LEDs Continuous flashing (1 sec On / 1 sec Off) — Pump down operation

What does Pump down operation mean?

Both green and red LEDs are continuously flashing, alternating on and off every second. This is not an error but an indication that the heat pump is performing a 'pump down' operation, typically to recover refrigerant for maintenance or to protect the system.

• Initiated manually by a technician for service.
• System performing an automatic pump down cycle for protection under specific conditions.

Click steps to track your progress.

1. 1

   Do not interrupt the system; allow the pump down operation to complete naturally.

2. 2

   If this status persists for an unusually long time, consult your installation manual or a qualified technician.

3. 3

   Ensure that no maintenance or repair work is performed on the refrigerant circuit while this operation is in progress.