What do "fresh air" and "health" on the air conditioner remote control mean? What are their functions?

Fresh air is similar to a ventilator. As for health, after pressing this button, turn off the fan of the indoor unit for a period of time under refrigeration, and the fan of the indoor unit will not stop immediately until the condensed water of the indoor unit is dry. So there will be no condensed water left inside the machine. Due to the high temperature in summer, the condensed water left in the indoor unit will worsen the water quality and pollute the indoor air.