Reason 1： The drain hose put too high. Water could not be drained out or drained too slowly.
Solution 1： Put the drain hose in a right position according to following picture.
Reason 2： Is the drain hose blocked or pressed?
Solution 2： Clean the foreign material. Release the drain hose.
Reason 3： Is the drain hose extended too long?
Solution 3： The proper length of drain hose is less than 3m.
(The original hose plus the extended hose) . Please adjust the length of drain hose.
If the problem is not solved, please contact the after-sales personnel.