My mini split turns on but is not cooling.

With out looking at it, I can give you some ideas that could cause these problems. I need to know where the water is coming from? If it is leaking on the inside, this narrows it down some. It sounds to me that the evap. coil is icing up which the unit could be low on freon, you're indoor fan motor may not be running up to speed, a dirty filter or evap. coil. You need to shut the unit off, maybe through the night. Get a latter and remove the cover on the indoor unit. Check and wash the foam filter and look the coil over for excess dirt build up. Leave the cover off for now, and go outside to the outdoor unit. Have someone turn the t-stat to on. Watch and make sure that the outdoor fan stays on and listen very close to see if you can hear the compressor running. It sounds to me that one of the named items I have listed is causing the evap. coil indoors to ice up and blocking the air flow to you're home. Let it run with the cover off and just watch it for a few hours. If it starts to ice up and the filter is removed with cover, and the indoor fan is also blowing air, more than likely, you have a small freon leak which is causing the problem. If I were there, I would know in a few min. what the problem is. As far as the leak, it is the ice melting off and running over and the condesate line may have a partial plug in it. If it is low on freon, you can go outside and put your hand on the larger copper line to see if it is warm. It should be sweating or condesating if it is charged properly. If warm or barely cool, more than likely it needs a charge and leak check.