The compressor is the heart of any air conditioning or refrigeration system, so when it starts showing signs of not working correctly, technicians must act quickly in order to find out what is wrong.

A good digital multimeter (DMM) is key to diagnosing compressor problems in general. For instance, in a previous article (May 15 issue of The NEWS) we discussed using the DMM to read suction and ...

One of the plant's four plant air compressors blew a 100A fuse. The other two fuses are OK. After a few incidents where "blind fuse replacement" resulted in equipment damage, the plant engineer issued ...