Daikin | Chiller

Error Code H3

Troubleshooting guide for the Daikin Chiller system fault H3.

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 high pressure switch (HPS)

Potential Causes & Solutions

  • Defective high pressure switch.
  • Broken wire.
  • Defective outdoor unit PCB.
  • Defective connector contact.

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