Nespresso 473, 474 User Manual

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Page 1

en Service Manual Coffee Machine

EF 473 EF 474

Essenza FS

Page 2

Contents

Preface _____________________________ 3

Main Components__________________ 4

Overview ___________________________ 4 Overview of rating plates ______________ 5 Water circuit_________________________ 6 Technical data _______________________ 7

Operation___________________________ 8

Preparation _________________________ 8 Fill water system _____________________ 9 Making coffee ______________________ 10 Programming _______________________ 11 Reset to factory settings______________ 12 Empty water system _________________ 13 Coffee machine status _______________ 14

Troubleshooting___________________ 15

Checking the machine on receipt ______ 15

Electronic control board, wiring diagram USA (UL, 120 V / 60 Hz) _____________ 24

Electronic control board, wiring diagram Japan (100 V / 50-60 Hz)_____________ 25

Descaling (1) _______________________ 26 Descaling (2) _______________________ 27 Measuring flow rate _________________ 28 Checking for leaks and pump

pressure (1) ________________________ 29 Checking for leaks and pump

pressure (2) ________________________ 30 Measuring coffee temperature ________ 31 Daily care and final cleaning __________ 32

Spare Parts ________________________ 33

Repair accessories __________________ 33 Spare parts EF 473__________________ 34 Spare parts EF 474__________________ 36

Notes ______________________________ 38

Repair _____________________________ 17

General disassembly ________________ 17 Replacing thermoblock and NTC ______ 18 Replacing flow meter and On/Off switch 19 Replacing pump ____________________ 20 Replacing electronic control board with

button prints ________________________ 21 Replacing compact brewing unit (CBU) _22 Electronic control board, wiring diagram -

Europe (230V / 50 Hz) _______________ 23

Service Manual EF 473 / EF 474 enVersion 1.0

Page 3

Preface

The purpose of this Service Manual is to provide the service personnel with all necessary information with regards to correct handling, maintenance and repair of the coffee machines EF 473 and EF 474.

This manual should be used by the technicians as a valuable aid to guarantee the permanent readiness for use of the machine. In order to take full advantage of all the functions, it is absolutely necessary to follow the instructions in this manual.

Please keep this manual together with the corresponding service documentation. This way you are assured to have the necessary information.

For fast access to information directly from the PC or MAC monitor, this manual is also available on CD-ROM. The required utility (Adobe Acrobat), also on this CD-ROM, runs on PC and MAC computers.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 4

Main Components

Overview

1) Closing handle

2) Cover

3) Compact brewing unit (CBU)

4) Capsule inlet

5) Side panel

6) Flow meter

7) Button "small cup", back lighted

8) Coffee outlet

9) Button "large cup", back lighted

10) Container for used capsules

11) Drip grid

12) Drip tray

13) Lower chassis

14) Thermoblock TB 2003

15) Electronic control board

16) Pump CP4-SP C2

17) Water tank connector

18) On/Off switch

19) Upper chassis

20) Water tank

6 7

Service Manual EF 473 / EF 474 enVersion 1.0

Page 5

Main Components

Overview of rating plates

The rating plate

- can be found at the underside of the coffee machine,

- may be of varying design, depending on the brand,

- carries the following information:

• Machine type

• Voltage and power rating

• Approval seal(s)

• Data matrix

• Serial number

• Bar code (Krups)

Serial number codification

Example: 0527 8074 7305 9100 015

05278 production date: 278th day of year 2005 07 machine partner codification 473 machine type 05 voltage / mains plug version 9 color version 1 production site 0001 incremental number per production day 5 checksum number

NESPRESSO

220-240V~

1260W50Hz

MADE IN SWITZERLAND

Type C100

0527 8074 7305 9100 015

Typ: KOENIG

220-240V~

MADE IN SWITZERLAND

KOENIG APPARATE AG ZÜRICH 05105

Capri Automatic 03165

1260W50Hz

0527 8044 7405 2100 015

MADE IN EUROPE

Type EN 95.M

220-240V~

0527 8014 7405 2100 012

Ser.Nr. 54013 S300075

1260W50/60Hz

P = 19 bar

4217 004

0043801

0044016

MAGIMIX M100 AUTO

ref 11244

220-240V Made in Switzerland

Fabriqué en Suisse

1260W50Hz

0527 8064 7405 2100 017

Turmix TX150

TURMIX AG, 8645 Jona, Switzerland

220-240V~ MADE IN SWITZERLAND

0527 8084 7305 9100 016

220-240V~

0527 8054 7305 4100 017

1260W50Hz

TYPE XN 2105

1260W50Hz

MADE IN SWITZERLAND

XN210540/1M0-4005

05105

0044164

0043809

0044074

Service Manual EF 473 / EF 474 enVersion 1.0

Page 6

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 enVersion 1.0

Page 7

Main Components

Technical data

EF 473

291 mm

166 mm

EF 474

291 mm

255 mm

Mains

EUR 230V / 50 Hz USA /CAN 120 V / 60 Hz JAP 100 V / 50-60 Hz

Approvals SEV, CENELEC, CE-conform,

UL, CUL, MITI

Cable length ~1,5 m

Pump data

Pump pressure

- max. permissible 17,5 bar ±1,5 bar

- during coffee preparation 9 -13 bar (depending on brand of coffee)

Flow performance 120-240 ml/min. at 12 bar

Power consumption

(at all voltages and frequencies) Thermoblock 1’200 W Pump 60 W

Ratings

Preheating 8.0 Wh 1 small cup (40 ml*) 4.5 Wh 1 large cup (110 ml*) 9.5 Wh Stand-by mode (in 1 h) 11 Wh

* factory setting

Various data

Pre-heating time approx. 50 s

Safety temperature (thermal cut-off) 167° C Coffee temperature at outlet 86° C ± 3° C

254 mm

Capacities

(without water) Water tank 0.9 l Drip tray approx. 100 ml Capsule container 10 - 14 pcs.

166 mm

Weight of machine approx. 3 kg

Service Manual EF 473 / EF 474 enVersion 1.0

Page 8

Operation

Preparation

1. Fill tank with water.

2. Insert water tank in coffee machine.

3. Switch on machine with On/Off switch.

4. Position receptacle with a capacity of min.100 ml under coffee outlet.

Do not insert a capsule yet.

)

5. Wait until machine is ready (both buttons are lighted).

6. Press button "small cup" or "large cup" to rinse coffee outlet.

7. Press the same button again in case the receptacle is filled.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 9

Operation

Fill water system

If the coffee machine cannot pump water although there is water in the tank, the water circuit may be empty.

Procedure to fill water system:

1. Perform steps 1 to 5 for preparation (see page 8).

2. Open closing handle in vertical position.

3. Press button "large cup".

4. Press and hold closing handle to rear end position.

5. Observe capsule inlet for appearing water.

6. Press down closing handle immediately when first droplets are visible.

7. Press button "large cup" again to stop water flow.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 10

Operation

Making coffee

1. Open closing handle.

2. Insert capsule.

3. Press down closing handle completely.

4. Position cup under coffee outlet.

5. Press button "small cup" or "large cup". Coffee flow starts and stops automaticly.

6. In case the cup is going to flow over, press the same button again.

7. Briefly open closing handle after coffee preparation and eject capsule into capsule container.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 11

Operation

Programming

The filling amount for coffee is preset and can be changed with the following procedure.

Factory settings:

)

Button "small cup" ........................40ml

Button "large cup".......................110ml

1. Switch on machine.

2. Open closing handle.

3. Insert capsule.

4. Press down closing handle completely.

5. Position a cup under coffee outlet.

6. Press and hold button "small cup" for at least 3 seconds to start the programming mode.

7. Release button after desired filling amount is in cup.

8. Briefly open closing handle after coffee preparation and eject capsule into capsule container.

9. Repeat programming procedure with button "large cup".

3 sec

Service Manual EF 473 / EF 474 enVersion 1.0

Page 12

Operation

Reset to factory settings

1. Switch off machine.

2. Press and hold button "large cup".

3. Switch on machine.

4. Release button.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 13

Operation

Empty water system

After operation, residual water remains in the water circuit.

This residual water can be removed

- before a longer period of non-use,

- for frost protection,

- before repair and following shipping.

1. Switch off machine.

2. Empty or remove water tank.

3. Press and hold button "small cup".

4. Then switch on machine and release button. The pump begins to empty the water system and stops automatically after approximately 5 seconds.

5. Simultaneously, open closing handle fully and press it backwards. The thermoblock heats up and vaporizes water residues.

6. Switch off machine when buttons start to blink alternately (stand-by).

7. Close closing handle.

8. Empty drip tray.

After this procedure the machine is

)

Service Manual EF 473 / EF 474 enVersion 1.0

blocked for approx. 10 minutes (till thermoblock temperature < 100° C).

Page 14

Operation

Coffee machine status

After switching on, an automatic self-test is performed to check if

- the NTC is connected,

- the NTC is short circuited,

- the thermoblock reaches the standby temperature within 2 minutes.

Operating modes and detected failures are indicated by backlighted coffee buttons as listed in the following table.

Operating status of coffee buttons

Led off

Led on

Operating modes

Off off

Heat up (coffee) / self-test blinking slow

Ready on

Heat up (descaling) blinking fast

Small coffee / rinsing / programming

Large coffee / rinsing / programming

Descaling ready blinking fast

Pump on/off (while descaling)

Coffee buttons

left right

LED signals

Button “small cup“ is blinking slow Button “large cup“ is on

Button “small cup“ is on Button “large cup“ is blinking slow

blinking fast

Led blinking slow

Led blinking fast

Led blinking three times fast

Service Manual EF 473 / EF 474 enVersion 1.0

Emptying water system blinking fast

Failure blinking three times fast

Stand-by blinking slow, left/right alternately

Resetting blinking slow

Page 15

Troubleshooting

Checking the machine on receipt

The receipt check enables you to rapidly locate faults on the machine and to initiate appropriate repair action.

Check procedure Symptoms Action / repair work Further action / repair work

1 Check appliance for visible damage

2 Check mechanical elements

3 Fill water tank 3.1 Water tank is leaking

4 Turn-on On/Off switch to perform automatic self test

1.1 Parts of housing broken or damaged

1.2 Mains cable damaged

2.1 Closing handle works correctly

2.2 Is the capsule correctly ejected?

2.3 Is the capsule cage seal damaged? (feel with a finger if the seal is damaged)

4.1 Machine is not working (no function)

Follow the check procedure. Repair any faults found and check if the machine is operating perfectly.

YES - Replace parts if necessary NO - Go to point 1.2

YES - Replace mains cable NO - Plug machine to the mains and go to point 2.1

YES - Go to point 2.2

NO - It is hard or impossible to close the closing handle

YES - Go to point 2.3 NO - Replace CBU

YES - Replace CBU NO - Go to point 3

YES - Replace water tank NO - Go to point 4

YES - a) Check if mains cable is functional

YES - b) Check if On/Off switch is functional

YES - c) Check if pump is working (press coffee button)

YES - d) Check if coffee buttons are functional

YES - e) Check if pump's fine wire fuse (128°C) is defective

YES - f) Check if thermoblock’s fine wire fuse (167°C) is defective

YES - Screw on new closing handle screws at defined torque (see page 22) or replace CBU NO - Replace the CBU

YES - Go to point b) NO - Replace it

YES - Go to point c) NO - Replace it

YES - Go to point f) NO - Go to point d)

YES - Go to point e) NO - Replace defective button(s)

YES - Replace it NO - Replace pump

YES - Replace it together with electronic control board and if necessary with the thermoblock NO - Go to point g)

Service Manual EF 473 / EF 474 enVersion 1.0

Page 16

Troubleshooting

Check procedure Symptoms Action / repair work Further action / repair work

4.1 Machine is not working (no function)

4 Press On/Off button to perform automatic self test - continued

5 Check coffee temperature while preparing a coffee (see page 30)

6 Check for leaks and check flow rate (see pages 27, 28 and 29)

7 Descaling process (if needed) 7.1 Machine scaled

8 Final cleaning (see page 31)

- continued

4.2 Backlighted coffee button blinks at irregular intervals

5.1 No coffee outlet

5.2 Temperature is too low (less than 83°C)

5.3 Temperature is too high (more than 89°C)

6.1 Leakage at extraction system

6.2 Leakage at tubes connection

6.3 Flow rate out of range

YES - g) Check if electrical wires are functional

NO - Go to point 4.2 YES - Check if thermoblock heating element is func-

tional NO - Self test ok. Go to point 5

YES - a) Water circuit is empty

YES - b) Flow meter is clogged

YES - c) Pyramid plate is clogged

YES - d) Machine is blocked by scale YES - Descale machine (see page 25) NO - Go to point 5.2 YES - Descale the machine (see page 25)

NO - Go to point 5.3 YES - Change NTC

NO - Go to point 6 YES - Replace CBU

NO - Go to point 6.2 YES - Replace defective tube and seal

NO - Go to point 6.3

YES - Machine is scaled

NO - No trouble found during the check procedure.

YES - Descale machine (see page 25) NO - Go to point 8

YES - Replace electronic mainboard NO - Replace defective(s) wire(s)

YES - Replace NTC NO - Replace thermoblock

YES - Fill water circuit (see page 9) NO - Go to point b)

YES - Clean or replace it NO - Go to point c)

YES - Replace CBU NO - Go to point d)

YES - Descale machine (see page 25) NO - Replace pump

Contact Nespresso Technical Correspondant for further details in order to take decision.

End of check procedure

Service Manual EF 473 / EF 474 enVersion 1.0

Page 17

Repair

General disassembly

Tool:

- Oval screwdriver

Empty water system if necessary

)



Procedure:

(see page 12).

Unplug from the mains before disassembling machine - appliance must be isolated!

1. Remove water tank (33) and drip tray (8) together with drip grid (7) and capsule container (6).

2. Remove 2 screws (2) on the front side of the machine.

3. Place machine on the repairing/service holder device (see page 32).

4. Remove 6 screws (2) on the bottom of the machine.

5. Swing out (EF 473) or snap out (EF 474) and remove both side panels (5).

6. Remove lower chassis (22).

7 + 8 + 6

Service Manual EF 473 / EF 474 enVersion 1.0

Page 18

Repair

Replacing thermoblock and NTC

Tools:

- Torx screwdrivers T10, T30

- Open-ended spanner 10 mm AF

- Torque wrench

Procedure:

1. Follow general disassembly (see page 16).

2. Remove screw (23) and detach holder (48) with flow meter (47).

3. Remove 3 screws (23) and separate thermoblock (40) with support (40) from chassis.

4. Remove screw M3.5 x 25, washer and rubber gasket and separate thermoblock (40) from its support.

5. Remove screw (38) and separate fine wire fuse (900) from thermoblock.

6. Remove electronic housing (28).

7. Unplug NTC connector from electronic control board (28).

8. Remove NTC (43) from thermoblock and replace it if defective.

9. Remove clips (13) and hose connectors (16, 26) from thermoblock.

10. Remove ground wire and electrical connections from thermoblock.

11. Replace defective thermoblock.

12. Assemble in reverse sequence.

)

Use a torque wrench (90 - 110 Ncm) to tighten NTC temperature sensor (43) with spring washer (42).

M3.5 x 25

900

47 + 48

Service Manual EF 473 / EF 474 enVersion 1.0

Page 19

Repair

Replacing flow meter and On/Off switch

Tools:

- Torx screwdriver T10

Procedure for flow meter:

1. Follow general disassembly (see page 16).

2. Remove screw (23) and detach holder (48) with flow meter (47).

3. Snap holder (48) from flow meter (47).

4. Unplug connector from flow meter (47).

5. Remove hoses from flow meter (47) and replace it.

6. Assemble in reverse sequence.

Procedure for On/Off switch:

1. Follow general disassembly (see page 16).

2. Remove screw (23) and detach support (49) with On/Off switch (50).

3. Remove 2 screws (23) and strain relief (24) of mains cable.

4. Press in lockings and slide support (49) backwards.

5. Unplug all connectors from On/Off switch (50) and replace it.

6. Assemble in reverse sequence.

Check for correct wiring of On/Off

)

Service Manual EF 473 / EF 474 enVersion 1.0

switch.

to mains

Neutral Neutral

Line

On/Off switch

Line

to machine

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.

T 128°C

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

13. Mount angled hose (9).

Service Manual EF 473 / EF 474 enVersion 1.0

Page 21

Repair

Replacing electronic control board with button prints

Tools:

- Torx screwdriver T10

The service engineer must be



)

Procedure:

earthed using an earthing strap!

Only touch button prints with dedicated gloves to avoid oxydation.

1. Follow general disassembly (see page 16).

2. Detach prints of buttons "small cup" (30) and "large cup" (29) from upper chassis (1).

3. Remove housing (28) from electronic control board (28).

4. Unplug NTC connector and all wires from electronic control board (28).

5. Unplug connector at flow meter (47).

6. Remove 2 screws (23) and replace defective electronic control board with button prints (29, 30).

7. Assemble in reverse sequence.

Check for correct wiring of electronic

)

Service Manual EF 473 / EF 474 enVersion 1.0

control board (see pages 22, 23 or

24).

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 compact brewing unit (34).

9. Remove clip (14) and hose (32) with o-ring (15) from compact brewing unit (34).

10. Assemble new compact brewing unit together with new coffee outlet (3) in reverse sequence. Replace o-ring (15).

15 14+32

)

7+8+6

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

Service Manual EF 473 / EF 474 enVersion 1.0

Page 23

Repair

Electronic control board, wiring diagram - Europe (230V / 50 Hz)

1) Heat sink

2) Print for button "large cup" with LED

3) Print for button "small cup" with LED

4) Flow meter

5) NTC temperature sensor

6) Fine-wire fuse on thermoblock

7) On/Off switch

8) Fine-wire fuse on pump

Electronic Main Board

Print “large cup”

Thermoblock

Print “small cup”

Flow meter

Pump

Heat

Pump

Neutral

T 128°C

Line

NTC

GND

T 167°C

On/Off switch

Mains Plug

L N PE

Service Manual EF 473 / EF 474 enVersion 1.0

Page 24

Repair

Electronic control board, wiring diagram - USA (UL, 120 V / 60 Hz)

1) Heat sink

2) Print for button "large cup" with LED

3) Print for button "small cup" with LED

4) Flow meter

5) NTC temperature sensor

6) Fine-wire fuse on thermoblock

7) On/Off switch

8) Fine-wire fuse on pump

Electronic Main Board

Print “large cup”

Thermoblock

NTC

Print “small cup”

Flow meter

T 167°C

Pump

Heat

Pump

Neutral

Line

T 128°C

On/Off switch

Mains Plug

L N

Service Manual EF 473 / EF 474 enVersion 1.0

Page 25

Repair

Electronic control board, wiring diagram - Japan (100 V / 50-60 Hz)

1) Heat sink

2) Print for button "large cup" with LED

3) Print for button "small cup" with LED

4) Flow meter

5) NTC temperature sensor

6) Fine-wire fuse on thermoblock

7) On/Off switch

8) Fine-wire fuse on pump

Electronic Main Board

Heat

Pump

Neutral

Line

Print “large cup”

Thermoblock

NTC

Print “small cup”

Flow mete

T 167°C

Pump

T 128°C

On/Off switch

Mains Plug

L N

Service Manual EF 473 / EF 474 enVersion 1.0

Page 26

Repair

Descaling (1)

Only use Nespresso decalcifier -



Preparation:

)

never vinegar! Decalcifier is aggressive to surfaces.

1. Switch off machine.

2. Eject capsule. Insert filter from descaling kit in capsule inlet and close handle.

3. Empty drip tray and capsule container and remove drip grid.

4. Re-insert drip tray and place a pot on it.

Carefully read safety instructions on decalcifier package.

5. Fill water tank with 0.1 l descaling fluid and 0.5 l water. Re-insert water tank.

6. Switch on machine.

7. Press and hold both coffee buttons for at least 3 seconds to start descaling mode (fast blinking coffee buttons). The temperature of the thermoblock is regulated to 65° C.

3 sec

Descaling:

8. Press button "large cup" to start pump.

9. Let entire descaling solution pass through coffee outlet.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 27

Repair

Descaling (2)

10. Fill water tank again with descaling solution from pot.

11. Repeat descaling procedure one more time: Press button "large cup" and let entire descaling solution run through.

Rinsing:

12. Empty pot.

13. Remove filter from capsule inlet.

14. Rinse water tank thoroughly and fill it with fresh water.

15. Place pot on drip tray.

16. Press button "large cup" to start pump. Let complete content of water tank run through coffee outlet.

17. Press both coffee buttons simultaneously for at leat 3 seconds to exit the descaling mode.

18. Insert drip grid.

19. Clean machine.

When machine is switched off during

)

descaling procedure: After machine is switched on again, it is in the ready state (slow blinking coffee buttons) and resumes with the descaling procedure (fast blinking coffee buttons).

3 sec

Service Manual EF 473 / EF 474 enVersion 1.0

Page 28

Repair

Measuring flow rate

Procedure:

1. Fill water tank.

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 measuring beaker underneath exit tube of pressure plug.

6. Switch on machine.

7. Press button "large cup" after heating-up.

8. Open valve fully till water begins to flow.

9. Close valve until 12 bar are indicated.

The manometer must be observed

)

10. Perform measurement for approx. 30 sec.

11. There must be at least 60-120 ml water in

continuously and the pressure regulated using the valve if necessary. With increasing temperature the pressure also increases, if necessary readjust the pressure to 12 bar.

the measuring beaker.

Notice:

- With a flow of < 60 ml the pump is defective or there is a leak in the system.

- Large fluctuations in the pressure gauge readings (± 4 bar) during measurement are indicative of a defective pump.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 29

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



Continued on next page.

Service Manual EF 473 / EF 474 enVersion 1.0

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.

Page 30

Repair

Checking for leaks and pump pressure (2)

Procedure (continued):

8. Switch on machine.

9. Press button "large cup" after heating-up.

10. Open valve and leave water to run out for approx. 10 s.

11. Fully close valve. The pressure will rise rapidly initially and stabilise between 16 - 19 bar (check of pump pressure).

The pressure will rise slowly due to

)

12. Perform visual and acoustic checks on all

the temperature increase. If the pressure exceeds 23 bar, the machine has to be switched off and pressure released through the pressure valve.

pressurized connections.

The pump must not be in operation



13. Switch off machine.

14. Open valve to empty pressure gauge.

Service Manual EF 473 / EF 474 enVersion 1.0

for longer than 50 s without water flow.

Page 31

Repair

Measuring coffee temperature

Procedure:

1. Switch on machine.

2. Position measuring beaker underneath coffee outlet.

3. After warming up, press button "large cup" and preheat coffee outlet with hot water.

4. Insert a capsule (Cosi is the most suitable).

5. Press a button "large cup".

6. Wait until 20 ml coffee has flown in the measuring beaker.

7. Measure the coffee temperature approx. 5 - 10 mm below the outlet opening.

Coffee temperature should be

)

approx. 86 °C ± 3 °C (187 °F ± 5.4 °F).

Service Manual EF 473 / EF 474 enVersion 1.0

Page 32

Repair

Daily care and final cleaning

Procedure (machine is switched off):

1. Eject capsule.

2. Empty capsule container.

3. Empty water tank and drip tray.

4. Clean water tank and drip tray.

5. Fill tank with fresh water.

6. Reassemble coffe machine.

7. Switch on machine.

8. Press a coffee button and rinse coffee outlet.

9. Clean coffee machine.

Service Manual EF 473 / EF 474 enVersion 1.0

Page 33

Spare Parts

Repair accessories

0004878

Pos. EFR nr. Component

1 * Pressure gauge 2 * Repairing/service holder device A (for EF 473) 2 * Repairing/service holder device B (for EF 474) 3 0004872 Special screwdriver with oval bit 4 0004878 Oval bit for screwdriver

Only available through Nespresso. Please call your Nespresso contact.

0004872

Service Manual EF 473 / EF 474 enVersion 1.0

Page 34

Spare Parts

Spare parts EF 473

Pos. EFR nr. Component

1 42501 Upper chassis EF 473 2 24863 Safety screw 3,0 x 12 KST/PT 3 40686 Coffee outlet & front ring EF 470 (package) 5 43070 Side panel EF 473 titan-Pelikan lacquered 5 43069 Side panelEF 473 black high finish 6 39170 Capsule container EF 470 black 7 39150 Drip grid EF 470 Inox 8 40478 Drip tray EF 470 print: Krups/Nespresso, silvery 8 43212 Drip tray EF 473 print: Turmix TX150/Nespresso, silvery

8 43211

9 43073 Hose water tank / pump 10 40691 Water tank connector assembled 11 39195 Pump attachment 12 39196 Pump fixation 13 37384 Clip D=5mm 14 5470 Clip to tube 770 15 24374 O-ring 3,40x1,90 silicone 16 42570 Angle connection for hoses 17 44637 Pump 230V EF 473 17 Pump 120V EF 473 17 Pump 100V EF 473 18 39199 Hose pump / thermoblock 19 1565 O-ring 5,28x1,78 EPDM 20 42569 Angle connection for pump 21 13299 Elastic stop 22 39164 Lower chassis EF 470 23 16052 Screw 3,0 x 12 Torx 10 24 1053 Strain relief screwed 25 43461 Power cord SEV 1,30m 25 43462 Power cord 25 43465 Power cord Israel 1,30m 25 43463 Power cord GB 1,30m 25 Power cord UL 1,30m 25 Power cord Japan 1,30m

Drip tray EF 473 print: Nespresso Essenza

Automatic, silvery

Cebec 1,30m

Service Manual EF 473 / EF 474 enVersion 1.0

Page 35

Spare Parts

Spare parts EF 473 (continued)

Pos. EFR nr. Component

26 42572 Angle connection for hoses 28 44636 Electronic set 230V EF 473 28 Electronic set 120V EF 473 28 Electronic set 100V EF 473 29 39153 "Coffee" button EF 470 30 43060 "Espresso" button EF 473 31 26392 Silicon hose 32 39198 Hose thermoblock / CBU 33 39142 Water tank EF 470 34 40685 Compact brewing unit (CBU) 35 39168 Cover EF 470 36 39256 Screw M4 x 25 Torx 20 37 39162 Closing handle EF 470 38 19799 Screw M4 x 8 Torx 20 39 21542 Thermal cutoff clip 40 44638 Thermoblock complete 230V EF 473 40 Thermoblock complete 120V EF 473 40 Thermoblock complete 100V EF 473 41 43202 Bushing insulator electrical 42 5245 Spring washer M5 43 43233 Temperature sensor EF 473 (NTC) 46 13697 Silicon hose flow meter / pump 47 43066 Flow meter 48 43067 Holder flow meter EF 473 49 43059 Support main switch EF 473 50 43068 Main switch

900 43101 Safety thermostat 167°C 900 43095 Strand wire blue 130mm 900 43094 Strand wire brown 80mm 900 39630 Strand wire yellow/green 220mm 900 6328 Strand wire white 100mm 900 39263 Strand wire black 100mm

Service Manual EF 473 / EF 474 enVersion 1.0

Page 36

Spare Parts

Spare parts EF 474

Pos. EFR nr. Component

1 42502 Upper chassis EF 474

2 24863 Safety screw 3,0 x 12 KST/PT

3 40687 Coffee outlet & front ring EF 471 (package)

5 43071 Side panel EF 474 platin lacquered

6 39171 Capsule container EF 471 black

7 39151 Drip grid EF 471 Inox

8 43215

8 40483 Drip tray EF 474 print: DeLonghi/Nespresso,silvery

8 43214

8 40481 Drip tray EF 474 print: Magimix/Nespresso, silvery

9 43073 Hose water tank / pump 10 40691 Water tank connector assembled 11 39195 Pump attachment 12 39196 Pump fixation 13 37384 Clip D=5mm 14 5470 Clip to tube 770 15 24374 O-ring 3,40x1,90mm 16 42570 Angle connection for hoses 17 44637 Pump 230V EF 473 17 Pump 120V EF 473 17 Pump 100V EF 473 18 39199 Hose pump / thermoblock 19 1565 O-ring 5,28 x 1,78 EPDM 20 42569 Angle connection for pump 21 13299 Elastic stop 22 39165 Lower chassis EF 471 23 16052 Screw 3,0 x 12 Torx 10 24 1053 Strain relief screwed 25 43461 Power cord 25 43462 Power cord 25 43465 Power cord Israel 25 43463 Power cord 25 Power cord 25 Power cord

Drip tray EF 474 print: Nespresso Essenza

Automatic, silvery

Drip tray EF 474 print: Koenig Capri Autom./

Nespresso, silvery

SEV 1,30m Cebec 1,30m

1,30m GB 1,30m UL 1,30m Japan 1,30m

Service Manual EF 473 / EF 474 enVersion 1.0

Page 37

Spare Parts

Spare parts EF 474 (continued)

Pos. EFR nr. Component

26 42572 Angle connection for hoses 28 44636 Electronic set 230V EF 473 28 Electronic set 120V EF 473 28 Electronic set 100V EF 473 29 39154 "Coffee" buttonEF 471 30 43061 "Espresso" button EF 474 31 26392 Silicon hose 32 39198 Hose thermoblock / CBU 33 39143 Water tank EF 471 34 40685 Compact brewing unit (CBU) 35 39169 Cover EF 471 36 39256 Screw M4 x 25 Torx 20 37 43441 Closing handle EF 471 38 19799 Screw M4 x 8 Torx 20 39 21542 Thermal cutoff clip 40 44638 Thermoblock complete 230V EF 473 40 Thermoblock complete 120V EF 473 40 Thermoblock complete 100V EF 473 41 43202 Bushing insulator electrical 42 5245 Spring washer M5 43 43233 Temperature sensor EF 473 (NTC) 44 18904 Screw 3,0 x 16 Torx 10 46 13697 Silicon hose flow meter / pump 47 43066 Flow meter 48 43067 Holder flow meter EF 473 49 43059 Support main switch EF 473

50 43068 Main switch 900 43101 Safety thermostat 167°C 900 43095 Strand wire blue 130mm 900 43094 Strand wire brown 80mm 900 39630 Strand wire yellow/green 220mm 900 6328 Strand wire white 100mm 900 39263 Strand wire

black 100mm

Service Manual EF 473 / EF 474 enVersion 1.0

Page 38

Notes

Service Manual EF 473 / EF 474 enVersion 1.0

Nespresso 473, 474 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Main Components

Overview

Overview of rating plates

Water circuit

Technical data

Operation

Preparation

Fill water system

Making coffee

Programming

Reset to factory settings

Empty water system

Coffee machine status

Troubleshooting

Checking the machine on receipt

Repair

General disassembly

Replacing thermoblock and NTC

Replacing flow meter and On/Off switch

Replacing pump

Replacing electronic control board with button prints

Replacing compact brewing unit (CBU)

Electronic control board, wiring diagram - Europe (230V / 50 Hz)

Electronic control board, wiring diagram - USA (UL, 120 V / 60 Hz)

Electronic control board, wiring diagram - Japan (100 V / 50-60 Hz)

Descaling (1)

Descaling (2)

Measuring flow rate

Checking for leaks and pump pressure (1)

Checking for leaks and pump pressure (2)

Measuring coffee temperature

Daily care and final cleaning

Spare Parts

Repair accessories

Spare parts EF 473

Spare parts EF 474

Notes