I installed a 4 Ton Weather King heat pump and matching AHU. It was installed in July, so we set up the charge in the cooling mode. It worked great. I get a call in Febuary that the thing is not working right. I check it out and the compressor is dead. So I replace the compressor and set up the charge in heating mode. I checked the cooling mode and it was low. In short when the charge is right in heating it is to low for cooling and when it is right in cooling it is too high in heating. Any one have any ideas?