Question about LG Art Cool LA181CNW Split System Air Conditioner

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Installed LG split system. The unit does not

Installed LG split system. The unit does not work. Tested voltage good on both L1 and L2 - 120 volts - #3 is the low voltage com line - reads 0 volts, should be 20-70 volts +/-. Replaced PCB, still nothing - Distributor sent new indoor unit, and still nothing - the outdoor unit fan will not start when I start the indoor unit - still get 0 volts on line #3. Any suggestions?

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Any chance that you've got L1 and L2 hooked up to the same leg of the main? That would still give you 120 on each but not 240 from L1 to L2 like it should be. I'm not familiar with the LG system, but I would think that a comm line would have two wires.

Posted on Jul 14, 2010

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This video demonstrates how to check a battery for proper voltage before replacing it. In the video examples the battery has been removed from the unit, although a battery can be tested while on or off the unit.
Tools Needed: Volt Meter
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I am working with a Dayton 2YU39. The name plates states that it has to be powered by 208 volt system. There's a 3-phase panel and a single-phase panel. The 3-pahse panel L1 to ground is 118 volts. L2 is a...


Hi,
Here's what I think but you will have to check it out...
The fan motor in the 39 heater is a 120V fan there fore it cannot be hooked to the 240 which potentially could have the high (wild) leg as one of the fan legs...
The 240V 36 unit probably has a 240v fan motor....
Now if you were to make sure that the leg that fed the motor was a 120V to ground leg then you will be okay...
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First the foam insulation is not just for looks,you will have some loss of cooling on the unit,the larger cooper line needs to be insulated,the small one does not.The large line is the suction line,the small one the liquid line.
Voltage,168 is low,sounds like a 208 volt unit or 220 volt.running at 168 or 198 ac volts is going to raise the amperage causing the compressor to run hot and work harder and soon burn up,And cause it to trip the breaker or shut itsself down on high heat.Your going to need to get that voltage fixed.I dont know why it needs a stabilizer if the unit was sized correctly it shouldnt need one.
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  • Check the shown capacitor. Lift one leg then connect the test leads of the ohmmeter to the capacitor terminals. Do the same with the test leads in reverse. The pointer should deflect quickly to the right then slowly deflect back to the left on both instances. Otherwise the capacitor is bad and must be replaced with the same specifications.
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