Nespresso EF487/488 Coffeemaker User Manual


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133
F U N C T I O N T E S T S
9.4 Pressureandleakagechecks
Checkthefollowingpartsofthecoffeemachineforleakages:
• Compactbrewingunit
• Hoseconnections
• Thermoblock
• Pump
• Selfprimingdevice
8) Switchoncoffeemachine.
9) Afterheatingup,pressthe"smallcup"
button.
10)Openthevalveuntilwaterbeginsto
flow.
11)Closethevalveuntilthepressure
gaugeindicates12bar.
Constantlymonitorthepressure
gaugeandifrequiredreadjustthe
valve.Asthetemperature
increases,sodoesthepressure,
readjustthepressureto12bar
whenrequired.
12)Carryoutmeasurementforapprox.
30 sec.
13)Controlmeasuringcup:atleast60
120 mlofwatermustbeinthemeasur
ingcup.
14)Openthevalveandletwaterflowout
ofthepressuretester.
Notices:
• Should<60mlleakout,thenthepump
isdefectiveorthereisaleakinthe
watersystem.
• Largedeviationsinindicatedpressure
whilemeasuring(±4bar)meansthat
thepumpisdefective.
Dangerousmainsvoltageinsidethecoffeemachine!
Donottouchanypartsundervoltagewhilecheckingforleakages!
Dangeroushotpartsunderpressureinsidethecoffeemachine!
Donottouchanyhot/pressurizedpartswhilecheckingforleakages!
Alwayswearprotectivegoggles.
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