Q: We need some information about the possibility for the system to mantain a specified temperature even though the room is not rented. This is what     we understand, I don't know if it is correct: opening 'SystemSet' window, 'System-settings' > 'Tempe parameter', these parameters are    fit for all rooms and when the season change, we have to change manually 'Hot/Cold' setting. In this window, for each RCU mode, we    specify the temperature and  the fan speed we want to mantain.
   (1) Question: What 'Temp mode': 'Hot/cold' or 'Blast' stand for?
Once we set global parameters, for each RCU we can set whether this temperature is enabled or not  from the selected room > device-info > Modify-RCU, 'TEMP Set' tab (for each RCU-mode).
   (2) Is this correct or we have misunderstood?

A: Yes! Your understand it in a correct way: 
   system setting temp---for all rooms ---yes! 
   RCU setting temp---for one room only---yes!
   When the season changes, we have to change manually 'Hot/Cold' setting ---yes!
   'Temp mode':  'Blast', 'Hot/cold' 
   Let us take the following air-condtioner's running mode as an example :