What is the function of indoor?
The indoor unit’s job is to cool the air in the room by passing it through the cooling coil. You need to remember that the indoor unit does not bring outside air in or outside air out.
The main parts of the indoor unit are the evaporator, blower, fan circuit, etc.
What is the function of outdoor?
The outdoor unit’s job is to cool the hot, gaseous indoor gas in the service pipe and turn it into a liquid.
The main parts of the outdoor unit are the compressor, air conditioner, operator, accumulator, fan motor.