Daikin | Packaged

Error Code A4

Troubleshooting guide for the Daikin Packaged system fault A4.

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 freezing protection

Potential Causes & Solutions

  • Shortage of water volume.
  • Low water temperature setting.
  • Defective water temperature thermistor.

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