LG S4 Owner's Manual page 28

Introduction
Replacement of purifying filter (Optional)
Recomended use period : About 2 years
1. Remove front panel and air filters.
2. Remove air purifying filters.
3. Insert new air purifying filters.
4. Reinsert air filters and close front panel.
Outdoor Unit
The heat exchanger coils and panel vents of the outdoor unit should be checked regularly.
If clogged with dirt or soot, the heat exchanger
and panel vents may be professionally steam cleaned.
NOTICE
Dirty or clogged coils will reduce the
operating efficiency of the system and
cause higher operating costs.
(Side)
Air intake
vents
Air outlet
vents
28 Room Air Conditioner
(Rear)
Piping
Drain Hose
Air filter
TRIPLE
DEODORIZING
Filter
2
(Side)
Air intake
vents
Air outlet
vents
(Side)
Air intake
vents
Air outlet
vents
3
(Rear)
Piping
Drain Hose
(Rear)
Piping
Drain Hose