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  1. #1
    Join Date
    Dec 2006
    Location
    Henryville IN
    Posts
    248

    Mcquay chiller LLS

    Mcquay ALR145C sn 5yh8185401 Problem is one circuit will give me a low evaporator pressure alarm upon start up. Extracted charge and wieghed in specified charge. LLS is energizing on call, suction pressure does not raise above cut in level. No taps between LLS and TXV, how would I determine if I have a faulty LLS or a defective TXV? Cap tube to sensing bulb does not have any visible holes.

  2. #2
    Join Date
    Sep 2009
    Location
    Boyertown, Pa
    Posts
    50
    Does your LLSV have a stem that you can manually open it up and prove out the LLSV?

  3. #3
    Join Date
    Dec 2006
    Location
    Henryville IN
    Posts
    248
    unfortunally not, forgot to mention that in original post

  4. #4
    Join Date
    Apr 2012
    Location
    So. Fl.
    Posts
    57
    This may be too late for post, but tech. May not be aware of solenoid magnets on sale at most supply houses. Use it to check if stem is traveling (should click) when slipped over stem. Other techs in our crew have used it on chillers,purges, split and or remote evap/cond. coils. Also, makes it safe for recovering, since all power can now be tagged off. No need to worry about power to solenoids. Hope this helps all the guys out there.

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