1. E01: Water shortage – Indicates that there isn't enough water in the water tank to brew coffee.

2. E02: Water pump malfunction – Indicates that there is a problem with the water pump， which is responsible for pumping water from the tank and into the brewing system.

3. E03: Coffee grounds too fine – Indicates that the coffee grounds used are too fine， which can cause blockages in the brewing system and prevent water from passing through.

4. E04: Coffee grounds too coarse – Indicates that the coffee grounds used are too coarse， which can result in weak coffee.

5. E05: Coffee machine overheating – Indicates that the coffee machine is overheating， which can be caused by a malfunctioning heating element or a clogged water line.

6. E06: Coffee not dispensing – Indicates that the machine is not dispensing coffee， which can be a result of a clogged coffee filter， blockage in the brewing system， or malfunctioning brew group.

7. E07: Grinder malfunction – Indicates that there is a problem with the grinder， which could be due to a blockage or malfunctioning motor.

8. E08: Milk frother not working – Indicates that there is an issue with the milk frothing system.

9. E09: Brew group malfunction – Indicates that there is a problem with the brew group， which could be due to a clogged or malfunctioning solenoid valve， a blocked water line， or a defective motor.

10. E10: Electrical problem – Indicates a problem with the electrical circuitry of the coffee machine， which could be due to a malfunctioning control board or a faulty power cord.