Hydraulic Indoor Unit LED2 (Green) 10 Flashes, LED1 (Red) 5 Flashes - Low pressure abnormal

What does LED2 10 Flashes, LED1 5 Flashes mean?

This indicates that the refrigerant pressure in the system has dropped to an abnormally low level. The outdoor unit may also show '20 Flashes' for low pressure abnormal after pressing the ENTER switch.

• Refrigerant leak in the system.
• Restriction in the refrigerant line.
• Faulty low-pressure sensor.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

2. 2

   If the outdoor unit ERROR LED is blinking, press the ENTER switch to confirm the specific '20 Flashes' error code.

3. 3

   If the error persists, use the 'Reset HP' function (Line 6711) in the control system.

4. 4

   Contact a qualified service technician immediately to check for refrigerant leaks and system pressure.