Results 1 to 3 of 3
  1. #1
    Join Date
    Apr 2008
    Location
    Georgia
    Posts
    8

    Smile YORK YCAS0330E issues

    Kennesaw State here again,

    We have two of these beasts here...issues after last year replacing 3 of 6 compressors. About a month now we have been expereincing 1 unit with 1 compressor shutting down on "hi motor current", unit 2 has 2 compressors shutting down with no errors, yet sending my Siemens Apogee an alarm regardless, "Alarm -On" . Unit one gives alarm and the "hi motor current" alarm at panel, BMS just legit alarm. HELP!!

    We have had York, an two other companies service these things over the last several years, and I am looking for solutions where it does not cost us a new compressor. Open to all, listen to all. Any links please do not ask me to email you. I am looking for the service manaul, not the 88 page overall setup, what it does manual.

    Mike

  2. #2
    Join Date
    Sep 2007
    Location
    Somewhere in the world.
    Posts
    1,576

    High Motor Current

    High Compressor Motor Current Cutout:
    The High Motor Current Safety protects against excessively
    high motor current and shuts a system down and
    locks it out after only a single occurrence of a rise in
    average motor current above the cutout point. Motor
    current is monitored using 3 Current Transformers
    (CTs) per motor, one on each phase.
    Average motor current is monitored after 7 seconds of
    compressor operation. The system will be shut down if
    average motor current exceeds 115% FLA.
    Low Motor Current Cutout / Motor Protector (Hi
    Motor Winding Temp Cutout) / Mechanical High
    Pressure Cutout / External Motor Overload:
    FLA (full load amps) is approximately
    1.2 x RLA (rated load amps). RLA is
    specified on the motor / chiller nameplate
    and is typical current demand under
    rated operating conditions in a
    fully loaded system. When a system is
    fully loaded, typical motor currents
    may be at 60 - 85% FLA depending on
    operating conditions.

    You might want to check or have someone qualified to check the MP module settings in micro and module they may be set incorrectly.
    Arguing with your Boss is like wrestling with a pig in
    mud.
    After a while you realize that while you are getting
    dirty, the pig is actually enjoying it.

    It is not exactly cheating, I prefer to consider it
    creative problem solving.

    25 years ago we had Bob Hope , Steve Jobs , and Johnny Cash today we have no Hope no Jobs and no Cash !
    I can fix broke but i can't fix stupid !

  3. #3
    Join Date
    May 2011
    Location
    New York
    Posts
    304
    Quote Originally Posted by SilverWolf View Post
    Kennesaw State here again,

    We have two of these beasts here...issues after last year replacing 3 of 6 compressors. About a month now we have been expereincing 1 unit with 1 compressor shutting down on "hi motor current", unit 2 has 2 compressors shutting down with no errors, yet sending my Siemens Apogee an alarm regardless, "Alarm -On" . Unit one gives alarm and the "hi motor current" alarm at panel, BMS just legit alarm. HELP!!
    Mike
    You need to monitor the 2 units a little more closely to be sure

    Whats the actual amperage when #1 shuts down ?
    Have the CT's been calibrated ?
    Why is the #2 shutting both comps, and do they both shut at the same time ?

    too many loose ends here ........

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event