft Reset
If your unit is powered on but still acting strangely, try a reset using the remote control. This is the simplest starting point, commonly known as a soft reset. Here is how to do it:
- Most Daikin remote controls have a small, recessed button labelled “Reset”. You may require a paperclip or a similar tool to press it.
- Point the remote at the indoor unit and press the Reset button. A beep indicates that the button has been pressed and the reset has begun.
- Turn the air conditioning unit off using the Power button, then turn it back on after waiting at least 30 seconds.
Method 2: Reboot for a Hard Reset
In case the above method does not work, you may need to perform a hard reset. This clears the internal memory and enables the system to perform a complete diagnostic check before restarting. Simply follow these steps:
- Turn off the Daikin system using the remote control.
- Locate the isolator switch on the wall near your outdoor condenser unit and turn it off. If you cannot find the isolator switch, turn off the AC circuit breaker on your main electrical switchboard.
- Wait at least 30 minutes to allow the electrical charge in the capacitors to dissipate fully.
- Flip the isolator switch or the circuit breaker back to the on position.
- Allow 5 minutes for the system to stabilise, then turn on the air conditioning unit using the remote control.
Method 3: Resetting the Fault Codes
Sometimes your Daikin unit will refuse to start because it has “locked in” an error code. You can often clear these by checking the specific fault.
How to Identify the Error:
- Hold the “Cancel” button on your remote for 5 seconds.
- The temperature display will change to a double zero (00).
- Press “Cancel” repeatedly. The remote will cycle through various codes (e.g., U4, L5, E7).
- When the unit emits a long beep, that is your active error code.
How to Clear the Code:
After performing the Hard Reset mentioned in Method 2, most temporary error codes will clear. If the code reappears immediately after a reset, it indicates a hardware fault that requires professional repair.
When a Reset Isn't Enough
While knowing how to reset Daikin air conditioning is a valuable skill, it isn’t a magic wand for mechanical failures. If you have reset the unit and the following symptoms persist, it’s time to call a licensed HVAC technician:
Reccurring Errors:
If the unit works for 10 minutes then shuts down with the same error code again.
Strange Noises:
Grinding, screeching, or loud banging from the outdoor unit.
Leaking Water:
Water dripping from the indoor unit usually indicates a blocked drain line, not a software glitch.
Burning Smell:
If you smell ozone or burning plastic, turn off the power at the breaker immediately and do not attempt a reset.
Learning how to reset Daikin air conditioning units can save you time, stress, and money. Start with a simple remote reset, and if that fails, move to a full power cycle via the isolator switch. If you encounter any of the issues mentioned above, call Surrey Air. Our technicians ensure your issues are fixed before they turn costly.
