Greetings friends hey, I have a 2 x 2 x 2 chamber cavity and I have a 2hp semi sealed unit, with a 2hp diffuser, the expansion valve has a # 4 hole that is the one that asks me for the capacity of the compressor. The valve tells me that it comes to work in a temperature range of -40 to +10, the compressor consumes 15Amp now when it works, I can not get it to -15, I had to close the valve a little because it was returning to me the liquid closed and the pressure was 20/225 psi and reheating in grade 9. but the temperature does not drop me more than -1 What dou you recommend?