Nespresso EF 474, EF 473 manual Replacing compact brewing unit CBU

Page 22

Repair

Replacing compact brewing unit (CBU)

Tools:

-Torx screwdrivers T10, T20

-Blade screwdriver no. 4

-Oval screwdriver

-Long-nose pliers

-Torque wrench

Procedure:

1.

Remove water tank (33) and drip tray (8)

 

together with drip grid (7) and capsule

 

container (6).

2.

Place machine on the repairing/service

 

holder device (see page 32).

3.

Remove 4 screws (2) on the bottom of the

 

machine.

4.

Swing out (EF 473) or snap out (EF 474)

 

and remove both side panels (5).

5.

Remove 2 screws (36) and pull off closing

 

handle (37).

6.

Remove 2 screws (23) at the front and 1

 

screw (23) at the back to detach cover (35).

7.

Unlatch coffee outlet (3) from compact

 

brewing unit (34) with a blade screwdriver.

8.

Remove 4 screws (23) and detach

 

 

 

33

 

 

 

23

 

 

 

 

 

 

2

 

36

34

 

 

 

 

 

 

 

35

 

 

 

 

23

 

7+8+6

5

37

 

15

23

36

 

 

14+32

 

 

 

 

 

 

23

 

 

 

 

 

3

 

 

compact brewing unit (34).

9. Remove clip (14) and hose (32) with o-ring

(15) from compact brewing unit (34).

Service Manual EF 473 / EF 474

10.Assemble new compact brewing unit together with new coffee outlet (3) in reverse sequence.

Replace o-ring (15).

22

)Tighten new (EFR nr. 39256) closing handle screws (36) with a torque of 450 N/cm.

Version 1.0 en

Image 22
Contents Essenza FS Contents Preface Main Components OverviewOverview of rating plates Serial number codificationWater circuit Technical data Preparation OperationDo not insert a capsule yet Procedure to fill water system Fill water systemMaking coffee Programming Reset to factory settings Empty water system Coffee machine status Operating modes Left Coffee buttons LED signals RightOperating status of coffee buttons Troubleshooting Checking the machine on receiptFurther details in order to take decision Repair General disassemblyTool Replacing thermoblock and NTC ToolsProcedure for flow meter Replacing flow meter and On/Off switchProcedure for On/Off switch 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 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