Daikin | Chiller

Error Code 73

Troubleshooting guide for the Daikin Chiller system fault 73.

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

System No. 2 Actuation of high pressure switch (HPS)

Potential Causes & Solutions

  • Dirty heat exchanger.
  • Shortage of water volume.
  • Clogged refrigerant piping.
  • Defective connector contact.
  • Defective HPS.

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