Liebert Mini Mate Lockout Problem
Results 1 to 6 of 6
  1. #1
    Join Date
    May 2004
    Posts
    56
    I have a Liebert Mini Mate 2 ton unit about 12 years old that keeps locking out. There's no indication on the board to give a clue why it locked out. Any suggestions on how to trouble shoot or identify what it trips on? It happens about once a week.

  2. #2
    Join Date
    Oct 2002
    Posts
    970
    Check the evap drain or cond pump, been burned by that float before. If I remember correctly it's a lock-out circuit that kills everything..including fan
    I work with the Chiller Whisperer...

  3. #3
    Join Date
    Dec 2003
    Location
    Kenilworth New Jersey
    Posts
    230
    Sonc is correct, the float in the pan, once made kills everything.

  4. #4
    Join Date
    Jun 2004
    Location
    Eugene, Oregon
    Posts
    1,018
    Had same problem before. turned out to be plugged drain line. By the time I was called all of the water had evaporated and there was no evidence of water in pan.
    "The bitterness of poor quality remains long after the sweetness of low price is forgotten". --Benjamin Franklin
    "Don't argue with an idiot, they will drag you down to their level and beat you with experience". --Mark Twain
    http://www.campbellmechanical.com

  5. #5
    sounds like the alarms are not set up to acknowledge any problems. you can test by physically lifting the float switch in the pan and the one in the condensate pump if equiped with a pump. the safety switch for the pump ties into tb1-8,tbi-9

  6. #6
    Join Date
    Aug 2004
    Location
    Maryland
    Posts
    62
    If this is a package unit and not a split, on a Liebert that old, a high pressure switch trip also locks out the entire unit. Also check to make sure the condensate drain is not double trapped. Not sure about a unit tht old but the untis produced in at least the last five years have an internal trap. If a trap is installed on the outside the unit won't drain till it trips on condensate overflow and the blower stops

    [Edited by servman on 08-07-2004 at 08:23 PM]

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