A Hot Compressor

摘要

Replacing a compressor is neither simple for a technician nor inexpensive for the customer. Before replacing a compressor, a technician needs to ensure that it is truly defective and that there is not another problem leading to the compressor not running or operating correctly. Unfortunately, sometimes good compressors get replaced as a result of a misdiagnosed problem. Here is one common scenario where a compressor may appear to be defective when in fact it is not: If a compressor has overheated and opened its internal overload, it will shut down and not run. If a technician arrives on the job when the compressor is still hot and performs a resistance check on it, he will find the resistance of one or more windings to be infinite. He may interpret this to be a permanent open winding and decide that the compressor needs to be replaced.