P2 Error on LG Portable Air Conditioner
This is specific to the rolling portable A/C from LG. It may apply to other variants as well. The LCD screen flashes P2 and won't allow the fan or A/C to run.
I tried emptying the condensor outside both the top and bottom plugs, it ran for about 10 seconds then flashed P2 again. I tried draining it again, this time carefullly tipping it towards the drain, quite a bit more water came out of the bottom drain plug, and a little more from the top.
This time it worked fine.