ErrorCodeDoctor
Daikin Air Conditioner E5 error code
The E5 error means your Daikin air conditioner's inverter compressor motor has overheated or is mechanically locked. This is a serious fault — the compressor is the heart of the refrigeration system. Contact a qualified technician urgently.
Common causes
- Inverter compressor has locked mechanically
- High differential pressure across the compressor
- Defective inverter PCB
- Incorrect UVW wiring connection
- Defective connector contact
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
E5 error — frequently asked questions
What does the E5 error mean on a Daikin air conditioner?
The inverter compressor motor overheated or is locked
What causes the E5 error?
The E5 error is usually caused by: Inverter compressor has locked mechanically; High differential pressure across the compressor; Defective inverter PCB; Incorrect UVW wiring connection; Defective connector contact.
Can I fix the E5 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 E5 error?
Fixing the E5 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 E5 error?
We'd recommend addressing the E5 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.