Daikin Fan Coil

Daikin Fan Coil Error Code M1

Troubleshooting guide for the Daikin Fan Coil system fault M1.

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What It Means

Malfunction of central remote controller PCB.

Possible Causes

  • Defective central remote controller PCB.

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 central remote controller PCB

All Recorded Causes

Defective central remote controller PCB

Verify Before Replacing Parts

  1. Confirm the exact Daikin model family and fan coil context before acting on a generic code description.
  2. Confirm filter condition, blower operation, and coil cleanliness before replacing any controls — start by ruling out whether defective central remote controller PCB.
  3. Measure airflow-related readings that match the symptom, such as temperature split or static pressure, and check whether the next candidate on the list.
  4. After the correction, run the system long enough to confirm the fan coil fault does not return under normal load.

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