Nespresso EF 474, EF 473 manual Replacing pump

Page 20

Repair

Replacing pump

Tools:

-Torx screwdriver T10

-Long-nose pliers

-Blade screwdriver, no. 7

Procedure:

1.Follow general disassembly (see page 16)

2.Unplug fixed pump cable and electrical connection on pump (17).

3.Remove clip (14), hose (18) and o-ring

(15).

4.Remove angled hose (9).

5.Release pump (17) first from rubber strap

(12)at the side of the angled hose.

6.Release pump from second rubber strap

(12)and remove right angled connector

(20).

7.Replace defective pump (17).

8.Fix right angled connector (20) to new pump (17).

9.Attach new pump (17) to rubber strap with right angled connector (20) first.

10.Plug in electrical connection on pump and connect pump cable.

)Check for correct wiring of pump. 11. Attach pump to second rubber strap.

Service Manual EF 473 / EF 474

9

12

T 128°C

9

18

17

15

14

20

12.Insert new seal (15), mount hose (18) and clamp (14).

13.Mount angled hose (9).

20

Version 1.0 en

Image 20
Contents Essenza FS Contents Preface Main Components OverviewOverview of rating plates Serial number codificationWater circuit Technical data Do not insert a capsule yet OperationPreparation Procedure to fill water system 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 Troubleshooting Checking the machine on receiptFurther details in order to take decision Tool General disassembly Repair Replacing thermoblock and NTC ToolsProcedure 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 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