Carrier p3 series Owners And Installation Manual page 6

PRECAUTIONS
WARNING
Do not obstruct the front of the discharge
grille of both units.
This will block air flow, reduce the cooling
effect and may result in unit malfunction.
Keep heat sources away from the unit,
high temperature can cause damage.
In summer, if possible, prevent direct
sunlight from entering the room;
draw curtains or blinds.
4
Use the correct voltage.
Using voltage other than specified will
damage the unit.
Do not use the power cord as a means
of turning off the unit.