Help with a problamatic Trane-immediately trips breaker

[lhabc]

I have an 8yr old Trane TTB042D100A 3 1/2 ton outdoor unit that suddenly died and will trip the breaker INSTANTLY when it starts. No hum or anything. Was working perfectly before. Wiring, low voltage, etc, checks ok.

The GE cap looks good and specs out 5/40uf.

There are no shorts to the case or lines from the terminals, but the compressor windings measure around 1 ohm or .2 ohms depending on which terminals you measure. Seems low, but I don't know the spec.

This is the tricky part, usually there is a short to the case that would cause the trip. That is why I still have hope.

Do you think a start kit can help this or its time for a new compressor? One tech said if it kills the breaker instantly its finished. Is it possible for a cap to spec out and cause this issue?

There may have been surges cause other electronic things were ruined around that time, but the A/C could be coincidental.

[iraqveteran]

What the hell???

Call a pro....and not the one that diagnosed your unit over the phone.

This is not a DIY site. Get a professional to look at your problem.

[lhabc]

What the hell???

Call a pro....and not the one that diagnosed your unit over the phone.

This is not a DIY site. Get a professional to look at your problem.

Well I apologize then, the "rules" say homeowners can post:

1. Who Is Welcome Here?

Anyone in the HVAC industry and home or building owners with HVAC/R concerns and other polite and fun people that are willing to contribute.

I had 2 "pros" come with two different opinions, One said its toast, the other said get a start kit. So I have an engineering background and I'm trying to figure out what is best to do.

I was thinking somehow the motor is sized and the SK capacitor can give it the extra phase shift to get it started, but then again considering other electrical devices in the house failed I bet it is toasted.

[RDP]

OP will be mad in a min.

[iraqveteran]

get a new pro......

an engineering backround doesn't give you the knowledge needed to accurately diagnose the problem....


but heres a bite of info to chew on....if it trips the breaker, then there are 1 or 2 things occuring. Its its not 1 then its the other. both have totally different solutions to the problem. But the problem is only 1.

I can't go any further. If the tech said you needed at start kit....why didn't he install one to see??? sounds like a load of crap to me.

But hey, what could I possibly know??? I'm only a service technician

[iraqveteran]

Well I apologize then, the "rules" say homeowners can post:

1. Who Is Welcome Here?

Anyone in the HVAC industry and home or building owners with HVAC/R concerns and other polite and fun people that are willing to contribute.

I had 2 "pros" come with two different opinions, One said its toast, the other said get a start kit. So I have an engineering background and I'm trying to figure out what is best to do.

I was thinking somehow the motor is sized and the SK capacitor can give it the extra phase shift to get it started, but then again considering other electrical devices in the house failed I bet it is toasted.

They sure do......but they also say this.......





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[git-r-dun]

How high of an OHM scale do you have on your meter? If you know what megaohms are you'll figure it out, if not call a qualified person, preferably in the HVAC industry.

[beachtech]

So I have an engineering background

yea, so

what you come up with

i say find a better technician. in less than 5 minutes i can tell you whats wrong with it and it sure isn't a start kit

although depending on what made it fail and exactly what failed a start kit may be needed...

[beenthere]

A hard start kit won't help it.

Its done for.

[iraqveteran]

A hard start kit won't help it.

Its done for.

Thanks for making my point

[beenthere]

Thanks for making my point

LOL...

Posted at the ame time.


Hey, you had fun with that other guy.

[iraqveteran]

LOL...

Posted at the ame time.


Hey, you had fun with that other guy.

which one???

Mr been doin this 15 years and still can't diagnose a TXV??? Had fun for a few posts......then just went off into nowhere with it. Its was fun. Till Bob ruined it for us

[RDP]

which one???

Mr been doin this 15 years and still can't diagnose a TXV??? Had fun for a few posts......then just went off into nowhere with it. Its was fun. Till Bob ruined it for us

It went some where just don't know where.