Test Sequence - Nespresso Maestria EF 285 Service Manual

9.10.3 Test sequence

Danger of electrical shock/short circuit!
Do not plug in the coffee machine during insulation test.
Danger of electrical shock!
Do not touch tip of test probes.
Do not touch metallic parts of coffee machine during test.
Read and observe safety instructions in user manual of test equipment.
1) Connect the phase and neutral pin of
the power plug together with a test
adaptor (procured by the repair
centre).
2) Connect the black measuring cable to
the test adaptor (see image).
3) Turn the ON-OFF machine's main
switch on position I (ON).
4) Switch on test equipment and select
an insulation test voltage of 500 V DC.
Same test procedure for Maestria and
Gran Maestria coffee machines:
5) Touch protective ground contact on
power plug with red test probe.
6) Press "measure" button.
7) Read off displayed insulation resist-
ance or test result.
The insulation resistance must be
higher than 300 kOhm
(300,000 Ohm).
F U N C T I O N T E S T S
5.
6.
Maestria / Gran Maestria service manual
A Swiss power plug is
shown here as an
example.
Use a short circuit
plug or special alliga-
tor clips etc. as sub-
stitute for this test adaptor.
Symbolic illustration
of test equipment.
Schematic view with
a Swiss power plug.
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