A produs walk-in was down this morning.
I got very sick to my stomack on the way to that job accompanied with headache.so I decided to go home after checking that unit,I couldn`t spend anytime with detailed readings ,just wanted to find the problem as practically as possible and get outta there.compressor I believe was a 1.5 hp copeland.when I got there nothing was running.so I started with checking power ,LPC was open,no charge in system.Put some 409 jumped LPC.fan runs nice compressor wouldn`t.checked run and start caps,checked pot relay,checked windings ,nothing wrong.manually tried to start comp.and it starts for a couple of seconds.OL opens.
the run cap of the fan motor read open,very high MF,also high ohm resulting in open line.removed that 5 MF fan run cap everything runs fine..Put a new cap everything runs fine.fixed the leak at the exp.flare nut etc.Job done..
I couldn`t spend time to see what happened but would you guys think;
fan motor was drawing too much current because of bad cap
and comp.couldn`t start because of OL.But when I Jumped out pot relay it started ,couldn`t run...that doesn`t explain it.