Cheers guys , my name is Alex and an owner of an IVT Ecolane heat pump . I want to tell you that I've struggled at the beginning with the controller that was provided with this heat pump . After a while I've looked for a solution and I managed to find someone that built a controller for me with an Arduino and an esp8266 . I want to tell you that now I have heating , cooling and dhw as options in the menu . I can set a certain flow temperature and the heat pump will keep it , I have attached a 3 way valve for hot water and the cooling option is useless for me as I have radiators inside my house . I can attach a room thermostat to the controller , it can be wireless , smart or wired and I can change the settings of the heat pump from my phone which is connected to the wi-fi's local network and by opening a browser where I can access the settings . I'm not trying to sell you the controller , all I wanted you to know is that is possible to obtain the same results with this pump as you would with a more expensive one that you pay considerable more . Cheers