Daikin | Fan Coil

Error Code U5

Troubleshooting guide for the Daikin Fan Coil system fault U5.

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.

System Diagnosis

Malfunction of transmission between indoor unit and remote controller

Potential Causes & Solutions

  • Transmission error between indoor unit and remote controller.
  • Connection of 2 main remote controllers (when using 2 remote controllers).
  • Defective indoor unit PCB.
  • Defective remote controller PCB.
  • Transmission error caused by noise.

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