Nespresso EF485/486 Coffeemaker User Manual


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139
F U N C T I O N T E S T S
9.7 NTCtemperaturesensorfunctionality
TheresistanceoftheNTCtemperaturesensormustbewithinadefinedrange,other
wisethetemperatureregulationwillnotworkproperlyandthecoffeemachinewillstay/
gointofailuremode.
AneasywaytocheckthefunctionalityoftheNTCtemperaturesensoristomeasurethe
ohmicresistanceatambienttemperature.Withthismeasurement,mostdefectNTC
temperaturesensorscanbedetected.
Avoidcontamination
ofsensorcontactsur
faceduringhandling.
1) UnplugNTCtemperaturesensorfrom
electroniccontrolboard.
2) RemoveNTCtemperaturesensor
fromthermoblock(refertopage104
andfollowing).
3) Measuretemperatureofsensorbody
(donottoucheithertemperatureor
NTCsensorbyhand).
4) MeasureresistanceofNTCtempera
turesensorbyconnectingamultime
terattheplug.
5) Comparemeasuringvalueswithfol
lowingdiagramortable.
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