What It Means
Malfunction of thermal storage tank water level.
Daikin Split & Multi-Split
Daikin Split & Multi-Split Error Code HJ
Troubleshooting guide for the Daikin Split & Multi-Split system fault HJ.
Possible Causes
- Low water level.
- Defective switch setting.
- Water level detecting sensor failure.
- Defective connector contact.
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 thermal storage tank water level
All Recorded Causes
Low water level Defective switch setting Water level detecting sensor failure Defective connector contact
Verify Before Replacing Parts
- Confirm the exact Daikin model family and split/ multi split 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 low water level.
- Check the sensor harness and board connection before condemning the sensor itself; on Daikin units this is also where you'd confirm defective switch setting.
- After the correction, run the system long enough to confirm the split/ multi split fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Split & Multi-Split diagnostics step-by-step — so you confirm the cause before swapping parts.
