Daikin Chiller

Daikin Chiller Error Code UE

Troubleshooting guide for the Daikin Chiller system fault UE.

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What It Means

Malfunction of transmission between indoor unit and centralized control equipment.

Possible Causes

  • Transmission error between optional controllers for centralized control equipment and indoor unit.
  • Connector for setting main controller is disconnected.(or disconnection of connector for independent / combined use changeover switch.).
  • Defective PCB for central remote controller.
  • Defective indoor unit PCB.

Not sure which one it is — or if it's none of these? Try ACLogics today.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.
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Full Diagnosis

Malfunction of transmission between indoor unit and centralized control equipment

All Recorded Causes

Transmission error between optional controllers for centralized control equipment and indoor unit Connector for setting main controller is disconnected.(or disconnection of connector for independent / combined use changeover switch.) Defective PCB for central remote controller Defective indoor unit PCB

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and chiller context before acting on a generic code description.
  2. Verify current draw, overload status, and control signal before condemning the compressor or drive, given that transmission error between optional controllers for centralized control equipment and indo….
  3. Look for upstream conditions such as airflow or charge issues that may be pushing the compressor into protection, and check connector for setting main controller is disconnected.(or disconnection of connector for i….
  4. After the correction, run the system long enough to confirm the chiller fault does not return under normal load.

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