Nespresso Gran Maestria EF 287, Руководство по обслуживанию

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Maestria / Gran Maestria service manual
135
F U N C T I O N T E S T S
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.
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.
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).
Symbolic illustration
of test equipment.
4) Switch on test equipment and select
an insulation test voltage of 500 V DC.
MEASURE
LOCK/ST
OP
COMP
LIGHT
0Ω ADJ
Schematic view with
a Swiss power plug.
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).
MEASURE
LOCK/ST
OP
COMP
LIGHT
0Ω ADJ
0.215 Ohm
Test passed
6.
5.