Possible a faulty thermostat .. or an incorrectly positioned thermostat..
Overload protector,
High presure cut out due to ..1). insufficient air
2). over charged.
3) Air in the system
low presure cut out due to 1). undercharge
2). restriction in the expansion device
The best advise I can give you is to take your aircon to a qualified technician....If you try to fix it yourself it might end up being more expensive..
paul
July 2006