Why did my AC compressor blow out?

[Jprps]

So just this morning my AC system purged out the back of the compressor and I have a couple of questions. It's still cold out and I'm not using the AC, (I assume it was cycling on defrost) but what caused the pressure to go that high? High pressure switch? It's a new compressor last summer. Also is the compressor garbage now? Or will it work again if I figure out the pressure issue? My dryer, expansion valves, condenser and thermistor are all new. Worked great last summer.