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  1. #14
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    Aug 2006
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    st.petersburg,fl
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    806
    That will not do any good on a compressor (single phase)...I havent seen that thread but you could do more damage then good when you bring capacitors in the mix...
    Isn't sanity just a one-trick pony anyway? I mean, all you get is that one trick, rational thinking, but when you're good and crazy, well, the sky's the limit!

  2. #15
    Join Date
    Jan 2010
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    Go to ( Bad Compressor ) last post was at 7:00 PM today.

  3. #16
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    Oct 2008
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    837
    Quote Originally Posted by skpkey9 View Post
    ECtofix : well its kind of like this...
    say you have a customer that you just changed a compressor on their system and you found out the reason was that they used an extension cord ( undersized wire ) and loss of compressor was do to voltage drop... now you explained tp them why they could not use an extension cord...couple of days pass and they call back saying unit isn't cooling, you arrive to find the same extension cord hooked up and they want it changed under warranty.... same with manufactures they say dedicated circuit with no GFI....and I have been asked before.
    Man, if I'm looking for any possible solutions to a problem, this is the right place. That's why I come here.

    HOWEVER, it was MY extension cord. I was merely circumventing the inaccessibility the condenser's dedicated outlet built into the freezer. I'd already isolated the problem to the condenser, I was merely replacing thermostat's function by BEING the thermostat with my extension cord - for testing purposes only. Same thing applies regarding MY GFCI doohicky - which rests once again inside my toolbox.

    Quote Originally Posted by VTP99 View Post
    Try the reverse trick. What do you have to lose ?
    Compressor isn't locked up. It trips the breaker. Besides, I thought YOU were going to be the one to try that.

    Quote Originally Posted by VTP99 View Post
    Skpkey,
    There's another thread going about reversing single phase. Basically reversing the start and run windings.
    Actually, I'm the one who said that and ultimately hijacked that thread.

    SIDE NOTE: Logging in here on this forum makes me remember the days when my company's techs "reported in" each morning by gathering at the warehouse's picnic table. The discussions there were always educational, often funny and sometimes turned into a debate fed by a bunch of brainiac technicians. We got so much from those gatherings that we'd show up for work 30-45 minutes EARLY. Our launch time was 7:45; then we'd all jump into our vans to go off our separate ways to be someone's hero.
    One of the guys summed it up by saying he learned more in those minutes of our morning gatherings than he EVER could through the rest of his day.

    Now we all set off for our first calls from our homes. It's a rare treat to find two or more of us at the shop simultaneously.


    "You never know what others don't know." -

    If I can't laugh at myself...then I'll laugh at YOU! -

  4. #17
    Join Date
    Jan 2010
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    6,835
    EC,
    Are you saying it starts then trips or trips instantly ? A locked rotor will trip the breaker this you know. I will try that trick but the opportunity is at hand for you now.

  5. #18
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    Aug 2006
    Location
    st.petersburg,fl
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    806
    ECtofix The extension cord thing was just an example to get you to understand why it could void a warranty thats all I was saying with that. its perfectly fine to do what you did everyone does it, but do you see where im coming from...
    Isn't sanity just a one-trick pony anyway? I mean, all you get is that one trick, rational thinking, but when you're good and crazy, well, the sky's the limit!

  6. #19
    Join Date
    Jan 2010
    Posts
    6,835
    Quote Originally Posted by skpkey9 View Post
    ECtofix The extension cord thing was just an example to get you to understand why it could void a warranty thats all I was saying with that. its perfectly fine to do what you did everyone does it, but do you see where im coming from...
    Skpkey,
    This is a good point. Lets hope some owners are listening with open ears. How many times have we seen 100 foot extension cords used to bridge a two foot gap between the equipment cord and the outlet ?

  7. #20
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    Aug 2006
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    st.petersburg,fl
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    806
    Heh Heh
    Isn't sanity just a one-trick pony anyway? I mean, all you get is that one trick, rational thinking, but when you're good and crazy, well, the sky's the limit!

  8. #21
    Join Date
    Oct 2008
    Posts
    837
    Quote Originally Posted by VTP99 View Post
    EC,
    Are you saying it starts then trips or trips instantly ? A locked rotor will trip the breaker this you know. I will try that trick but the opportunity is at hand for you now.
    I've always heard the hum of a locked compressor, then the click of the overload doing it's job in those situations.
    In this case, during my testing, RUN and START terminals are NOT connected. Merely having COMMON connected trips the breaker.


    Quote Originally Posted by skpkey9 View Post
    ECtofix The extension cord thing was just an example to get you to understand why it could void a warranty thats all I was saying with that. its perfectly fine to do what you did everyone does it, but do you see where im coming from...
    I'm with you 100% and appreciate the feedback and reinforcement. Had it not been for the maker of this unit I brought up (True Manufacturing) doing a roving training seminar, your point would've been new to me. ANY info you offer is appreciated.
    Speaking of TRUE, they are adamant about checking for and suspecting line drop. What leaves the service panel at 120v can easily translate to only 100v applied under load after delivery through hundreds of feet of inadequate building wiring. Dollar General stores are the worst.
    Regarding extension cords, I'll give a restaurant manager MORE than he/she wants to hear if I find an extension cord feeding their equipment. I usually get their attention explaining in $$$$s to replace what was once a perfectly good compressor destroyed with an extension cord.


    "You never know what others don't know." -

    If I can't laugh at myself...then I'll laugh at YOU! -

  9. #22
    Join Date
    Jul 2009
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    Connectitaxed
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    Sounds like you have done evrything you could to figure this dilemma out. The conlclusion is that the compressor is tripping...why? who knows at this point .change it out. I would be almost tempted to cut it open and take a look if I had the time and it was not warrantied.

  10. #23
    Join Date
    Dec 2006
    Location
    Middle Tennessee
    Posts
    11,347

    *

    it does sound like a locked rotor which will cause overamping and tripped breakers

    your megohmeter to the compressor case is an invalid test unless you removed a spot of paint off of the compressor

    testing tools are only as good as the people using them

    learn the difference between an electrically bad compressor, and a mechanically bad compressor



    .

  11. #24
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    Jul 2009
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    Quote Originally Posted by Airmechanical View Post
    it does sound like a locked rotor which will cause overamping and tripped breakers

    your megohmeter to the compressor case is an invalid test unless you removed a spot of paint off of the compressor

    testing tools are only as good as the people using them

    learn the difference between an electrically bad compressor, and a mechanically bad compressor



    .
    He has stated he will not attempt to bump it. Nothing more to do but change it.

  12. #25
    Join Date
    Sep 2009
    Location
    Arnold mo
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    3,978
    Quote Originally Posted by ECtofix View Post
    I've always heard the hum of a locked compressor, then the click of the overload doing it's job in those situations.
    In this case, during my testing, RUN and START terminals are NOT connected. Merely having COMMON connected trips the breaker.


    I'm with you 100% and appreciate the feedback and reinforcement. Had it not been for the maker of this unit I brought up (True Manufacturing) doing a roving training seminar, your point would've been new to me. ANY info you offer is appreciated.
    Speaking of TRUE, they are adamant about checking for and suspecting line drop. What leaves the service panel at 120v can easily translate to only 100v applied under load after delivery through hundreds of feet of inadequate building wiring. Dollar General stores are the worst.
    Regarding extension cords, I'll give a restaurant manager MORE than he/she wants to hear if I find an extension cord feeding their equipment. I usually get their attention explaining in $$$$s to replace what was once a perfectly good compressor destroyed with an extension cord.
    I guess I'm missing something here, but I've read through the thread & can't find it. How does it figure that a compressor is bad when it is a 115 v & only touching the common wire to the common terminal on the compressor trips the breaker WITHOUT any wires going to the run & start terminals on the compressor? Pardon the brain fart if this is what is happening to me.

  13. #26
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    Quote Originally Posted by tipsrfine View Post
    I guess I'm missing something here, but I've read through the thread & can't find it. How does it figure that a compressor is bad when it is a 115 v & only touching the common wire to the common terminal on the compressor trips the breaker WITHOUT any wires going to the run & start terminals on the compressor? Pardon the brain fart if this is what is happening to me.
    Good question....my original thought was that the compressor is locked up. Second would be grounded winding . Either way the compressor is down. I personally have never have a locked up compressor last for more than 3 months after bumping.

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