If the compressor and outside fan are not working, and the furnace fan is working, then I would check that for power to the compressor. Specifically, the outside compressor is on a separate circuit from your main furnace, and on new installations, both an outside disconnect and an inside disconnect should be present. It is recommended that you turn these breakers off for the winter, and on again in the spring/summer.
As such, make sure all the breakers / switches are on, and the fuses (if any) are okay.