From A to Z about L4 error code on Daikin air conditioners: Causes, solutions, and prevention | Mytour.vn

Causes of L4 error code on Daikin air conditioners

There are 3 main causes of Daikin air conditioners showing L4 error code: Abnormal increase in temperature at the heat sink fins; faulty temperature sensor at the heat sink fins; and malfunctioning outdoor unit circuit board. Specifically:

- Abnormal increase in temperature at the heat sink fins: This situation arises due to improper installation of the air conditioner outdoor unit causing the heat sink fins to accumulate temperature over time. When the temperature of the heat sink fins rises above 93ºC, it interrupts the air conditioning process and triggers the L4 error code.

- Malfunctioning outdoor unit circuit board: A malfunction in the circuit board of the outdoor unit can also lead to the L4 error code on Daikin air conditioners.

- Due to malfunctioning outdoor unit circuit board: When the outdoor unit circuit board is damaged or the cooling component fails to regulate temperature, it can cause abnormal temperature fluctuations. Consequently, the temperature of the inverter heat sink fins suddenly increases, causing the air conditioner to stop working and display the L4 error code.

How to troubleshoot L4 error code on Daikin air conditioners

The L4 error code on Daikin air conditioners is common but troubleshooting it involves the outdoor unit, making it not a simple fix. Therefore, if you lack expertise and knowledge in refrigeration, it's advisable not to attempt repairs yourself as it may worsen the situation. Instead, call a professional air conditioner repair technician or contact the manufacturer's service center for the best support.

If you have experience and knowledge in refrigeration and have the necessary tools for air conditioner repairs, you can troubleshoot the L4 error code following these instructions:

- Check the installation position of the outdoor unit to ensure it is done correctly. If not, adjust it accordingly.

- Check the temperature at the heat sink fins. If the fins are damaged, they need to be replaced.

- Use a multimeter to test the temperature sensor component of the heat sink fins. If this component is faulty, it also needs to be replaced.

- If both the heat sink fins and temperature sensor components are functioning normally, you need to check the outdoor unit circuit board for any damage. If it's slightly damaged, you can repair it, but if it's severely damaged, it's best to replace it to ensure the stable operation of the unit.

Some tips to prevent L4 error on Daikin air conditioners

One of the main reasons for Daikin air conditioners showing the L4 error code is improper installation of the outdoor unit. Therefore, when installing the air conditioner, pay attention to:

- Avoid installing the outdoor unit too close to the wall. Maintain a minimum distance of 5cm, and the distance from the opposite wall should be at least 60cm.

- Do not place the outdoor unit directly on the ground.

- Place the outdoor unit lower than the indoor unit.

- If you must place the outdoor unit higher than the indoor unit, use an oil trap to ensure proper installation.

- The ideal distance between the pipes connecting the outdoor and indoor units is between 3 to 7 meters.

Ensure the outdoor unit mounting brackets are securely fixed to prevent vibration or falling during operation.

Above are the details of symptoms, causes, troubleshooting, and prevention of the L4 error code on Daikin air conditioners. Wishing you success in resolving the issue!