Soft/Dry Mode is used to de-humidify the room space. The unit does this by air conditioning for a minimum amount of time, which allows collection of moisture from the air without changing the temperature noticeably.
Pre-coated fins does not allow formation of droplets on the fins surface thereby allowing better heat transfer and increased efficiency.
Filter Clean Indicator
Filter Reset on your window air conditioner indicates that your filter needs maintenance i.e. cleaning or replacement.
The sensors in the outdoor unit detect ice has started forming on the heat exchanger and the system starts trying to remove this ice before it builds up.