Troubleshooting—— 2. Coffee Extraction Issues

2. Coffee Extraction Issues

• • Causes and checks:
    • Coffee grounds are too fine.
    • Excessive tamping pressure.
    • Water tank is empty: Add water to the tank.
    • Air pump not working: If the pump has been idle for a long time, use the hot water function continuously to unblock it.
  • Solutions: Adjust grind size and tamping pressure; add water; use the hot water function.

• • Causes and checks:
    • Coffee beans/grounds are stale or expired: Use fresh coffee beans/grounds.
    • Coffee grounds are too coarse: Adjust the grinder to a finer setting.
    • Using light-roast coffee beans: Switch to dark-roast beans.
  • Solutions: Replace with fresh coffee beans/grounds; adjust grind size; use dark-roasted coffee beans.

• • Causes and checks:
    • Personal preference: Adjust the coffee volume according to the manual. The default settings are 30-50ml for a single shot and 50-70ml for a double shot.
    • Insufficient coffee grounds (too little coffee): Suitable amounts are approximately 13g for a single shot and 19g for a double shot.
    • Excessive tamping pressure (too little coffee).
  • Solutions:
    • Too much coffee: Adjust the volume using the manual.
    • Too little coffee: Adjust grind size, tamping pressure, and amount of coffee grounds.