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  1. 01-08-2009, 01:55 PM #1
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    jurekorgurek
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    low evaporator chiller water flow & chiller water overdue alarm



    Hi all,

    Please help me how to solve this alarm?

    Thanks very much


  2. 01-08-2009, 02:26 PM #2
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    Re: low evaporator chiller water flow & chiller water overdue alarm

    Are your chilled water pumps running?
    The difference between genius and stupidity is that genius has its limits.

    Marc
  3. 01-08-2009, 03:22 PM #3
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    Re: low evaporator chiller water flow & chiller water overdue alarm

    Quote Originally Posted by marc5180 View Post
    Are your chilled water pumps running?
    yes, It control by VFD.
    Does this critical alarm?
  4. 01-08-2009, 05:21 PM #4
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    Sandro Baptista
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    Re: low evaporator chiller water flow & chiller water overdue alarm

    We need more data...

    The alarm is actived based in what circunstances? low water flow? low outlet chilled water?

    Are the pumps "feeling" a big pressure at the outlet maybe by a clogged filter or stop valve closed?
    This would mades the VFD down the flow rate if the operating VFD is based on the pressure. However if the operating of the VFD is based on the differential pressure (pump outlet minus inlet) this shouldn' happened

    Give us more information

    Baptista
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  5. 02-08-2009, 10:34 AM #5
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    Re: low evaporator chiller water flow & chiller water overdue alarm

    hey,
    whats your minimum hz on your drive? your drive should not go below 15hz. also do you have any faults on your vfd?
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