Blue pulsation LED — Unit is in standby

What does blue pulsation mean?

The status indicator on your Daikin Altherma 3 H HT W shows a blue light pulsing every 5 seconds. This indicates the unit is currently not operating but is in standby mode, ready for use.

• Unit is powered on but not actively heating or cooling.
• System is waiting for a command or schedule.

Click steps to track your progress.

1. 1

   Check the home screen for the current operation mode.

2. 2

   If heating or cooling is desired, select the appropriate mode ('Heating', 'Cooling', or 'Automatic').

3. 3

   Ensure the thermostat or control system has a demand for heating or cooling.

4. 4

   If the unit should be running, verify settings in the 'Space heating/cooling' menu.