Hisense 3 Series User's Operation Manual page 15

3 Put a flat container under filter door and then drain with emergency drain pipe
(see [draining residual water] for specific operation methods). Then, loosen
filter anticlockwise and completely unscrew and remove the filter.
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5
6
7
Check the supply hose regularly for brittleness and cracks and replace it if
necessary using a new hose of the same type(available from After-Sales Service
or specialist dealer).
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