I have a manitowoc km-630 maf unit. It was unused for about a year and relocated. Upon firing the unit up, the potential relay clicks and stops and tries a few times. Run and start caps are good. The unit won't fire. I bought a hard start kit but I'm reluctant to use it because the setup already uses a hard start type setup. Any ideas what could be causing the compressor not to fire? I have checked everything. The only questionable part is pot relay. It's clicking. I'm thinking the compressor is locked up. Any advice?