CF function
When the inside air filter has too much dust, your air conditioner is unable to draw in a sufficient amount of air. This may be the cause of the issue with the temperature and noise. We recommend cleaning the filter every 2 weeks or when the CF display code appears on the indoor unit display. (The CF display code means filter-cleaning reminder.)
Please check your air conditioner model below and follow the how-to guide to clean the air filter. This will give you cool and fresh air.
dF (Defrost function)
When the Defrost function is on, the df indicator appears on the indoor unit display and steam is produced on the outdoor unit. Then the air conditioner stops running to prevent cold air from coming out of the indoor unit.
Automatic Defrost
When the outdoor temperature is low and the humidity is high, frost may develop on the outdoor heat exchanger, which may decrease heating efficiency. When these conditions are met while Heat mode is on, the air conditioner runs the Defrost function for 5 to 12 minutes to remove frost from the outdoor heat exchanger.
