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  1. #1
    Join Date
    Sep 2006
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    Default split system cables

    My new air conditioner is an LG inverter. Yet to be installed. I'm wondering about the cables. I'm replacing an older sanyo system that had an 8 wire cable between the indoor unit and the outdoor unit. This one just has a 3 pin plug on the indoor unit and 3 or 4 hardwire connections on the outdoor unit. So if thats just power, how do the units "communicate" with each other.

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  3. #2
    Join Date
    Sep 2007
    Location
    Thailand
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    Default

    Quote Originally Posted by zelig View Post
    My new air conditioner is an LG inverter. Yet to be installed. I'm wondering about the cables. I'm replacing an older sanyo system that had an 8 wire cable between the indoor unit and the outdoor unit. This one just has a 3 pin plug on the indoor unit and 3 or 4 hardwire connections on the outdoor unit. So if thats just power, how do the units "communicate" with each other.

    Have you tried the "internet"? If not, "Google" may be of some use.
    “I do not think there is any thrill that can go through the human heart like that felt by the inventor as he sees some creation of the brain unfolding to success... Such emotions make a man forget food, sleep, friends, love, everything.” - Nikola Tesla.

  4. #3
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    Sep 2006
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    sydney
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    Default

    Quote Originally Posted by elkangorito View Post
    Have you tried the "internet"? If not, "Google" may be of some use.
    Didn't think of that. Thanks.

  5. #4
    Join Date
    Feb 2007
    Location
    Murrumba Downs, QLD, Australia
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    37

    Default

    Some of the units I used to work on.
    Fujitsu.
    Use to put a Signal into the 240v lines between the two units to communicate.
    It kind of looks like a spike when looking at it with an oscilloscope.

    Tricky stuff.

    It might be doing that.

    lpg_falcon.

  6. #5
    Join Date
    Sep 2006
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    sydney
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    Default

    Hey I worked this out in the end. The manual says "connect the wires between the 2 units" basically. I reckon the lack of explanation is to prevent DIY. I had to run a 4 wire cable between the units. +,-, gnd and the 4th communication i presume. There was a small drawing of it etched in the plastic.

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