Daikin | Fan Coil

Error Code U6

Troubleshooting guide for the Daikin Fan Coil system fault U6.

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 units

Potential Causes & Solutions

  • Faulty wiring.
  • External factor (Noise etc.).
  • Defective indoor unit PCB.

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