Heltun Heating Thermostat - can't set parameters using automations

Hi
I have 2 Heltun Heathing Thermostats which I can manage using the UI, mean I can set temp or mode such as heating/away etc.

However when I try the same in an automation it get executed without an error but nothing happens.

For instance I try the following:
Set Value of Config Parameter 9 (input/output config) to the value 5 (Away), nothing happens

Any advise?

Thanks
Daniel