Daikin | Packaged

Error Code AJ

Troubleshooting guide for the Daikin Packaged system fault AJ.

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 capacity setting (Indoor unit PCB)

Potential Causes & Solutions

  • The capacity setting adaptor was not installed when replacing PCB.
  • Defective indoor unit PCB.

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