Daikin aircon Error code
Strange error codes appearing on your Daikin aircon display? Don’t panic-these error codes are the aircon’s way of telling you that there is something wrong. They can be either a minor issue or something more serious. By identifying the code, you decide whether it is a matter of a quick fix or time to call in people who know what they are doing.
We have helped hundreds of Singapore homeowners and businesses troubleshoot and repair Daikin aircon systems. This guide will explain some of the most common Daikin error codes and what you should do next.
Refer: Aircon servicing
What Are Daikin Error Codes?
Daikin aircon machinery is equipped with high-tech diagnostic capabilities. If an issue arises with the machine, the unit will display the error code on the remote control or the indoor unit’s panel. These codes are alphanumeric (e.g., U4, L5, A3) and signal concrete issues in the system.
Common Daikin Aircon Error Codes and Their Meanings
U4 – Communication Error
What it means: Either a signal is missing or corrupted between the indoor and the outdoor units.
What to do: Shut off the power for a couple of minutes and bring up the system again. If the error recurs, better get professional help from SGAircon.
A1–Indoor PCB Fault
What it means: There may be a fault in the PCB of the indoor unit.
What to do: In most cases, you require a technician to come out and inspect or replace the PCB.
L5–Compressor Lock
What it means: The compressor is not running properly motor-wise or electrical-wise.
What to do: Turn off the aircon; do not use it until a technician inspects it to prevent further damage.
A3–Drain Level Error
What it means: The condensate (water) is not draining properly, which can be due to a blocked or faulty drain pump.
What to do: Clean the drain pipe if possible. If the error persists, then professional servicing is needed.
C4–Faulty Temperature Sensor
What it means: The thermistor/temperature sensor may be faulty.
What to do: Sensor issues require professionals to test, probably for replacement.
E5-Overload or Overcurrent
What it means: Overcurrent or overload is detected in the compressor or in the fan motor.
What to do: Turn the unit off immediately and call a technician. If you keep using it, it could cause several major damages.
What Should You Do When You See an Error Code?
- Turn off your aircon to prevent further damage.
- Note the exact error code and when it appeared.
- Call a certified technician from SGAircon for fast and reliable diagnosis.
Never try to fix internal components yourself—it could be dangerous and may void your warranty.
Why Choose SGAircon for Daikin Aircon Repair in Singapore?
✔️ Trained technicians with experience in all Daikin models
✔️ Fast response times across the island
✔️ Affordable diagnostics and repair packages
✔️ Transparent pricing – no hidden fees
✔️ Trusted by homeowners, offices, and commercial buildings
Whether it’s a minor error or a complete system failure, our team is here to help.
Need Help with a Daikin Error Code?
Call SGAircon today or book your service online. We’ll troubleshoot the issue, explain the fix, and get your aircon running smoothly again—fast.
Serving all of Singapore with professional aircon servicing, repair & maintenance.
Conclusion
Daikin aircon error codes can be confusing, but they don’t have to be stressful. With the right knowledge and support from SGAircon, you can quickly resolve issues and maintain a cool, comfortable space all year round.