If the split air conditioner is not cold, it means there is a leak of freon, this can be indicated by the presence of snow on the top of the evaporator and the installation pipe with a size of 1/4 that connects to the outdoor unit. Here are the steps you can do:
1. Check the remote control, is the position of operation mode cool? if it’s not in a cool position, move it in a cool position.
2. Check the remote control, is the temperature setting too low? if it’s too low, increase it at a moderate temperature.
3. Check the outdoor unit, can you get the power supply from the indoor unit? You can see whether the fan of the outdoor motor unit rotates or not? If it does not turn, it means that it has not received electricity from the indoor unit.
4. Removing the snow