EVERSTAR AC UNIT

Either clogged or not level. Vacuum tube, possibly clean the pan, make sure it's level.

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Have you tried to load from this site.
http://homeappliance.manualsonline.com/support/everstar/air-conditioner/i-lost-the-manual-2346352#comments

This means that the internal bucket is full and needs to be emptied.

check sensor

The P1 code means the lower water bowl is full.
Put a pan under it an pull the lower plug (some 10" below the upper drain plug that I hope you have a hose attached to.

"The black plate with floater in the bucket" is what signals that the bucket is full of water. So if it isn't in the right place then you will get "P1" (Problem 1 which means bucket is full). The "black plate" needs to flop down inside the bucket for it to register as empty. When the bucket fills the floater makes the plate go to the top and it shuts off the unit.

Set it so it doesn't have to work as hard (i.e. higher temp) and it will generate less water.

probably, the p1 signals that the water pan is either full or not sitting properly. There is a small lever that it pushes when the tray is pushed in. It is a switch that might have pushed out of its housing. Mine had and I had to dissasemble the unit to get the switch back in place, then it worked fine. Good luck. Dean