Yes, the changeover can be made in the menu of the room thermostat.
Select menu item 9-7-1 and select mode 3 (cooling function) and then either I for the internal sensor or E for an external sensor.
The room thermostat will turn on the relay in this mode when the actual temperature exceeds the set temperature. For example, you can turn on an air conditioner or open valves that cool rooms in conjunction with a heat pump.