Daikin · Altherma Heat Pumps
If no green light is visible above the room temperature symbol on the controller, the room temperature function is currently switched off. This prevents you from adjusting the room temperature settings.
Click steps to track your progress.
Locate the power button (on/off icon) on your controller.
Press the power button to switch the room temperature function ON.
Verify that a green light now appears above the room temperature symbol.
Attempt to adjust the room temperature settings again.