Carrier make model no is 42SD6B the problwm is when the unit is running it run's for only 4 min then it's shuttdown give the error code 3 after 3 min. it's starting automitcally again it trip after 4min giving the error code 3. So I just want to know what is this code stand for, what precaution should I take to solve this problem.

Heating & Cooling - Carrier - 38CKC036 Air Conditioner