Please give me answer

Hi, super heat and sub cooling are forms of system pressures. If they are not correct, they cant burn out a compressor. Different size compressors require different settings. For instance, to check the super heat on a running a/c, install manifold gauges. Write down what your pressure is on the low side gauge is for instance like 65 p.s.i. Now convert it to temperature. It will tell you on the scale right under the 65 lets say for freon R-22 would be at 38 degrees. You will need a digital thermometer to strap to the suction line of the unit you are checking. If the temperature of the line was lets say, 45 degrees, you would subtract 38 degrees from line temp of 45 and your super heat would be 7 degrees. Sub cooling is a hole different ball game. You have to be a certified tech to even check freon pressures and what you are asking. There is no set capacity I can give you. You have to set these conditions when charging any air conditioning. I hope this has cleared up your question? Best of luck,
Shastalaker7

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