Cleaning Process; Steam Boiler - Nespresso Momento 120 Service Manual

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Troubleshooting

8.5 Cleaning Process

Cleaning Tablet Not Detected
• Cleaning tablet missing → Insert cleaning tablet into cleaning tank.
• Cleaning tablet inserted but not detected → move cleaning tank until reed-switch
makes contact.
• Check if the magnet lever is inserted correctly in the cleaning tank cover.
• Check the connection and position of the reed sensor.
Only Stream in Outlet, Drip Tray or Fridge
• Check the performance of the milk pump in the diagnostic tool V2 (not yet
available).
• Check if all tubes are connected correctly.
• Check that the milk suction tube is not kinked.
• Check if the water tank is filled.

8.6 Steam Boiler

Milk Module Has an overpressure
• Pressure sensor not working properly, check its function in diagnostic tool V1.
• Overpressure valve opens too early.
Milk Module Does Not Heat Up
• Reboot the machine.
• Check the electric connection of the boiler.
• Check the electric resistance of the steam boiler. If you find an open circuit,
replace the steam boiler.
• Check the electric connection of the control board.
• Pressure sensor or boiler temperature sensor not connected or not operating.
Check its function in the diagnostic tool V1.
Boiler Temperature Too High
• Check the function of the boiler temperature sensor in the diagnostic tool V1.
• Check the function of the boiler pressure sensor in the diagnostic tool V1.
• Check the connectors of the control board.
Boiler Refilling Fails
• Check the connector of the water level probe of the boiler.
• Check the ground connector of the milk module.
• Check the connectors of the control board.
Momento 120 Service Manual Version 1.4 EN