In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...

Got a motor down? No matter how urgent the problem — and motor failure can cause some very urgent problems — always develop a plan of attack before you start repair work. Gather up any background ...

As we mentioned at the end of last month's motor quiz, we are focusing on HVACR motor troubleshooting specifics. This month we will discuss troubleshooting if the motor isn't rotating; next month we ...