20 Most Recent LG LSC121PMA Split System Air Conditioner Questions & Answers

The "CO" indicates cleaning operation and can be switched of via remote button under flap, labelled AUTO CLEAN.

LG LSC121PMA... | Answered on Jul 14, 2020

here are some icon meaning, this may help.


LG LSC121PMA... | Answered on Apr 28, 2020

What is the problem of error code “Lo”

LG LSC121PMA... | Answered on Sep 02, 2019

What is the make / model of your air conditioner. With out that information i cant help you with your ac repair problem.Air Conditioning Delray Beach

LG LSC121PMA... | Answered on Aug 15, 2016

You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset. West Palm Beach Air Conditioning

LG LSC121PMA... | Answered on Aug 15, 2016

Lift the front cover of the air con, on the right hand side there is a button or a hole which has a button inside which you can press which is for manual starting of the air con. If this works, then you will know the remote is faulty, if it still doesn't work, check that the isolator switch for the air con hasn't been turned off. There will be 9Or should be) a switch outside next to the air con outdoor unit to switch power on / off to the air con. If not, there should be switch inside the meter box at the front of the house. Make sure they are switched on.

LG LSC121PMA... | Answered on Apr 11, 2016

Check your remote control using your camera or cellphone camera as your eyes. Point the remote control transmitter to your camera and "on", light should emit in your remote control transmitter (means good remote). Reset the unit by disconnecting the power supply for 10 sec. then "on" again and start the unit. If it wont work you need a qualified tech. to solve the problem.Some of your safety device might be defective.

LG LSC121PMA... | Answered on Mar 04, 2016

Outdoor unit suction sensor fault. Disconnect from PCB and measure resistance. 10 kOhm at 10°C and 4 kOhm at 30°C. If OK replace PCB, if not replace sensor

LG LSC121PMA... | Answered on Feb 09, 2016

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.

LG LSC121PMA... | Answered on Mar 30, 2015

I have hitachi rotary 7 year ild fitted in Out door split unitbut nowafter 1o minutes working it automatically trip.what should we do

LG LSC121PMA... | Answered on Mar 30, 2015

Usually when an AC runs a couple of mins then turn off is due to a couple of things; (is there a blinking light as well?)
1. Gas pressure is too low so AC is cutting off on the coil sensor
2. The Coil Sensor itself is defective

Two sensors are located inside the evaporator with one at the front of the coil (room sensor) and one at the side if the coil inside a copper sleeve (Coil Sensor)

Remove both sensors.using a multimete, turn it to measure resistance in ohms then take the wires of the sensors and touch them with the meter leads. You should get an ohmic reading in kilo-ohms usually between 4k-10k ohms. With the leads connected, rub the sensor between your fingers and see if the value of the resistance change, it should.

If your reading is in ohms 0-999 the sensor is bad.
Note that the value of the sensor should be replaced with the same value or else it would not work i believe LG units are compatible with 8k ohm sensors

LG LSC121PMA... | Answered on Feb 27, 2015

It sounds like a pc board problem, it is easy to change, just take your model number to an agent and ask for indoor pc board replacement, it just plugs out and the new one can be plugged in

LG LSC121PMA... | Answered on Feb 16, 2015

Check that your timer is off on your remote

LG LSC121PMA... | Answered on Feb 12, 2015

C5- Indoor to put door communication problem.

Comms Error, check your wiring, remove external pumps. Split/Multi - check volts from terminal N to 3 = 0 - 65 Vdc, Multi V - 4 Vdc terminals 3 and 4

LG LSC121PMA... | Answered on Dec 31, 2014

NO!!...its not made to operate on that frequency..it will work for a while then you will have component electrical failure..

LG LSC121PMA... | Answered on Sep 20, 2014

i have a similar situation going on this is the second time this is happening the remtoe sensor doesnt work when faced towards the ac .its really sad that i bought this unit just 5 yrs back

LG LSC121PMA... | Answered on Jul 13, 2014

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