Replacement of Air Purifying FilterMaintenance221.Open the lnlet Grille2.Detach the standard air filter3.Attach Air Purifying Filter4.Attach the standard air filter(Necessary installation)5.Close the Inlet GrilleClose the Grille surelySlide the knob slightly upward to release thefilter, then withdraw it.Put air purifying filter appliances into theright and left filter frames. Detach old Air Purifying FilterNOTE:The photocatalyst air purifying filter and the bacteria-killing medium air purifying filterwill be used based on real situation.The photocatalyst air purifying filter will be solarized in fixed time. In normal family,it will be solarized every 6 months.Prop up the inlet grille by using a small device namedgrille-support which located in the right side of the ind-oor unit.ATTENTION:The white side of the photocatalyst air purifying filter face outside,and the black side face the unit.The green side of the bacteria-killing medium air purifying filter face outside,and the white side face the unit.Please keep the bacteria-killing medium air purifying filter in the cool and dry conditionsavoid long time directly sunshine when you stop using it,or its ability of sterilization willbe reduced.