Nespresso EF 473 Checking for leaks and pump pressure, Preparation unplug machine from mains

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Repair

Checking for leaks and pump pressure (1)

The following components are checked for leaks:

-Compact brewing unit

-Connections

-Thermoblock

-Pump

Preparation (unplug machine from mains):

1.Remove right side panel (pump is visible).

2.Insert pressure plug in capsule inlet.

3.Press down closing handle lightly till pressure plug fits in capsule cage.

4.Pull off holding device. The pressure plug clamps itself to the capsule cage.

5.Position pot underneath exit tube of pressure plug.

6.Fill water tank.

7.Connect mains cable.

￿Dangerous voltage inside coffee machine! - Do not touch any live part while performing checks.

Hot, pressurized parts inside coffee machine! - Do not touch any hot part while performing checks. Wear safety glasses during inspection.

Continued on next page.

Service Manual EF 473 / EF 474

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Version 1.0 en

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Contents Essenza FS Contents Preface Overview Main ComponentsSerial number codification Overview of rating platesWater circuit Technical data Do not insert a capsule yet OperationPreparation Fill water system Procedure to fill water systemMaking coffee Programming Reset to factory settings Empty water system Operating status of coffee buttons Operating modes Left Coffee buttons LED signals RightCoffee machine status Checking the machine on receipt TroubleshootingFurther details in order to take decision Tool General disassemblyRepair Tools Replacing thermoblock and NTCProcedure for On/Off switch Replacing flow meter and On/Off switchProcedure for flow meter Replacing pump Replacing electronic control board with button prints Replacing compact brewing unit CBU Pump Pump On/Off switch Repair Descaling Carefully read safety instructions on decalcifier packageDescaling Sec RinsingMeasuring flow rate Preparation unplug machine from mains Checking for leaks and pump pressureSwitch off machine Open valve to empty pressure gauge Coffee temperature should be approx C ± 3 C 187 F ± 5.4 F Measuring coffee temperatureProcedure machine is switched off Daily care and final cleaningSpare Parts Repair accessoriesSpare parts EF Electronic set 230V EF Coffee outlet & front ring EF 471 package 29 39154 Coffee buttonEF 30 43061 Espresso button EF 26392 Version 1.0 en