What It Means
Malfunction of electronic expansion valve coil.
Daikin SkyAir
Daikin SkyAir Error Code E9
Troubleshooting guide for the Daikin SkyAir system fault E9.
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Possible Causes
- Disconnection of connectors from electronic expansion valves.
- Defective electronic expansion valve coil.
- Defective outdoor unit control 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 electronic expansion valve coil
All Recorded Causes
Disconnection of connectors from electronic expansion valves Defective electronic expansion valve coil Defective outdoor unit control PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and skyair context before acting on a generic code description.
- Confirm filter condition, blower operation, and coil cleanliness before replacing any controls — start by ruling out whether disconnection of connectors from electronic expansion valves.
- Measure airflow-related readings that match the symptom, such as temperature split or static pressure, and check whether defective electronic expansion valve coil.
- After the correction, run the system long enough to confirm the skyair fault does not return under normal load.
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