30
FunctionTests
ServiceManualC91/D91 enVersion1.0
Protectiveinsulationtest(1)
Performtheprotectiveearthconti
nuitytestatfirst,ifitismandatory.
Whatistheprotectiveinsulationtest
about?
Thistestisnecessary
forclass1and2equipment(with/without
protectiveearth),
afterarepairwheneverthehousingwas
openedandforexampleageneraldisas
semblywasperformed.
General
Legalregulation
Incaseofarepair/modificationofthecoffee
machine,therepaircentreisboundbylawto
protecttheuser/consumerby
restoringtheregularconditionoftheappli
anceand
performingtherespectivetestsaccording
toE N/IEC603351“Safetyofhousehold
andsimilare lectricalappliances”and
nationalregulations(e.g.DINVDE0701).
Description
Theinsulationtest
assuresthatwiringandinsulationofthe
coffeemachinefullfillthenormative
requirementsafterarepair,
ratestheinsulationcapabilityofthecoffee
machine,
isaverydangeroustestbecauseofahigh
testvoltage(500VDC).
Fortheinsulationtest,phaseandneutralwire
areshuntedatthepowerplug.Thenatest
voltageisappliedbetweenphase/neutraland
selectedpartsofthecoffeemachine.
Testequipment
Specialtestequipmentisneededthat
complies
withtheregulationstoperforminsu
lationandwithstandingvoltagetests.Detailed
requirementsandtolerancesmustbeverified
withyourlocalauthoritiesormeasurement
supplierinanycase.
Ideallythetestequipmenthasanational
powersocketfortesting,sothatthecoffee
machinecanpluggedindirectly.Otherwisea
specialshuntisnecessarytoconnectthe
phaseandneutralpinofthecoffeemachine’s
powerplug.
Ask
Nespresso
forrecommenda
tionsabouttestequipment.
Testreport
Forlegalreasonsarepairortestreportshould
bepreparedandfiledwithfollowinginforma
tion
customer(name,address)
typeandserialnumberofcoffeemachine
dateofrepair/test(s)
performedtest(s)/measuringvalue(s),test
points
usedtestequipment
signature
Testsequence
Dangerofelectricalshock/short
circuit!
• Donotpluginthecoffeemachine
duringinsulationtest.
Dangerofelectricalshock!
• Donottouchtipoftestprobes.
• Donottouchmetallicpartsofcoffee
machineduringtest.
•
Readandobservesafetyinstructions
inusermanualoftestequipment.
Continuedonnextpage.