Daikin Chiller

Daikin Chiller Error Code 89

Troubleshooting guide for the Daikin Chiller system fault 89.

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What It Means

Malfunction of brazed-plate heat exchanger freezing.

Possible Causes

  • Dirty heat exchanger.
  • Shortage of refrigerant amount.
  • Defective thermistor.

Not sure which one it is — or if it's none of these? Try ACLogics today.

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.
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Full Diagnosis

Malfunction of brazed-plate heat exchanger freezing

All Recorded Causes

Dirty heat exchanger Shortage of refrigerant amount Defective thermistor

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and chiller context before acting on a generic code description.
  2. Verify airflow first, then confirm operating pressures and temperature relationship before adjusting charge, since dirty heat exchanger.
  3. Look for restrictions, iced coils, or dirty heat-transfer surfaces that can mimic a charge problem, and separately confirm shortage of refrigerant amount.
  4. After the correction, run the system long enough to confirm the chiller fault does not return under normal load.

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