Measuring Flow Rate - Nespresso EF 737 Service Manual

Maintenance

Measuring flow rate

Procedure:
1 Remove ejector.
2 Remove pyramid plate support.
3 Fit pressure gauge.
4 Close jaw.
5 Position measuring beaker underneath.
6 Switch on machine.
7 Open valve fully.
8 Press button "Large cup".
9 Close valve until 12 bar are indicated.
The manometer must be
observed continuously and the
pressure regulated using the valve if
necessary. With increasing temperature
the pressure also increases, if necessary
readjust the pressure to 12 bar.
10 Perform measurement for approx.
30 sec.
11 There must be at least 60 - 120 ml in the
measuring beaker.
1
12 bar
5
60...120 ml
Notice:
With a flow of < 60 ml the pump is
!
defective or there is a leak in the system.
42
4
2
8
3
7
9
10
30 s
Large fluctuations in the pressure gauge
readings (± 4 bar) during measurement
are indicative of a defective pump.