Error 44 — High pressure detected in system

What does [44] High pressure detected in system mean?

This error indicates that the system's high pressure has been detected as being too high. This can happen if the indoor pipe temperature and outdoor pipe temperature are too low in cooling mode, or if the outdoor temperatures are too low when heating.

• High pressure sensor reading is incorrect
• Too much refrigerant in the system
• Blocked liquid line piping
• Outdoor unit cannot start heating due to the electronic expansion valve not opening
• Operating environment is outside the allowed range

Click steps to track your progress.

1. 1

   Check if the pressure switch wiring is connected correctly.

2. 2

   Use a multimeter to check if the high pressure switch is short-circuited.

3. 3

   Ensure the Electronic Expansion Valve (EEV) coil wiring is correct and firmly in place.

4. 4

   Open the service valve if it is closed.

5. 5

   Check if the piping system is clogged and clean it if necessary.

6. 6

   Replace the pressure sensor if it is faulty.