ErrorCodeDoctor
Daikin Air Conditioner L1 error code
The L1 error means your Daikin air conditioner detected a fault with the inverter PCB. This can be caused by defective compressor wiring, a defective outdoor unit fan motor, a blown fuse, or a defective inverter PCB itself. Contact a qualified technician.
Common causes
- Defective compressor wiring
- Defective outdoor unit fan motor
- Blown fuse on the inverter PCB
- Defective inverter PCB
How to fix it
-
1
Contact a qualified technician to inspect the inverter PCB, compressor wiring, and fan motor
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
L1 error — frequently asked questions
What does the L1 error mean on a Daikin air conditioner?
The inverter PCB has a fault
What causes the L1 error?
The L1 error is usually caused by: Defective compressor wiring; Defective outdoor unit fan motor; Blown fuse on the inverter PCB; Defective inverter PCB.
Can I fix the L1 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 L1 error?
Fixing the L1 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 L1 error?
We'd recommend addressing the L1 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.