Often when servicing an HVACR system the technician finds a situation where the compressor’s apparent performance is questionable. Any number of possible scenarios and causes may lead to this such as a higher than expected suction pressure or possibly an excessive amp draw. In any case, after performing all the standard system checks and tests the question often becomes “Is the compressor doing what it’s designed to do?
To get to this point the tech may believe he has exhaust all of his resources and feels stumped as to why this pump isn’t operating as he feels it should. There’s one additional tool he is overlooking. The Compressor Performance Curve. [cy]