What do the error codes E0, E1, E2, E3, and E4 mean on the Beko Bp109c?

E0 means the room temperature sensor has failed, E1 means the condenser temperature sensor has failed, E2 means the water tank is full during cooling, E3 means the evaporator temperature sensor has failed, and E4 means the water tank is full during heating. For E2, you should remove the rubber stopper and empty the water; for E4, simply empty the water tank. Sensor failures (E0, E1, E3) require replacement of the relevant sensor, though the unit can still operate without replacing the room temperature sensor (E0). (Page 51)