31
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Measuring flow rate (2)
Procedure (continued):
7. Connect pressure hose to pressure tester.
8. Position measuring beaker underneath
exit tube of pressure tester.
9. Switch on machine.
10. Press coffee button after heating-up.
11. Open valve fully till water begins to flow.
12. Close valve slowly until 12 bar are indi-
cated.
The manometer must be observed
continuously and the pressure regu-
lated using the valve if necessary.
With increasing temperature the
pressure also increases, if neces-
sary readjust the pressure to 12 bar.
13. Perform measurement for approx. 30 sec.
14. There must be at least 60 - 120 ml water
in the measuring beaker.
Notice:
- With a flow of < 60 ml the pump is defective
or there is a leak in the system.
- Large fluctuations in the pressure gauge
readings (± 4 bar) during measurement are
indicative of a defective pump.
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