LG R09AWN-NB10 Owner's Manual page 20

Maintenance and Service
Removal of Filters
Open the front panel as shown.
Then pull the filter tab slightly forward to remove the air filter.
After removing the air filter remove the plasma and Allergy Free Filter by slightly pulling downwards.
Don't touch this plasma filter within 10 seconds after opening the inlet grille, it may cause an electric shock.
20 Air Conditioner
Plasma Filter /
Allergy Filter
Triple Filter