I have a LG LMN120HE split system A/C Unit. It keeps going into Sleep mode. I did what the manual says to do to stop Sleep mode. But this didn't work. Help!!!!

Hi,

Please record the amount of time that it takes until your device goes into sleep mode and set a timer for 5 minutes less than that time everytime you begin to use the lg device. At the points the timer/alarm goes off, you can simply lower/increase the volume and the lg's internal sleep timer should be reset.

Thank you.

Question edited for clarity.

Called 'Sleep Mode', it saves your battery and screen.

To turn off sleep mode on a Mac, go to System Preferences > Energy Saver. Then tick the box next to Prevent computer from sleeping automatically when the display is off and drag the Turn display off after slider to Never.
Dec 24, 2021

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Is there power going to it?

Split = Outdoor unit fan problem. Check Outdoor fan motor is plugged in, Electrically & Mechanically sound, if not replace motor, otherwise replace PCB. Multi V
= indoor PCB failure. Replace PCB.

Let me informed again if problem persists,.

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

I have same problem like yours to my newly installed Fujitsu multi-split system (the first time use since system installed 1 week ago). I rang the electrician who did the installation; he said it must be the units themselves nothing to do with electricity.

Okay, then I rang Fujitsu and their local service agent. They suggested me to switch off C/B for an hour to reset the units. I followed the instruction but the indoor units still did not respond to remote control...

It simply looks like no power supply to indoor units (they are hard-wired to the outdoor unit). So I used a multi-meter to test the power terminals of indoor units (Danger! If you have no idea about this, don't even try! ): it seemed no power supply even C/B is on. I turned to the isolator which next to the outdoor unit. The isolator was making arcing noise when I switched it on and off. The indoor units suddenly turned on for few minutes then died again.

So I figured out the problem is that crooked isolator. I called the unhappy electrician to replace the isolator. End story....

I hope my experience will help you a little bit.

lg air cond.multi split led lamp blink power 1 times,good sleep 2 times

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.

Hello Hamid,
The unit is designed to run the indoor fanmotors continuously when in cooling mode on both indoor units (evaporators). The reason is that this circulates the air and the temperature thermistor or sensor is able to sense return air temperature and in turn start or stop the outdoor unit and compressor as required according to the setpoint temperature. The reason for either unit not reaching setpoint temperature can be a couple of reasons. A) Incorrect design - the unit may be too small for the application. You can calculate this roughly at 650BTU per square meter of room in a relatively warm ambient climate. Or secondly B) The outdoor unit has leaked and is short of refrigerant. You can check this when the outdoor unit is running by feeling the thicker copper tube on the right hand side of the unit. This should be cool to cold. If no temperature difference is felt, it is short of refrigerant. Hope this helps you. Goodbye

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!