Daikin | Chiller

Error Code J4

Troubleshooting guide for the Daikin Chiller system fault J4.

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 low pressure equivalent saturated temperature sensor system

Potential Causes & Solutions

  • Defective connection of thermistor.
  • Defective thermistor.
  • Defective outdoor unit PCB.

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