Daikin | Chiller

Error Code 91

Troubleshooting guide for the Daikin Chiller system fault 91.

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 Malfunction of electronic expansion valve

Potential Causes & Solutions

  • Defective connector contact.
  • Defective electronic expansion valve coil.

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