Results 1 to 10 of 10
  1. #1
    Join Date
    Aug 2011
    Location
    England
    Posts
    24
    Rep Power
    0

    Danfoss TL5F earth short?



    Hey there,

    So just repaired a bottle cooler, all well, running nicely, go for lunch, come back, tripped. Inspect, nothing to see, reset breaker and immediately pings and fuse blows. Bit odd, so did continuity on compressor, shorted to earth.

    Purely for arguments sake, removed protective earth, unit runs absolutely fine, apart from the casing is live. Chills right down, all fans on, everything as you would expect, but with a live earth.

    Obviously that was just for elimination purposes, however somehow, compressor is fully functional but shorted to earth. Anyone seen this?!



  2. #2
    Brian_UK's Avatar
    Brian_UK is offline Moderator I am starting to push the Mods: of RE Site Moderator : and general nice guy
    Join Date
    Mar 2001
    Location
    Dorset
    Age
    76
    Posts
    11,192
    Rep Power
    60

    Re: Danfoss TL5F earth short?

    Remind me not to be anywhere near you when you are testing electrics.
    Brian - Newton Abbot, Devon, UK
    Retired March 2015

  3. #3
    Join Date
    Feb 2009
    Location
    telford
    Posts
    2,097
    Rep Power
    33

    Re: Danfoss TL5F earth short?

    There was a violent blue flash! and we never saw him again?

  4. #4
    Join Date
    Apr 2008
    Location
    Southampton, England
    Age
    49
    Posts
    1,045
    Rep Power
    35

    Re: Danfoss TL5F earth short?

    Seen compressors to earth and that's as far as I've gone with it.
    Depending on how the compressor is damaged you would get different results.
    For example, if the windings have burnt then the start and/or run winding may be open circuit and also shorting to earth so nothing will run and case will be live.
    If as in your case the live near the terminals I guess, have perhaps some carbon tracking across to the body of the compressor then the windings are all good but obviously some of the live is going elsewhere.

    Cheers,
    Andy.
    Health and safety first..........unless I'm in a hurry.

  5. #5
    Join Date
    Aug 2011
    Location
    England
    Posts
    24
    Rep Power
    0

    Re: Danfoss TL5F earth short?

    To be fair I had to test functionality in order to be able to return with some info, however yeah ok I wouldn’t do it if anyone else was about! But, none the less it’s a return, a lot of the live is going elsewhere, in that all of it is going so either common has gone to earth and the windings are metering that way, or vice versa.

    It’s ok though, she won’t be blowing herself up soon!

  6. #6
    Join Date
    Aug 2011
    Location
    England
    Posts
    24
    Rep Power
    0

    Re: Danfoss TL5F earth short?

    Still bloody annoying it was only out of the box for a couple of hours!

  7. #7
    Join Date
    Feb 2009
    Location
    telford
    Posts
    2,097
    Rep Power
    33

    Re: Danfoss TL5F earth short?

    Dan Foss normally a good product, but where was it manufactured it would be interesting to know,they do care about their quality which is normally top standard.

  8. #8
    Join Date
    Aug 2011
    Location
    England
    Posts
    24
    Rep Power
    0

    Re: Danfoss TL5F earth short?

    I’ve sent them an email, and emailed the supplier as well cause I’m on good terms with them, especially as it pretty much did it out of the box. I can only imagine it was a faulty start unit or just that 1 out of 100 that had a problem. Cheers!

  9. #9
    Join Date
    Aug 2006
    Location
    england
    Age
    49
    Posts
    3,874
    Rep Power
    46

    Re: Danfoss TL5F earth short?

    Had a rebuilt semi hermetic do that after running over night, went back for warranty and when inspected they found a wire had been pinched during manufacture, heat etc from running finished off the pinched insulation and it shorted out, suspect something similar with your compressor or it would not run.
    Mostly found in Oxfordshire, UK :)

  10. #10
    Join Date
    Aug 2011
    Location
    England
    Posts
    24
    Rep Power
    0

    Re: Danfoss TL5F earth short?

    Quote Originally Posted by monkey spanners View Post
    Had a rebuilt semi hermetic do that after running over night, went back for warranty and when inspected they found a wire had been pinched during manufacture, heat etc from running finished off the pinched insulation and it shorted out, suspect something similar with your compressor or it would not run.
    Thanks! I was thinking either a coil or maybe insulation but your history makes a lot more sense!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •