4 flashes and beeping

Had the same problem.i cut the hose pipe shorter that goes into the outlet pipe.good luck.it solved the problem

4 flashes indicates a drain failure. Could be obstruction in drain system-first check drainhose for kinks, check where drain hose attaches to wastepipe spigot for blockage. If OK blockage may be in pump- disconnect from power, remove bottom panels to access under machine. Drain pump located front left- remove plug from pump, then there is a plastic tag on top of pump you must push down, then drain pump will turn and come off (it comes off easily if tag pressed correctly, so don't force it!!)
If pump OK, fault will be with water indicator switch-sometimes get full of muck. Open dishwasher door, remove filters and clean out any water from base. Right in the bottom right hand side of sump you will see a round black grill- this is water level indicator switch. If it looks blocked up, advise replacing (you can try cleaning, but replacing is best). To replace, access from under machine-again, this switch turns and pulls out, but can be quite difficult due to it being located behind the heating tube.
So, check hoses and pump, then press and hold start button for 3 seconds- this clears fault and resets machine. Try another cycle-if OK, problem solved. Recommend expert assistence to replace water indicator switch.