Three-phase and single-phase motors are similar in their
operation. Since each of the motors has some parts that are different,
there are a few differences in the tests that should be made for each
motor. The troubleshooting procedure should be broken into several sections.
These sections are based on the types of symptoms the motor presents
when it's not operating correctly. The procedures listed in this section
are presented in sequence of the problems that are most likely to occur
to problems that are least likely to occur. You should adopt the same
type of philosophy when you begin to troubleshoot the motor. You should
always begin by looking for the faults that are most likely to occur, and move on to faults that are least likely to occur. You should also
perform simple tests first and complex tests later. This type of procedure
will allow you to find the majority of problems or faults with the simple
tests.