A9
Lavazza User Interface or Keypad Communication Error

Machine shows A9 and does not respond to brew commands; buttons may be unresponsive.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Loose ribbon cable between keypad and main board, Moisture ingress into control panel, Failed touch sensor PCB, Firmware communication fault

How to Fix / Troubleshooting

Safety first: Unplug the machine before accessing the control panel.

Step 1 – Power cycle

  • Unplug the machine for 5–10 minutes.
  • Plug back in and test the buttons.

Step 2 – Dry out moisture

  • If the machine was recently cleaned or exposed to steam, allow it to dry for several hours in a warm, dry room.
  • Do not use a hair dryer or direct heat on the control panel.

Step 3 – Inspect keypad connections (advanced)

  • Unplug and remove the top/front cover to access the control panel.
  • Locate the ribbon cable or wiring harness connecting the keypad/touch panel to the main board.
  • Disconnect and reconnect the cable to ensure a solid connection.
  • Inspect for corrosion or damage on connectors.

Step 4 – Replace faulty UI board (for technicians)

  • If only some buttons fail consistently, the keypad or touch PCB may be defective.
  • Replace the user interface board with the correct Lavazza part.

When to seek service

  • If A9 persists and no loose connections are found, the main control board may have a communication fault and should be serviced professionally.
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Repair Difficulty

Hard 4/5

Required Part

User Interface PCB
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