My LG air conditioner is starting then stopping. The power LED goes first green, then after 3 to 5s this LED blinks green. After 7 blinking it turns off and the sleep mode LED starts to blink 4 to 6 times. Then it stops and the power green LED blings 7 times and tuns off. The sleep mode LED starts to blink again... Can you tell me how to solve the issue? Thank you and best regards.