defrost water from inside, will normally drain into the plastic trough on top of the compressor, heat from the compressor will normally evaporate that water, Pipes from the compressor should not normally ice up, But could with a lot of moisture, check top of compressor, it should be fairly warm/hot, the plastic trough needs to be sat down on the top of it, The pipe from inside, needs to go into the trough. If it has filled up completely with water, you may need to empty it, It will take more heat to evaporate it if full. should only ever get a bit in the bottom of the trough. See how that goes, If still keeps filling, and pipe still iced up, you have a problem.
SD, August 2012