An indoor temperature sensor (an air thermistor) is located on the control panel to assist in temperature control. The main control temperature is the return air temperature sensor (also thermistor) at the return air of the indoor unit. Installed outdoors will indeed have a certain impact, the first is not convenient to operate, the second auxiliary control is also control. If you can put it back indoors, put it back.
The installer said that it is possible to give a remote control, but to install a receiver (remote control and receiver have temperature sensors), these are not the manufacturer's standard to add money. Need to negotiate with the installer