ErrorCodeDoctor
Daikin Air Conditioner L5 error code
The L5 error means your Daikin air conditioner's inverter detected an instantaneous overcurrent on the DC output. This is commonly caused by a defective compressor coil, a mechanically locked compressor, or a faulty inverter PCB. Contact a qualified technician urgently.
Common causes
- Compressor coil has a wiring disconnection or insulation failure
- Compressor has mechanically locked and failed to start
- Inverter PCB has malfunctioned
How to fix it
-
1
Contact a qualified technician urgently to inspect the compressor 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
L5 error — frequently asked questions
What does the L5 error mean on a Daikin air conditioner?
The inverter detected an instantaneous overcurrent from the DC output
What causes the L5 error?
The L5 error is usually caused by: Compressor coil has a wiring disconnection or insulation failure; Compressor has mechanically locked and failed to start; Inverter PCB has malfunctioned.
Can I fix the L5 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 L5 error?
Fixing the L5 error on a Daikin air conditioner typically costs $300–$1500, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the L5 error?
We'd recommend addressing the L5 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.