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Our LG LST243C split system tripped power couple of times but is now running but no cooling at all

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5 Suggested Answers

bobotfel
  • 236 Answers

SOURCE: LG LST243C-2

- Check your air filter at the indoor if clean.
- Check your evaporator fins if clean.
- Check if no icing in your evaporator and outdoor pipes.
- If your air filter and evaporator fins is clean and icing is present then your unit is under charge.
- When your indoor drips check your drain pipe if there are water comes out. If no water drain from your drain pipes then your drainage is restricted.
- Flush your drainage with water using your garden hose to flush out dirts from your drainage.
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Posted on Jan 14, 2008

shastalaker7
  • 1515 Answers

SOURCE: have a reverse cycle split system LG aircon

Hi, dealing with these ductless split systems on a daily basis, I can say you have checked some of the things I would have wanted you to check, which is good on you're part.Blowing Room Temp. air in both heating and cooling indicate that the compressor is not running even though the outdoor condenser fan is on.There are several things that could cause this. You have a compressor run capacitor that starts the compressor, but I am thinking on you're unit, it has a dual capacitor that runs the compressor and fan together. Fan is on, so I will rule this out.These units are notorious for leaking freon as the Liquid line and suction lines are not brazed, they are put together with connectors that tend to leak over time. If it is low enough on Refrigerant gas, the compressor will shut off and stay off on low pressure. This unit has a low pressure switch that has normally closed contacts, that opens and stops the compressor from any damage which in turn, you will have no cooling or heating.Do this for me, turn the unit on in cooling, lower T-stat way down so outdoor unit comes on. Go to the out door unit and where the elect. wiring and lines go into unit you will see to copper lines. The largest of the 2 lines is the low or suction line.Wrap you're hand around it and it should be nice and cold. If it is warm, just touch the smaller line, it should be rather warmer, almost hot.If both lines are of normal temp. you are either out of freon or the compressor isn't running.You can remove panel to get to it and put your hand on it to see if it is on. If the lines were of normal temp. and the compressor is not on, more than likely you have lost the charge.Look it over, the wiring to see if you see anything burned or connections burned off and so on. You can check the 3 wires going into the compressor by turning off the power at breaker and removing the cap covering wires just to make sure these wires are intact. sometimes one will get hot from power and burn off. If you see this problem, it would be something you could fix.If all looks good, go back to the copper lines and being this is a Heat-Pump, you should have 3 fittings where we install our gauges to check and fill systems with freon. Look for one that is on the unit itself and remove the plastic cap.Don't be alarmed if you do as nothing will come out.If you look inside the valve, and you see a Schrader core, you can depress it with a nail or something small, just enough to see if it has a lot of pressure in it.If very little or none, the system is out of freon. You will have to call a tech out to find leak and evacuate and re-charge system.I wanted to give you many things to check so you and I would know what the problem is, a process of elimination. If you have a lot of pressure, then more then likely you have a faulty compressor. If you feel that you would rather not check the electrical or depress the Schrader, I fully understand.You can at least check the temp. of the lines and listen to see if the compressor is running, and if it is with warm lines it is still low on freon.Please keep me informed, and again the long explanation was for you to understand more about you're system operation. Sincerely, and best of luck,
Shastalaker7

Posted on Nov 23, 2009

SOURCE: where is the capacitor located in lg art cool air

This capacitor is usually located where the line voltage goes into the unit. There can be two capacitors or one. This is probably a dual capacitor
and if you follow the compressor wires and the fan
motor wires it will lead to a usually sliver looking
metal container with electrical terminals located on
the top

Posted on Jan 10, 2010

kel1guy2002
  • 3740 Answers

SOURCE: split ac runs for 2 hrs and MCB TRIPS

Hi and welcome to FixYa. I am Kelly

This is a sign of a compressor that has an armature dragging internally or the winding has a short to the chassis inside the compressor. Placing your hand on one with an internal short to the case will definately get your attention. USE a meter! (lesson learned the hard way too many times)

It really is not wise to keep trying to use the unit in this condition.

1. Higher electric bill

2. When compressor finally burns up and contaminates coolant system.... purging and cleaning the coolant system can be as costly as the compressor replacement.

3. There is a remote chance there is a chaffing wire from the outside unit to the inside unit. (Very remote)

A Service Tech will do a running check where he verifies the running amperage of the unit. High amperage = a bad / dragging compressor.

Kelly

Posted on Mar 02, 2010

  • 79 Answers

SOURCE: lg split ac outdoor unit delayed start

sounds like you have a bad coppressor

Posted on Apr 12, 2010

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