What It Means
Drain Level Control System Abnormality.
Daikin Heat Reclaim Ventilator
Daikin Heat Reclaim Ventilator Error Code A3
Troubleshooting guide for the Daikin Heat Reclaim Ventilator system fault A3.
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Possible Causes
- Drain clogging, upward slope, etc.
- Defective drain pump.
- Defective float switch or short circuit connector.
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
Drain Level Control System Abnormality
All Recorded Causes
Drain clogging, upward slope, etc. Defective drain pump Defective float switch or short circuit connector
Verify Before Replacing Parts
- Confirm the exact Daikin model family and heat reclaim ventilator context before acting on a generic code description.
- Verify the sensor or thermistor reading against the expected range for the current operating condition, keeping in mind that drain clogging, upward slope, etc.
- Check the sensor harness and board connection before condemning the sensor itself; on Daikin units this is also where you'd confirm defective drain pump.
- After the correction, run the system long enough to confirm the heat reclaim ventilator fault does not return under normal load.
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