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  1. #1
    Join Date
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    Cool LG VRF system No Heating mode

    Hi

    I wondered if anybody could please help !!

    I have recently taken over a maintenance of a Vrf 2 x pipe system consisting of LG
    8 x ARNU15GCEA4 Floor standing units linked to
    1 x ARUN120LTE4 Condenser
    1 x wall controller

    All units work well in cooling mode.
    As soon as you change to heating the Heating icon displays for about 20 secs then the controller goes blank, there is no summer/winter switch fitted in the condenser.
    The same happens if you change the mode from the centralised controller.
    Auto mode say 30c set point, controller stays on auto but no heat from units

    LG suggested i put the controller on the 1st unit and see what happens from there but i ran out of time, there is a trend system linking a couple of the other systems but this one appears to not be linked although trend are coming in to check.

    Has anyone got any ideas of anything else i can do to check on the system ?

    Thanks

  2. #2
    Join Date
    Aug 2009
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    Re: LG VRF system No Heating mode

    How many outdoor units are combine together?

  3. #3
    Join Date
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    Re: LG VRF system No Heating mode

    Quote Originally Posted by Shibhrac View Post
    How many outdoor units are combine together?
    Hi

    Thanks for the message.

    Only one outdoor unit unit installed not this system.

  4. #4
    Join Date
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    Re: LG VRF system No Heating mode

    Never dabbled with the VRF's but the splits would do something similar because the outside air probe was reading too high.
    Health and safety first..........unless I'm in a hurry.

  5. #5
    Join Date
    Sep 2007
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    Split Croatia
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    Re: LG VRF system No Heating mode

    Check if all of the indoor units have closed switch of the filter section (must). Also check if all indoor units are on same operation mode (cooling, heating , dehumidification).

    Also, if outdoor temperature is above 18C it probably should not go in to heating mode!
    Now, when I am officialy citizen off EU, I am looking for decent job! For any job offer please check my profile!

  6. #6
    Join Date
    Oct 2001
    Location
    Nottingham UK
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    Re: LG VRF system No Heating mode

    Is the outdoor unit located Outdoors or Indoors (i.e. in a factory/warehouse area)?
    I'm back on the Pale

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