Hydraulic Indoor Unit LED - Pump down operation

What does Continuous flashing (1 sec On / 1 sec Off) mean?

The indoor unit's interface LED flashes continuously (1 second on, 1 second off) when the system is performing a pump-down operation. This is a normal function, not an error state.

• The heat pump is performing a pump-down cycle.
• System is preparing for service or maintenance.

Click steps to track your progress.

1. 1

   Observe the unit to see if the operation completes naturally.

2. 2

   Do not interrupt the power supply unless instructed by a technician.

3. 3

   If the operation seems stuck or excessively long, consult the manual or a technician.