What It Means
Malfunction of suction pipe thermistor.
Daikin Packaged Unit
Daikin Packaged Unit Error Code J5
Troubleshooting guide for the Daikin Packaged Unit system fault J5.
Possible Causes
- Defective connection of thermistor.
- Defective suction pipe thermistor.
- Defective outdoor unit 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 suction pipe thermistor
All Recorded Causes
Defective connection of thermistor Defective suction pipe thermistor Defective outdoor unit PCB
Verify Before Replacing Parts
- Confirm the exact Daikin model family and packaged 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 defective connection of thermistor.
- Check the sensor harness and board connection before condemning the sensor itself; on Daikin units this is also where you'd confirm defective suction pipe thermistor.
- After the correction, run the system long enough to confirm the packaged fault does not return under normal load.
Still unsure about this fault?
ACLogics walks you through Daikin Packaged Unit diagnostics step-by-step — so you confirm the cause before swapping parts.
