Clean the lint filter in the proper way referring to the following instructions. Failure to do so, the lint that is accumulated on the heat exchanger may not be cleaned properly.
Unload the all of the laundries from the appliance before pull out the lint filter.
After cleaning the lint filter insert them in a place. If the lint filter is not in the appliance, you can not operate the appliance.

Inner Filter
Always clean the inner filter before and after use.
Outer Filter
Clean the outer filter after drying 10 times or when the lint is accumulated into the outer filter.
Pull out the inner filter from the outer filter and then open the inner filter.
Open the filter by unfolding it in the direction of the arrow.

Clean a large cluster of lint first, then clean the residual lint using vacuum cleaner or washing under running water.

Dry the filter completely if the filter is moist. Failure to do so, odour may occur in the appliance.
After drying the inner filter completely, close the filter by pushing down its center.
Ensure the left and right side of the inner filter is closed properly.
Insert the inner filter into the outer filter.
Remove the dust or lint around the filter inlet.

When the lint drops into the filter inlet, it may cause degradation of drying performance and increase in drying time.
Pull out the outer filter.
Remove the inner filter.
Open the outer filter by unfolding in the direction of the arrow grasping the top edge of the outer filter.

Clean the residual lint using vacuum cleaner or washing under running water.

Dry the filter completely if the filter is moist. Failure to do so, odour may occur in the appliance.
Close the outer filter while pushing the side a of the filter.

Ensure the side of the filter is closed properly. Failure to do so, any lint accumulated on the filter may get into the appliance and may cause degradation of the drying performance.

Close them, and reinsert the both lint filters.

Do not load or remove any clothes when the lint filter is not in a place. The clothes can drop into the filter inlet and it may cause the appliance to malfunction.