ErrorCodeDoctor
Daikin Air Conditioner UC error code
The UC error means your Daikin air conditioner system detected a duplicate address in the centralized control equipment. Each unit in a centralized control system must have a unique address. Contact a qualified technician to correct the address settings.
Common causes
- Address duplication in the centralized control equipment
- Defective indoor unit PCB
How to fix it
-
1
Contact a qualified technician to identify and correct the duplicate address setting
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
UC error — frequently asked questions
What does the UC error mean on a Daikin air conditioner?
A duplicate address was detected in the centralized control equipment
What causes the UC error?
The UC error is usually caused by: Address duplication in the centralized control equipment; Defective indoor unit PCB.
Can I fix the UC 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 UC error?
Fixing the UC error on a Daikin air conditioner typically costs $80–$200, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the UC error?
We'd recommend addressing the UC error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.