The steps are as follows
1 Check the remote control to make sure you set it correctly
2 Make sure the outdoor and indoor unit is clean
3 Check the capster, the outdoor unit if it has leakage or swelling, it is damaged, and to make sure more, examine it through the multimeter
4 If the capster is excellent, turn on the air conditioner and note the outdoor unit if it works excellently (compressor works sound), here check the freon
5: If it does not work or the compressor does not take off, check the so-called external relais from the pressure on it. If you press it and it works, the defect is from it, and if you press it and the air conditioner does not work, the defect is from the compressor
6 Unscrew the compressor wires and check with the multimeter by connecting the compressor to one end of the compressor and the other end to another part
Thank you