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HI Everyone , I have Gree Concealed duct type AC units , runing on R-a , what are the working pressures for thea on the liquid side and on the suction side ( all tech have there own ideas what the pressure should be ) , how we come to a conclusion that the system charge is ok the problem is that the units are not cooling at all ( thermostat set at-C and room temp stays at-C the other day i took the following reading on a4 ton ac unit high side pressure : psi high side actual line temp near the indoor unit : C low side psi low side actual line temp on suction : C lets say i have a freshly vacuum unit i need to charge , what parameters should i be looking at inorder to now that chrage is ok , the unit have electric expansion valves plus the outdoor unit have no details for subcooling and the mentioned opr/press id very high , * Attachment *
