Question about LG LW5200ER Air Conditioner

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AC Repair I have a 1.5 ton window AC. There was icing on the front grill. The mechanic refilled the gas. And now the AC doesnt cool as it used to. What is the temperature of air at outlet which i can measure and ask him to meet the requirement? What is the pressure/ quantity of gas that should be maintained?

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Depending on your indoor and outdoor air temp is, a cooling system will condition the air by 15-20°f. So if it is pulling in 80°f air, it should be supplying 60-65°f. The amount of gas cannot be answered here, without more info. That answer should be on the name plate/tag on the unit, "R410-A = 32oz." Or something like that.

Posted on Oct 22, 2017


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Posted on Jan 02, 2017

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SOURCE: regarding gas pressure

ok lets see how i can help you. If the units low on gas, suspect a refrigerant leak!! 2nd, what refrigerant it's using? I can't tell you operating pressures if you don't know the refrigerant. (usually the label on the indoor unit right side says refrigerant charge and type.) 3rd desired temperature for cooling is about 68-72 F that's about 20-22 Celsius.

id keep it on 21 C

Posted on Apr 23, 2008

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SOURCE: recharge gas

The pressures are based on ambient temperature outdoors and temps indoors. Also, it is based on the seer rating for this unit. You have to use a chart so you can do the calculations. Unless you have this chart, you can't charge they system. I would not recommend doing it yourself. Have a professional do this as it can be very dangerous for the inexperienced.

Posted on Apr 11, 2009

  • 334 Answers

SOURCE: Bon-Air mini split 1.5 ton, suction and discharge

Sorry to sat but the tech has no idea what he is doing. The metering device is in the discharge valve, making that line a low pressure, not high. If the "suction" line is hotthen it is running in heat mode.

Posted on Jun 25, 2009

  • 5 Answers

SOURCE: 1.5T Voltas Vetris window AC. Ice formation

I think the more likely problem is that the unit is slightly short of gas\ refrigerant, which is a common cause of icing up evaporator coils and this sound you describe. First check that the air filter is clean. Another cause could be the defrost sensor is faulty, but I would think not. Some ice isn't actually a bad thing, but quite common as long as it doesn't form over too much of the coil, or get too thick.

Posted on Aug 16, 2009

  • 60 Answers

SOURCE: we have 1 ton window ac and its not cooling properly

the fact that it is not draining could be the problem with it freezing up. you might have to pull it out of the window, pop the cover off and clean the drain pan so it will drain properly. also make sure the unit is level . if it still freezes up once draining properly it is probably low on charge.

Posted on Aug 27, 2009

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My ac is not cooling even when its on high,,,it feels like it is on fan...Help we are having a heatwave....:(

typically that would mean either the compressor is not operating (that wouuld likely be a bad starting capacitor) ... or if the compressor runs ok but still doesnt cool then its probably low on refrigerant .. and that means there is a leak ... a service man would locate the leak, repair then refill with the proper reftigerant (r134a probably or r22 in older equipment) .. he would have to add a service port to allow refilling .. thats like a saddle valve . ... listen for the compressor .. if it just buzzes but doesnt run then suspect the starting capacitor (rounded metalic part about 3 inch) that will be connected to the compressor with 2 or 3 wires .. if the compressor seems to start then suspect low refrigerant .. make sure all the coils are clean and not iced over ..

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Why the word ton used for airconditioner.

hi there..

this what i found for you...

The unit ton is used in refrigeration and air conditioning to measure heat absorption. Prior to the introduction of mechanical refrigeration, cooling was accomplished by delivering ice. Installing one ton of refrigeration replaced the daily delivery of one ton of ice.
  • In the United States, a standard ton of refrigeration = 12,000 BTU/h = 200 BTU/min ≈ 3,517 W. It is approximately the power required to cool 1 short ton of water by 1 °F every 10 minutes; or the power required to melt one short ton (2,000 lb) of ice at 0 °C in 24 hours.
  • A ton is also a unit of energy equal to that power for a period of a day, or 24 h × 12,000 BTU/h = 288,000 BTU ≈ 303.9 megajoules.
  • A less common usage is the power required to cool 1 long ton of water by 1 °F every 10 minutes = 13,440 BTU/h ≈ 3,939 W.
All the Best.

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Feb 24, 2008 | Heating & Cooling

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