Question about LG LSC121PMA Split System Air Conditioner

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My Lg split AC shows "Lo" in place of temperature. The fan symbol and compressor symbol is blinking. In LG web site the problem described as 'system is in testing mode' and no problem with the Machine. But machine is not working. Kindly let me know how to fix it.

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 400 Answers

SOURCE: WATER LEAKING FROM MY SPLIT TYPE LG AIRCON

1. Do not set the aircon too low temperature in overcast weather, this will cause ice ups and water dripping. Optimal comfort zone temperature is 24c.
2. You need to open the grill cover on the front of the aircon which unclips either end left and right with a finger pressure. You will find two filters which can slide out and should be cleaned. First tap them together to remove dust, then you can wash them with mild soap and cold water.
3. There is the third possibility that an insect has made a nest in the drainpipe. You should look on the outside of the building and locate a plastic drainpipe. You can either blow into this pipe with your mouth or get a blower. This will unblock any restriction in the drainpipe.
Goodluck and ratemeplease.

Posted on Mar 19, 2009

  • 1 Answer

SOURCE: error ch 5

check all wiring and connections - ch 5 is a communication error between the indoor unit and the outdoor unit......

Posted on Dec 16, 2007

bobotfel
  • 236 Answers

SOURCE: air conditioner remote

here are some icon meaning, this may help.

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Posted on Apr 28, 2008

  • 30 Answers

SOURCE: lg split system ch 05

Solution # 1, Check Condensor Fan Motor Capacitor 4uf or MFD
# 2, Check Motor Windings
# 3, Check Relay OR Defination Contactor
# 4, Check Connection Terminals

hope will help u 2 solve this

GOOD LUCK

Posted on Feb 16, 2009

  • 400 Answers

SOURCE: Thermastat on LG Split system

The star with a face is sleep mode, each time you press it you will see a 1 then 2 then 3 up to 7 appear in the lower right corner of the screen. This means that the unit will operate for 1 or 2 or 3 hours then switch off. The house with key if pressed will give you the actual room temperature assuming the remote control is in the same room. It will return to setpoint temperature in a couple of seconds. The triangle with face is termed "Chaos mode" The unit will stay on a preset temperature probably 18c but the airflow will vary and the louver will go up and down irratically or randomly, as it tries to immitate a natural breeze. The fan only button will put the unit into fan mode (no compressor driven cooling), the fan icon with circle around is for fan speed which goes up each time it is pressed. Hope this helps.

Posted on Mar 05, 2009

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Thermastat on LG Split system


The star with a face is sleep mode, each time you press it you will see a 1 then 2 then 3 up to 7 appear in the lower right corner of the screen. This means that the unit will operate for 1 or 2 or 3 hours then switch off. The house with key if pressed will give you the actual room temperature assuming the remote control is in the same room. It will return to setpoint temperature in a couple of seconds. The triangle with face is termed "Chaos mode" The unit will stay on a preset temperature probably 18c but the airflow will vary and the louver will go up and down irratically or randomly, as it tries to immitate a natural breeze. The fan only button will put the unit into fan mode (no compressor driven cooling), the fan icon with circle around is for fan speed which goes up each time it is pressed. Hope this helps.

Jan 21, 2009 | LG LSC121PMA Split System Air Conditioner

1 Answer

Thank you. there are some other signs i don't know about.


The black triangle means AUTO, means the fan speed adjust by itself from high-mid-low speed depending in room temperature but the unit is cooling for this function the same COOL mode. Plasma is in the remote control but it never mention in the manual.
If the unit dont cool check your temperature setting and mode setting it should be in cool mode and temperature setting should be 18C. But if still don't cool check some error code like blinking light at the indoor panel check how many blink appears to get the correct error code.. If the light is blinking 3 times it means that the room air or coil sensor is defective.

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Apr 28, 2008 | LG LSC121PMA Split System Air Conditioner

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