Question about LG LSC121PMA Split System Air Conditioner

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LG Split unit turns itself off after a couple of seconds of opera

Have more than one remote. tried resetting remote and turning it on. nothing works. unit keeps shutting down. there's an orange light blinking continuously. unit model is LMNC24LTL0

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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.

Posted on Feb 16, 2009

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In display board of ac there is small on off switch .cut the switch with cutter. problem will be solved.

Posted on Apr 13, 2014

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My LG split air conditioner beeps and turn off by itself. The it beeps flash 2 times the on and off light and shuts down by itself. How to fix it ?


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.

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Lg air con turns itself of


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
OR
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

Feb 11, 2015 | LG LSC121PMA Split System Air Conditioner

1 Answer

Our airconditioner has the code C6 on it. It has cut out and displayed that code. We were instructed to turn it off at the power board and turn it back on, which we did. It went back on again and tried to...


I previously asked you, if the C6 appear on the unit or on the hand held remote. I contacted a friend of mine who is a service technician for the LG Split System units and he advised that it's an error code that can only be solved by a LG trained service tech or LG itself. It may have been caused by a power surge, which may have caused some damage to the circuit board.

Sorry I couldn't be of more help.

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Before buying new one, try with this step. Remove batteries from your remote and reset it after 5 minutes. And also remove DC wires plugged to indoor sensor display, and after 5 minutes re set it again. Now start your unit. Sometimes it will work out. Thanks.

Feb 02, 2011 | LG LSC121PMA Split System Air Conditioner

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First check your circuit breaker or fuse that supplies power to the outside unit. It's probably separate from the inside unit. Then try to turn unit on. If the fan and compressor just make a humming sound then turn it off and check the capacitor if you have a multimeter. You can also look at it and see if the top looks expanded. That's a good sign its bad, but not all bad one's look expanded. Tomorrow I will have access to an LG service manual and can let you know what the code means. Sorry I can't get it sooner. Let me know what you find.

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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). Check for reset or rst button in your remote control and push it to reset and test it in your unit. If wont work means either the receiver board or mean board is defective.You need a qualified tech. for this problem. For the mean time you can use manual button to operate the unit.

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medev,

there is a lot of reason why your LG split unit would not work by remote control.
first likely trouble is the remote itself. it could have drop from a height and broke the remote, or corrosion has set inside the remote if you left an old battery for a long time and it could have broken it.

secondly which is not more likely to happen is the remote receiver in your unit got broke that is why it can not communicate with your remote controller. it could happen if someone has serviced your evaporator and could have disconnected wires to the receiver , or wires were just left not connected.

you can test the remote if you have an identical unit which is working with a working remote. use the working remote to your unit then you can decide.
i hope i was able to help.

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Try sutting off the power to both units. This may reset the unit. Check out the service manual at LG website www.lgusa.com. Go to their support page and put the model number in. Remove and replace the batteries in the remote. If there is a communication error, the inside unit will display 3 flashes. If all else fails, call LG at 1-800-243-0000. Good Luck!

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