Daikin | Heat Reclaim Ventilator

Error Code AF

Troubleshooting guide for the Daikin Heat Reclaim Ventilator system fault AF.

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 a humidifier system

Potential Causes & Solutions

  • Humidifier unit (optional accessory) leaking.
  • Defective drain piping (upward slope, etc.).
  • Defective indoor unit PCB.

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