I have five wires coming from house , white, yellow, red, green and blue. They got cut by a shovel and I need to hook them up. There are two main wires coming out of unit that they connect to. Which ones go where?

When you say central air unit are you referring to the condensing unit? If so most commonly red and white. Do you have a volt ohm meter? Set t-stat to call for cooling and check for 24volts...