LMN096HVT This is a mini split with 4 air handlers. One of them flashes the Cooling light 6 times when turned on, but does nothing else. The other three units function normally.

SOURCE: LG split system air conditionsr

3 flases indicates a communication error. Have a technician check wiring and connections.

SOURCE: lg split system air conditioner

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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SOURCE: my mini split does not run

Check that you are on the correct mode setting. Open the remote and press the mode button (the one with about four little icons, star, teardrop, triangle and sun) until you get to the mode you require. If cooling required, select the star or crystal, if heating required select the sun (circle with little lines)

SOURCE: air con indoor unit is flashing 6 times out door is off

Please specify the make and model of your unit.
If this is a LG inverter model.
The six flashes of the indoor unit light indicates a CH 06 alarm.
This alarm state indicates that the indoor unit pipe temperature sensor has measured a temperature out of range or the unit is protecting itself from this low temp state. Indoor unit coil temperature to low. Should it have reached a temperature of -5°C for longer that 30sec it will switch the machine off.

It could indicate that the unit refrigerant charge is too low or the sensor has gone out of calibration.

It should measure 5kΩ @ 25°C

SOURCE: LG Ductless Mini Split System LAN125hv: Heat pump doesn't run.

CA: Compressor Discharge Sensor Fault

Contact a qualified service technician and have them replace this sensor.