Hydraulic Indoor Unit LED2 (Green) 10 Flashes, LED1 (Red) 4 Flashes - Outdoor unit pressure error

What does LED2 10 Flashes, LED1 4 Flashes mean?

This indicates an abnormal pressure condition detected within the outdoor unit, which could be due to issues with the refrigerant system.

• Refrigerant system issues (e.g., overcharge, undercharge, blockage).
• Faulty pressure sensor or switch.
• Condenser coil blockage restricting airflow.

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

   Check the outdoor unit coils for cleanliness and ensure no airflow obstructions.

3. 3

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

4. 4

   Contact a qualified service technician to check refrigerant pressures and the system.