LG Mini Split MS 36 AIR CONDITIONER

Inlouof · 09-16-2011, 09:10 AM

I have a LG Mini Split High Wall MS 36 Ductless Air Conditioner that is dead...about 5 years old..I am getting 220 volts AC into the unit, but can not find the correct drawings or schematic I need to test the DC Voltage to the 2 PCB Boards inside...I found one website that has the schematics but they were awful. Anyone out there that might know the correct voltages coming off the PCB boards so I can trouble shoot the problm??..or where to go for them would be appreciated...I found a reset button and a fuse but that seems fine and did not correct the problem...Lou

cascadehvac · 09-16-2011, 09:41 AM

the dc voltage to and from the indoor/outdoor unit fluctuate. this is comunication between the two units. there is no set number you can look at. yoou can call lg and talk with a tech that can walk you through the process. most likely the compressor is dead tho. does the out door fan come on? if so check and see if you have any amp draw to the compressor.
www.cascadehvac.com

Inlouof · 09-16-2011, 10:46 AM

Thank you for responding...The fans and the compressor are also dead...the 3 split systems in the house are dead...it seems as though the mother board outside is getting no power at all...almost like a fuse is blown...no voltage to the 3 units in the house...seems like a voltage problem, not a fan or compresser problem...there are yellow LEDS on the mother board with no lights on them as well...Lou

AirstarFilters · 09-16-2011, 04:04 PM

R22 ? You may be changing everything as new condenser may not be compatible with old technology

Inlouof · 09-16-2011, 08:04 PM

Not sure what you mean...I have not changed anything on the system yet....there are web sites for parts, but I am looking for some wiring drawings that show voltages...or has anyone worked on an MS 36 split system and had 220 volts coming in but nothing else worked inside the unit ..and again..no light or power on the 3 units inside...lou

AirstarFilters · 09-17-2011, 10:46 AM

Try www.lghvac.com , if no luck contact LG in Alpharetta, GA