Nespresso Citiz & Co EF 488 - Manual (Page 144)

Citiz service manual 144
F U N C T I O N T E S T S
9.9 Protective insulation test
9.9.1 What coffee machines have to be tested and when?
This test is necessary
­ for class 1 and 2 equipment (with/without protective earth)
­ after a repair whenever a general disassembly of the platform and/or core unit was
performed.
9.9.2 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 appliance 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 require­
ments 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 insula­
tion and withstanding voltage tests. Detailed requirements and tolerances must be veri­
fied 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.
Test report
For legal reasons a repair or test report should be prepared and filed with following infor­
mation
­ 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
Ask Nespresso for
recommendations
about test equipment.