Daikin | Chiller

Error Code U7

Troubleshooting guide for the Daikin Chiller system fault U7.

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 outdoor units or outdoor storage unit

Potential Causes & Solutions

  • Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unit Connection error of transmission wirings between outdoor units.
  • Defective outdoor unit PCB.

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