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  1. #53
    Join Date
    Nov 2012
    Posts
    23
    type 240 vac

  2. #54
    Join Date
    Nov 2012
    Posts
    23
    typo it is a 60 hz 240 Vac system, the model number is ZR61 PFV 950 if my memory serves correctly, in any case thanks for all your suggestions

  3. #55
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,566
    Your fix story is a good example of why one can never assume the wiring is good.

    It also underscores the chesnut that Arthur Conan Doyle wrote for his character, Sherlock Holmes, that "... when you have eliminated the impossible, whatever remains, however improbable, must be the truth..."
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  4. #56
    Join Date
    Apr 2012
    Location
    Louisiana
    Posts
    745
    Also shows why you need to hire a tech. This would have been found and fixed in about 10 mins several compressors ago.

  5. #57
    Join Date
    Nov 2012
    Posts
    23
    this did not cause the other compressor failures...as I said it will take a long time to describe all the alterations that we have done to fix this system. Some techs are good some just want to sell you parts. I do not know many who understand this type of system. Few have experince with anything but simple split systems. Sorry that is the way it is in this part of the country.

  6. #58
    Join Date
    Nov 2011
    Location
    USA
    Posts
    406
    Quote Originally Posted by Butch1234 View Post
    yes it is 60hz 3540 Vac
    but more importantly

    FIXED !!!!!!!!!!!!!

    figured I will just replace a short (~10”) factory lead from the secondary side of the contactor to the run capacitor.

    So after I replaced this short lead I restarted the unit and it ran smooth.
    I got lots of respect for engineers. Had I gone to an engineering school, I might well have been one. But what isn't taught or learned in engineering classes, is all the empirical knowledge one acquires doing service work in the field.

    Had one of the experienced guys here been with you, they would have instinctively measured the auxiliary winding current early on, saw it was non-existent, then looked for the cause and discovered the open conductor...in a matter of minutes. You, however, assured us in post #6 that the wiring had been checked, re-checked and couldn't be the problem.

    Next time somebody tells you to check the wiring...

    Check the frickin' wiring!!!

  7. #59
    Join Date
    Nov 2008
    Location
    Bristol Va.
    Posts
    633
    Quote Originally Posted by Butch1234 View Post
    Some techs are good some just want to sell you parts. I do not know many who understand this type of system. Few have experince with anything but simple split systems.
    And this is not a DIY thread? A service tech andy service tech would have known .5a on a run cap. for a compressor is too low and would have gone the distance to find out why. Not just to SELL YOU PARTS that you you don't need. As if you needed 6 or however many compressors. I like my Industry to be insulted by the homeowners that CAN FIX ALL OF THEIR OWN STUFF becouse we either charge to do the work, are not smart enough to figure out the problem or asre out just to rip people off. Nice Butch1234. Glad you figured it out I guess we should follow your example and become an engineer so we can fix HVAC systems faster and easier.

    dogboy

  8. #60
    Join Date
    Nov 2012
    Posts
    23
    I learned a long time ago to never argue with a fool, people will not know the difference. Actually, the three lead motor currents were measured several weeks ago and were presented to the manufacturer's "expert" on these compressors and he had nothing to say. I suggest you review Copeland literature and perhaps you can find a place where they discsuss the various currents. When asked about this, the factory rep said that the current was measured in the common leg (black in this case) and when asked what the component parts should be he had no idea. Yes someone might have spotted this problem sooner....but at the time I posted this several days ago we had already fixed several other issues and this one was nagging. The contractor that installed the system did not know because his "manuals" are silent on these readings.
    I thank those that gave suggestions....as far as opinions we all have them...second guessing is fun but not always productive.,...thanks

  9. #61
    Join Date
    Feb 2006
    Location
    Phoenix,AZ
    Posts
    2,895
    Was the CPR added to lower the amps?

  10. #62
    Join Date
    Nov 2011
    Location
    USA
    Posts
    406
    Quote Originally Posted by Butch1234 View Post
    this did not cause the other compressor failures...as I said it will take a long time to describe all the alterations that we have done to fix this system. Some techs are good some just want to sell you parts. I do not know many who understand this type of system. Few have experince with anything but simple split systems. Sorry that is the way it is in this part of the country.

    It appears that most here understand the system far better than you...

    Heat pumps are heat pumps, Dude...you provide enough information and somebody here can tell you what it should be doing and/or why it isn't doing it.

    You got a diagnosis over the internet didn't you? That ain't too shabby.

  11. #63
    Join Date
    Nov 2008
    Location
    Bristol Va.
    Posts
    633
    Quote Originally Posted by Butch1234 View Post
    Actually, the three lead motor currents were measured several weeks ago and were presented to the manufacturer's "expert" on these compressors and he had nothing to say. I suggest you review Copeland literature and perhaps you can find a place where they discsuss the various currents. When asked about this, the factory rep said that the current was measured in the common leg (black in this case) and when asked what the component parts should be he had no idea.
    I guess I am just stupid as I generally check all 3 legs (amps) of a motor when I have one leg that is too high.

    dogboy

  12. #64
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,566
    Quote Originally Posted by DOGBOY View Post
    I guess I am just stupid as I generally check all 3 legs (amps) of a motor when I have one leg that is too high.

    dogboy
    No, you just do this more often. Maybe in his area there are some techs who are not as experienced.

  13. #65
    Join Date
    Feb 2004
    Location
    British Columbia, Canada
    Posts
    530
    Or maybe he just doesn't LISTEN and take advice from experts in the trade as shown throughout this thread.

    Butch1234:
    Thanks for the timely compressor model number (you think) after your problem is solved. If we were charging you for this work we would have had to charge extra because you were "helping".

    How soon do you think you'll be writing up a description of everything you went through on this system previously?

    I can't wait.

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