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  1. #1
    Join Date
    Oct 2003
    Posts
    134
    can anyone help with a question or two please?

    During defrost on a Hussmann case, mod. rca 5lu-do the fans go off during defrost? If they're supposed to, but keep running, what may be the cause?

    thank you.

  2. #2
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215
    Yes, they should, and a bad fan relay or Klixon will cause this.

  3. #3
    Join Date
    Aug 2002
    Posts
    6,047
    Originally posted by condenseddave
    Yes, they should, and a bad fan relay or Klixon will cause this.
    Is that the relay at the case, located under the kickplate?

  4. #4
    Join Date
    Feb 2003
    Posts
    1,166
    I'm guessing thats an older glass door freezer case. CARAC?
    if so the fans should turn off during defrost. Go to
    http://www.hussmann.com and click on "products" then "technical info" for impact cases, then go to "reachins" and click on "RL" to get a 6 page pdf. file on similar new cases, it has wiring diagrams for both electric and hot gas defrost, yours should be similar to this. Could be you have a faulty fan relay or if hot gas defrost a faulty fan relay or klixon or the case could be wired wrong.
    Watts New, Ohm My, I been Electrically Commutated. Are U2.

  5. #5
    Join Date
    Apr 2004
    Posts
    18
    older reachins use kilxons for antisweat and light on one and fan on another with defrost termination on a third. fan relays are used on the newer model cases form the vision and impact line of Hussmann reach in freezers.

    [Edited by smbore on 04-29-2004 at 12:26 AM]

  6. #6
    Join Date
    Aug 2002
    Location
    Orange County CA
    Posts
    1,084

    Relay help?

    There's 2 relays in kickplate/raceway.1 is for defrost fans off action. The 208/230v relay coil is powered by def heaters.
    When heaters energized,relay opens fan power.

    The 2nd relay is for fan delay.The 110v coil for this relay is fed through klixon by TXV. I believe this klixon is "close on rise"...I always get RL cases and RCA klixon operation confused.

    Hope this helps
    It looks worse than it is. Good Luck.

  7. #7
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
    Posts
    13,215

    Re: Relay help?

    Originally posted by NedFlanders

    It looks worse than it is. Good Luck.
    Then what does he need luck for?

    It's Hussmann. It really is as bad as it looks.

  8. #8
    Join Date
    Oct 2003
    Posts
    134

    thank you all very much for your help.

    thanks. i'm still learnin'!

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