Feature : E4
Reason 1： The water tap opened, or is there water supply failure.
Solution 1： Open the water tap. Open and close the top lid once.
Reason 2： The water inlet valve blocked..
Solution 2： Clean the water inlet valve then open and close the top lid once.
Reason 3： The water pressure is too low.
Solution 3： Use after the water pressure is normal.
Still having problems, Please call the Service engineer.