Daikin split system air conditioner code J8: Liquid pipe sensor fault
Split system air conditioner, Australia
The temperature sensor on the liquid pipe is not working properly.
This needs a licensed air conditioning technician. There is nothing safe to check yourself. Leave the covers on and book a professional.
Only some models show this code. Check the list below.
What causes it
-
The liquid pipe sensor or its wiring has failed. A licensed technician must diagnose it.
How to read this code on your unit
A fault shows as a blinking lamp on the indoor unit, the OPERATION lamp on most models or the multi-monitor lamp on Zena FTXJ-PVMA. To read the code, point the remote at the indoor unit and hold its Cancel button for about 5 seconds, until 00 blinks in the temperature display section. Then press Cancel again and again until the remote answers with a long beep; the code in the temperature display at that moment is the stored fault. A short beep means the code on show is not a stored fault. To clear the display, hold Cancel for 5 seconds, or leave the remote untouched for a minute. The manuals say a fault must be handled by a licensed installer or the dealer, so write the code down before you call.
Booking a licensed air conditioning technician
Book a licensed air conditioning technicianlicensed air conditioning technician
- Do not open any panels. Refrigerant circuits must only be opened by a licensed technician.
- Note the code, which unit shows it (indoor or outdoor), and the model numbers of both units.
- Book a licensed air conditioning technician and give them those details.
Models that show this code
35 models in 3 ranges
| Range | Models |
|---|---|
| Alira X FTXM-W1VMA | FTXM20W1VMA, FTXM25W1VMA, FTXM35W1VMA, FTXM46W1VMA, FTXM50W1VMA, FTXM60W1VMA, FTXM71W1VMA |
| Alira X FTXM/FTKM-W2VMA | FTXM20W2VMA, FTXM25W2VMA, FTXM35W2VMA, FTXM46W2VMA, FTXM50W2VMA, FTXM60W2VMA, FTXM71W2VMA, FTKM20W2VMA, FTKM25W2VMA, FTKM35W2VMA, FTKM46W2VMA, FTKM50W2VMA, FTKM60W2VMA, FTKM71W2VMA |
| Alira X FTXM/FTKM-WVMA | FTXM20WVMA, FTXM25WVMA, FTXM35WVMA, FTXM46WVMA, FTXM50WVMA, FTXM60WVMA, FTXM71WVMA, FTKM20WVMA, FTKM25WVMA, FTKM35WVMA, FTKM46WVMA, FTKM50WVMA, FTKM60WVMA, FTKM71WVMA |
Where this comes from
Checked against the manufacturer's manual on 17 October 2026.
Other Daikin split system air conditioner codes
| Code | Meaning | What you can do |
|---|---|---|
| C4 | Indoor coil temperature sensor fault | Call a pro |
| C9 | Room temperature sensor fault | Call a pro |
| H6 | Position detection sensor fault | Call a pro |
| H8 | DC current or voltage sensor fault | Call a pro |
| H9 | Outdoor air temperature sensor fault | Call a pro |
| J3 | Discharge pipe sensor fault | Call a pro |
| J6 | Outdoor coil temperature sensor fault | Call a pro |
| L3 | Electrical parts overheating | Call a pro |
| L4 | Inverter heatsink overheating | Call a pro |
| L5 | Inverter output overcurrent | Call a pro |
| P4 | Heatsink temperature sensor fault | Call a pro |
| U0 | System short of refrigerant | Call a pro |