ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner UE error code

Difficulty: Hard · Cost: $80–$300 · Duration: Requires professional service

The UE error means your Daikin air conditioner detected a transmission fault between the optional centralized control equipment and the indoor unit. This can also be triggered by a disconnected main controller setting connector, or a defective PCB in either the central remote controller or the indoor unit. Contact a qualified technician.

Common causes

  • Transmission error between centralized control equipment and indoor unit
  • Connector for setting the main controller is disconnected
  • Defective central remote controller PCB
  • Defective indoor unit PCB

How to fix it

  1. 1

    Contact a qualified technician to inspect the centralized control wiring and PCBs

Related Daikin Air Conditioner error codes

1

A0

An external protection device connected to the indoor unit has been activated

hard
2

A1

A fault was detected in the indoor unit PCB (control board)

hard
3

A3

The drain level control system has detected an abnormality — drain may be clogged

medium
4

A5

Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter

easy

UE error — frequently asked questions

What does the UE error mean on a Daikin air conditioner?

A communication fault was detected between the indoor unit and centralized control equipment

What causes the UE error?

The UE error is usually caused by: Transmission error between centralized control equipment and indoor unit; Connector for setting the main controller is disconnected; Defective central remote controller PCB; Defective indoor unit PCB.

Can I fix the UE 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 UE error?

Fixing the UE error on a Daikin air conditioner typically costs $80–$300, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my air conditioner with the UE error?

We'd recommend addressing the UE error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.