Troubleshooting; Preventive Maintenance Plan Coffee Module; Components To Be Replaced Periodically; Preventive Maintenance Milk Module - Nespresso Momento 120 Service Manual

Before any
intervention to the
machine, clean and
sanitize your hands
and tools. After the
intervention started,
sanitize your hands and
tools frequently.
52

Troubleshooting

8 T R O U B L E S H O O T I N G
This chapter gives useful hints and information for fault finding. It is not intended as a
complete list of possible errors and malfunctions.
For troubleshooting information regarding the coffee module, see the Momento
100/200 service manual.

8.1 Preventive Maintenance Plan Coffee Module

8.1.1 Components to be replaced periodically

The following are the default lifespans for periodically replaced components:
• Pump: 25'000 cycles → p. 128
• Brewing Unit: 48'000 cycles → p. 132
• Hot water valves: 25'000 cycles → p. 122
• Coffee valves: 25'000 cycles → p. 122
• Drain valve: 48'000 cycles → p. 122
Depending on the customer there might have been different lifespans
programmed → p. 39.

8.2 Preventive Maintenance Milk Module

Preventive maintenance on the milk module has to performed after 9000 cycles or
every 365 days.

8.2.1 Components to be replaced

• Replace the water coupling check valve → p. 156
• Replace the plunger and gasket of the steam valve → p. 153
Metal component support
• Replace the complete steam pressure regulator → p. 188
• Replace the complete steam heating chamber → p. 196
• Replace the membranes (→ p. 143) of the following valves:
- Outlet valve → p. 144
- Source valve 3/2 inside the RF-Box → p. 179 no. (4)
- Suction nozzle valve above the pressure sensor → p. 186 no. (4)
- Cleaning valve 3/2 behind the steam heating chamber → p. 196 no. (3)
Plastic component support
• Replace the complete steam pressure regulator → p. 166
• Replace the complete steam heating chamber → p. 170
• Replace the membranes (→ p. 143) of the following valves:
- Outlet valve → p. 144
- Source valve 3/2 inside the RF-Box → p. 157 no. (4)
- Suction nozzle valve above the pressure sensor → p. 164 no. (4)
- Cleaning valve 3/2 behind the steam heating chamber → p. 170 no. (3)
Momento 120 Service Manual Version 1.4 EN