Daikin Altherma HT - how to set the room temperature to be more stabile

[ufm]

I have the control unit in the room. It is set to 22°C. The problem (for me) is, that the temperature must drop for 0,5°C before system starts to heat, or it must be for 0,5°C above the actual setting before the system stops to heat.

Can this hysteresis be smaller?

[hyperion]

I am sure that you can adjust the hysteresis to be a larger value but I am not aware that you can reduce it below 0.5°C. This would create short cycliing in the system, which could be counter productive.