If there is the E27 error code, you have a problem in the door lock. Reset your washer by keeping it unplugged for about 5 minutes. Plug it back in and check the screen. If the code is back, the entire door lock unit may need to be replaced.
Also, you can try this:
- Launch a wash cycle. There will be the E27 code and a beeping signal. Let it beep for about 10 minutes. Chances are the machine will reset and get back to normal work.