Coway CHP-03AR - Manual (Page 26)

FILTER REPLACEMENT METHOD
2 . remove the gutter, and separate the front cover by pressing down, and
unplug and separate all the cables connected completely .
(If the water in the storage tank remains, close the cold water/room water
changeover faucet using the stopper inside of the upper cover
and separate the front cover .)
1 . Close the main water supply valve after unplugging the power cord, and
drain the water inside of the water filtration device (See p .21) .
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