Function Tests
Protective insulation test (1)
Perform the protective earth conti
nuity test at first, if it is mandatory.
What is the protective insulation test
about?
This test is necessary
for class 1 and 2 equipment (with/without
protective earth),
after a repair whenever the housing was
opened and for example a general disas
sembly was performed.
General
Legal regulation
In case of a repair/modification of the coffee
machine, the repair centre is bound by law to
protect the user/consumer by
restoring the regular condition of the appli
ance and
performing the respective tests according
to EN/IEC 603351 "Safety of household
and similar electrical appliances" and
national regulations (e.g. DIN VDE 0701).
Description
The insulation test
assures that wiring and insulation of the
coffee machine fullfill the normative
Service Manual C91 / D91
requirements after a repair,
rates the insulation capability of the coffee
machine,
is a very dangerous test because of a high
test voltage (500 V DC).
For the insulation test, phase and neutral wire
are shunted at the power plug. Then a test
voltage is applied between phase/neutral and
selected parts of the coffee machine.
Test equipment
Special test equipment is needed that
complies with the regulations to perform insu
lation and withstanding voltage tests. Detailed
requirements and tolerances must be verified
with your local authorities or measurement
supplier in any case.
Ideally the test equipment has a national
power socket for testing, so that the coffee
machine can plugged in directly. Otherwise a
special shunt is necessary to connect the
phase and neutral pin of the coffee machine's
power plug.
Nespresso
Ask
for recommenda
tions about test equipment.
30
Test report
For legal reasons a repair or test report should
be prepared and filed with following informa
tion
customer (name, address)
type and serial number of coffee machine
date of repair/test(s)
performed test(s)/measuring value(s), test
points
used test equipment
signature
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.
Continued on next page.
Version 1.0
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