Nespresso EF 474, EF 473 manual Water circuit

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Main Components

Water circuit

1)Water tank

2)Water tank valve and connector

3)Flow meter

4)Pump

5)Thermoblock

6)Compact brewing unit (CBU)

7)Coffee outlet

Service Manual EF 473 / EF 474

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Contents Essenza FS Contents Preface Main Components OverviewOverview of rating plates Serial number codificationWater circuit Technical data Operation PreparationDo not insert a capsule yet Procedure to fill water system Fill water systemMaking coffee Programming Reset to factory settings Empty water system Operating modes Left Coffee buttons LED signals Right Coffee machine statusOperating status of coffee buttons Troubleshooting Checking the machine on receiptFurther details in order to take decision General disassembly RepairTool Replacing thermoblock and NTC ToolsReplacing flow meter and On/Off switch Procedure for flow meterProcedure for On/Off switch Replacing pump Replacing electronic control board with button prints Replacing compact brewing unit CBU Pump Pump On/Off switch Repair Carefully read safety instructions on decalcifier package DescalingDescaling Rinsing SecMeasuring flow rate Checking for leaks and pump pressure Preparation unplug machine from mainsSwitch off machine Open valve to empty pressure gauge Measuring coffee temperature Coffee temperature should be approx C ± 3 C 187 F ± 5.4 FDaily care and final cleaning Procedure machine is switched offRepair accessories Spare PartsSpare 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