Input might be utilized by external heat pump to enable heating or cooling only.


Configuration > I/O allocation settings > Digital inputs > Cooling/(Heating) changeover 1 (2)



If this digital input is allocated then it is used to enable changeover heating or cooling signal.


DI "on" - disable heating / enable cooling

DI "off" - enable heating / disable cooling


If the input has not been configured, change-over is handled by the internal controller signal.


Related topics:


Changeover function