The Expert settings tab is shown in the figure below.
The figure only shows a part of the user interface.
The Expert settings tab allows you to
make the fan speed settings of the ventilation unit
make the sensor settings of the ventilation unit
make the defrosting settings of the ventilation unit
make the Modbus settings of the ventilation unit
make the input settings of the ventilation unit
make the relay settings of the ventilation unit
set the configuration number of the ventilation unit
save and restore settings
make the parental control settings of the ventilation unit.