As opposed to cooling operation, heating operation generates the cold wind from the outdoor unit and the hot
wind from the indoor unit.
During heating, moisture in the air adheres to the surface of the evaporator in the outdoor unit that has
become cold, causing frost. To prevent degradation of the heating performance due to frosts on the indoor
unit, defrosting operation will start.
During defrosting operation, as melted frost drops to the bottom, vapor is generated and it might look like
smoke.
This is due to melting of frost and it is not a problem with the air conditioner.
What is defrosting?
During the process of frost melting, steam may be generated or water may drip from the outdoor unit.
At this time, the indoor unit stops with the blade open to prevent cold air from blowing out.
This guide was created for all models, so the images or content may be different from your product.

