Daikin | Packaged

Error Code E4

Troubleshooting guide for the Daikin Packaged system fault E4.

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

Actuation of low pressure switch (LPS)

Potential Causes & Solutions

  • Abnormally drop in low pressure.
  • Defective low pressure sensor.
  • Defective outdoor unit PCB.
  • Defective connector contact.

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