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Daikin Air Conditioner Flashing Green Light

When it comes to choosing air conditioners with reliability and advanced technology the Daikin Air Conditioners are best at providing efficient cooling solutions for homes and businesses. However, like any electronic device, they may encounter issues from time to time. One common problem users face is the Daikin air conditioner flashing a green light. This blog will give you exposure to the possible reasons behind this indicator, delve into the significance of error codes, and offer troubleshooting tips to help you address the issue effectively.

Understanding the Green Light

The green light on your Daikin air conditioner is an indicator, that conveys essential information about the unit’s status. A flashing green light typically indicates a system anomaly or malfunction that requires attention. To diagnose the issue accurately, it is crucial to decipher the accompanying error codes.

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Troubleshooting Steps for Daikin Air Conditioner Flashing Green Light

  1. Check for Obstructions:

Ensure that there are no obstructions around the indoor and outdoor units. Restricted airflow can lead to overheating and trigger error codes.

  1. Inspect Air Filters:

Dirty or clogged air filters can impede airflow and reduce the unit’s efficiency. Clean or replace filters regularly to maintain optimal performance.

  1. Verify Thermostat Settings:

Confirm that the thermostat settings are appropriate for your comfort needs. Incorrect settings can cause the unit to operate inefficiently.

  1. Examine Refrigerant Levels:

Low refrigerant levels can lead to freezing issues. Consult a professional technician to check and recharge refrigerant levels if necessary.

  1. Inspect Wiring and Connections:

Check for loose or damaged wiring in both the indoor and outdoor units. Faulty connections can cause electrical malfunctions.

  1. Reset the Unit:

Power off the air conditioner, wait for a few minutes, and then restart it. This simple reset may resolve temporary glitches.

  1. Address Drainage Issues:

Clear any clogs in the drain pipe to prevent the U4 float switch error. Proper drainage is crucial to avoid water damage.

Decoding Daikin Air Conditioner Error Codes

Daikin air conditioners use a sophisticated system of error codes to communicate specific issues. These codes are displayed through flashing lights on the unit’s control panel. Here are some common error codes and their meanings:

A1 – Indoor PCB Malfunction: This error suggests a problem with the indoor unit’s circuit board. A wiring issue, a faulty PCB, or other electrical issues may cause it.

A3 – Fan Motor Malfunction: When the fan motor encounters problems, such as a lack of rotation or abnormal speed, the A3 error code will be triggered. This can be due to a faulty motor or issues with the capacitor.

A5 – Freeze Prevention: The A5 error indicates that the unit is operating in cooling mode, but the evaporator is freezing. This may result from reduced airflow or low refrigerant levels.

U4 – Float Switch Problem: The U4 error signifies an issue with the float switch, typically caused by a clogged drain pipe. This error prevents water overflow and potential damage to the unit.

H6 – Malfunction of position detection sensor: This error relates to a problem with the swing motor or position detection sensor in the air discharge flap. It may cause irregular air distribution.

What is Wrong with Your Aircon?

Decode your air conditioner’s distress with the malfunction code list in your manual. The flashing green light signals trouble in the outside unit – a fan obstruction triggering fault mode. Despite sixteen attempts to fix it, if the issue persists, the indoor unit gracefully shuts down, spotlighting the green light.

In the manual, E7 translates to a motor overrun – the fan struggles with an obstacle. This coded message tells a tale of resilience, troubleshooting, and a graceful acknowledgment of a mechanical impasse. You’re not just facing a green light; you’re deciphering a narrative from your air conditioning system.

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Fix it:

Having identified the E7 fault in your air conditioner, the remedy is straightforward. Head to the outside unit and clear any obstruction hindering the fan. Numerous issues could trigger the green light, and your manual provides tailored instructions for each.

After fixing the problem, the final step is to reset the fault. Locate your aircon’s switchboard, find the corresponding switch, turn it off for ten to fifteen seconds, and then power it back on.

While the blinking green light on your Daikin aircon may signal various issues, most are easily manageable. Once you’ve pinpointed the malfunction number, consulting your manual becomes a simple guide to self-repair. If challenges persist, don’t hesitate to seek assistance from a professional aircon technician.


A flashing green light on your Daikin air conditioner should not be ignored, as it often indicates an underlying issue that requires attention. By understanding the error codes and following the suggested troubleshooting steps, you can address common problems and ensure the continued efficient operation of your Daikin air conditioning unit. If issues persist or if you are unsure about the troubleshooting process, it is advisable to seek professional assistance from certified HVAC technicians here at DGB Refrigeration Heating & Cooling to diagnose and resolve the problem accurately. Regular maintenance and prompt attention to error codes will contribute to the longevity and reliability of your Daikin air conditioner.

 So don’t hesitate to get in touch with us. Our experienced technicians at DGB Refrigeration Heating & Cooling are always at your service. Dial 03 7038 6918 and stay cool all summer long!


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