ErrorCodeDoctor
Daikin Air Conditioner LC error code
The LC error means your Daikin air conditioner detected a communication failure between the outdoor unit control PCB and the inverter PCB. This can be caused by a defective connection between the PCBs, external noise, a defective inverter compressor, or a defective control PCB. Contact a qualified technician.
Common causes
- Defective connection between the inverter PCB and the control PCB
- External factors such as noise
- Defective inverter compressor
- Defective control PCB transmission block
How to fix it
-
1
Contact a qualified technician to inspect the connection between the control PCB and inverter PCB
Related Daikin Air Conditioner error codes
A0
An external protection device connected to the indoor unit has been activated
A1
A fault was detected in the indoor unit PCB (control board)
A3
The drain level control system has detected an abnormality — drain may be clogged
A5
Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter
LC error — frequently asked questions
What does the LC error mean on a Daikin air conditioner?
A communication fault was detected between the control PCB and the inverter PCB
What causes the LC error?
The LC error is usually caused by: Defective connection between the inverter PCB and the control PCB; External factors such as noise; Defective inverter compressor; Defective control PCB transmission block.
Can I fix the LC error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the LC error?
Fixing the LC error on a Daikin air conditioner typically costs $150–$500, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the LC error?
We'd recommend addressing the LC error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.