Aircondition. I have a air conditioner problems, the unite inside the house is working I can hear

Question

I have a air conditioner problems, the unite inside the house is working I can hear it and feels the air coming out of the vent but it's not getting cool air, the unite outside all I hear is click once and about 2 to 3 mint. click again. I have the other air condition next to and it click and then seem to locked and worked. help..