I just came home to my DeLonghi (DEN500P) leaking on my basement floor. The bucket will not fit flush because the clear drainage tube has detached. I use the manual emptying method. I have the manual, but no idea how to re-attach the tube.

If you look at the gray plastic part at the top, there's this gray nub thing. Slide the tube onto that and your problem is solved.

There's a pointy gray nub above the end of the tube. Slide the tube onto that and it should fix the problem.

dehums remove humidity from air inside unit the evaporator sits in drain pan , drain pan has some sort of line or tube witch leeds to the internal collection or bucket thats what you slide out and empty when its full , ther is some sort of sensor or float switch that lets you know wen full make sure unit is draining properly inernaly and full system is working properly

This can be caused by two things: The bucket is not inserted properly or the drain hole or tube inside the unit is clogged and needs to be unclogged.

When removing and reinstalling the bucket, make sure that it fits into the bucket holder "squarely" from top to bottom. When installed properly, the bottom of the bucket should not tilt downward at all.

To unclogged the drain hole or tube: Turn the Master ON/OFF Switch to OFF and unplug the unit.
Using an 18" long plastic Zip Tie or something similar (NO wire coat hangers, though) that is appropriately sized to fit into the drain hole or tube. Carefully insert the Zip Tie and work it in slowly. You will reach a bend in the tubing and you will gingerly, have to work it past this bend. When the Zip Tie either bottoms out or you run out of usable Zip Tie, slowly remove it while rotating (twisting) the Zip Tie. This will dislodge any clogs. Once you near the inserted end of the Zip Tie, be prepared for some water to follow.

Hope this helped you to troubleshoot and solve the problem. Please let me know. Thanks.

The drain tube that drains the water into the bucket is clogged and needs to be cleared.

To do this, you will need at least an 18" long plastic Zip Tie or something similar. (But, NO wire coat hangers) that will fit into the drain tube or hole. Carefully work the Zip Tie into the hole or tube and gently push it forward. You will reach a bend in the tubing, but you will have to gingerly work past this bend. Once the Zip Tie bottoms out or you run out of Zip Tie. slowly pull it back out while rotating it. This will help breakup the clog. Once you start reaching the end of the inserted Zip Tie, be prepared for some water to follow.

The above procedure should solve the problem. Please let me know. Thanks.

Sounds as if the drain tube from the dehumidifier to the collection bucket may be clogged. Turn the unit of, unplug it and remove the bucket. With a flash light, look up into the rear of the cabinet where the bucket was. You should see a drain hole or short section of tubing. If you can see a clog, carefully remove it. If you can't see one. it may be further up the tube. Use some type of wire that is flexible, but yet firm enough to run up through the tubing or hole. Very very careful when you do this, as you don't want to puncture or damage anything.

The other option, if you have an air compressor is try blowing the clog back through the system, using fairly low pressure.

If all else fails, contact LG Customer Service (800) 243-0000

If the room temperature is close to 60, the coils may be frozen (completely encased in ice). If this is the case, move it where the water can drain off - about 1 gallon which may NOT run into the drain bucket.
I out mine over the floor drain.
Turn off and it will defrost over night.
Only specially made dehumidifiers work below a room temp of 60 degrees (the temp of a basement in winter).
Does it need to be running? A digital humidity sensor from Radio Shack is cheap and may tell you the humidity is OK - only 50% or less.

I have the delonghi DEN500P and the unit runs but does not condense any moisture? The appropriate buttons have been set to bring the unit humidity setting well below humidity in room

I think that I am having the same problem, but I'm not sure that this tube needs to be plugging into anything. However, my humidifier seems to be draining out of this tube rather than from the tray into the bucket.

Mine did this last year. I took the housing off of the left side and found a clear plastic tube had popped off the fitting, I put it back on and it worked fine. The tube was toward the lower front of the unit.