Whether you are working on a 1½ ton unit or a 50-ton unit, the principles of the refrigeration cycle is the same. The most important thing to remember about compressors is that they are VAPOR PUMPS. Compressors do not like liquid in them. Liquid will damage valves, wash out oil leading to bearing failure, and break down the windings of a compressor. The suction line should contain vapor and the discharge line puts out vapor.
Let’s look at a normally operating refrigeration cycle. By understanding what is normal, it is easier to detect when there is a problem.
This class will cover diagnostic troubleshooting of the mechanical refrigeration system. We will evaluate system problems by systematically determining causes and effect when different components in the system malfunction.