In the "Automation / Zones State" I see for the zone where I placed the device that the selected scene is the "normal temperature schedule" In this same overview I can effectively set the Cooler/Warmer. But under "DEvice Control / Thermostats" I still get the error if I try Cooler/Warmer.
So I raised the temperature with 3 degrees. The status view for Thermostats says "21 grd C (0+3+18). That is wrong, because my daily schedule is set to 16 grd C at this very moment.
This different behaviour in different screens is very confusing. Essentially it means that I can not control the schedule automatically.
Discussions about existing Z-Wave device and their usage with Z-Way/Z-Cloud/Z-Box