[. . . ] In this process it absorb all the dust from the air and releases clean and fresh air. [. . . ] In this process it absorb all the dust from the air and releases clean and fresh air. Now this result in accumulation of dust in filter and it requires to be cleaned after a particular interval of time else it will get choked. 3 The C h indicator appears after every 336 hours of working time of the fan motor. To rem ove this indicator reset the indicator using step2. f 54 Good Sleep Front grill Air filter Pull out the front grill Front grill Grille groove Body guide Goop d Slee Good Sleep If "Ch" is displayed then pl refer page. 15 Model No. AWT12Z** AWT18Z** AWT19Z** AW24L** AWT18W** AWT19W** AW24W** Power S upply 230V~, 50Hz Net Dim. (mm) W560XH370XD550 W620XH425XD645 W620XH425XD645 W620XH425XD645 W620XH425XD645 W620XH425XD645 W620XH425XD645 Note : All specifications are as per rated condition, i. e. Current and power vary as the outdoor temperature vary. In the case the lock in the front panel gets broken, apply the screw in the hole provided on the front panel. Contact LG WORLD WIDE If you have any comments or questions regarding a Samsung products, contact LG customer care center : 6th floor, IFCI Tower, Nehru Place, New Delhi-110019 Tel . : 3030 8282, 1800 110011 Web Site : www. samsung. com/in Address C O Samsung Electronics Co. [. . . ] Current and power vary as the outdoor temperature vary. In the case the lock in the front panel gets broken, apply the screw in the hole provided on the front panel. Contact LG WORLD WIDE If you have any comments or questions regarding a Samsung products, contact LG customer care center : 6th floor, IFCI Tower, Nehru Place, New Delhi-110019 Tel . [. . . ]