anytime you install a new controller you always hook up and make sure all the settings are set correctly. Yes when you get it and install it there will be default settings programmed into it to allow the unit to run so you can access it to change the programming to what the mfg had it set to at the factory for that unit.
According to what i see in my mitsu program this unit has an A/C controller on it.
I'm not aware of a handset capable of accessing this controller and the only suggestion the service literature has is the 'Diagnozer' program provided by MCFA.
There is an onboard way of changing the settings using the DRS switch and using the display and buttons. You'll need the service literature section covering the Setup Options.