Fiat 500 Owner's Manual page 189

UNDERSTANDING YOUR INSTRUMENT PANEL 189
Vacation Storage
Anytime you store your vehicle, or keep it out of service
(i.e., vacation) for two weeks or more, run the air
conditioning system at idle for about five minutes in the
fresh air using the high blower setting. This will ensure
adequate system lubrication to minimize the possibility
of compressor damage when the system is started again.
4