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  1. #1
    Join Date
    Nov 2009
    Location
    Cairo, Egypt, Egypt
    Posts
    31

    electronic expansion valve

    does any one know howto deal with electronic expansion valve?

  2. #2
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    In what context?
    If more government is the answer, then it's a really stupid question.

  3. #3
    Join Date
    Nov 2009
    Location
    Cairo, Egypt, Egypt
    Posts
    31
    i have a uniflair DX units in a data center
    and a Carl expansion valve on it

  4. #4
    Join Date
    Aug 2004
    Location
    North Richland Hills, Texas
    Posts
    14,915
    Ok, but what do you mean by "deal with"?

    We can't read your mind.
    If more government is the answer, then it's a really stupid question.

  5. #5
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,793
    Moved to tech to tech commercial.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  6. #6
    Join Date
    Aug 2006
    Location
    Ohio
    Posts
    2,094
    Yes, I know how to deal with them.

  7. #7
    Join Date
    Nov 2009
    Location
    Cairo, Egypt, Egypt
    Posts
    31
    i have a problem with this unit that give me low pressure alarm and my charge is ok and also my compressor is ok but i am not sure about signal that recieved to expansionto open it if any one helping me ,i will be thanks for him

  8. #8
    Join Date
    Mar 2003
    Posts
    7,326
    Guessing you might have an electronic valve with a superheat controller. lets say its a sporlan for example. there is a sensor in the suction line, and both sensor and valve get wired back to controller somewhere. the controller needs to be looked at to see if sensor is reading correctly, and if it is set right. for many, you need a manual, and in some cases, a display module to troubleshoot issues. google the device or post it here, lots of guys know "how to deal with them".

  9. #9
    Join Date
    Feb 2012
    Location
    Upstate SC
    Posts
    84
    You need to get some lit. on the machine or you are shooting in the dark. My typical experience is that the valve is getting a 0 - 10 VDC signal from a logic board that is getting a signal from a thermistor. Something could be wrong with any three of those components.

  10. #10
    Join Date
    Jan 2008
    Location
    LEHIGH VALLEY, PA
    Posts
    166
    EEV OR SOMETIMES CALLED LEEV, are used on mini splits , vrv, s . from the literature you will get a resistance reading across the coil head , if that ohms ok check the output voltage off the board , mind you the connections are minute you will need minature or sub minature test leads , that wiil clarify the electrical side of an eev

  11. #11
    Join Date
    Jul 2007
    Location
    Tulsa, OK
    Posts
    990
    Only use a very high quality DMM, and with a fresh battery or batteries, and very good condition test leads etc. These valves are typically 500 steps between 0 to 10 v's DC as mentioned. Tolerances of the sensors is very minute so a slightly oxidized connection will make radical changes in it's valve response etc.

    However they are the future and are not going away that is for sure!

  12. #12
    Join Date
    Mar 2003
    Posts
    7,326
    EEV's are used all over the place, not just on mini's or vrv's. they are commonplace these days. you will need lit on whichever one you are playing with, along with the display on some models.

  13. #13
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,946
    Quote Originally Posted by flange View Post
    EEV's are used all over the place, not just on mini's or vrv's. they are commonplace these days. you will need lit on whichever one you are playing with, along with the display on some models.
    Sometimes, they are a simple PC interface.

    I'm liking them so far.

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