Daikin | Packaged

Error Code A9

Troubleshooting guide for the Daikin Packaged system fault A9.

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 electronic expansion valve

Potential Causes & Solutions

  • Defective electronic expansion valve coil.
  • Defective indoor unit PCB.
  • Defective relay cables.

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