Nespresso Ef 473 Users Manual Essenza_Flowstop_en

EF 473 to the manual b85f6903-52e1-471f-adac-af92aab8c47a

2015-01-29

: Nespresso Nespresso-Ef-473-Users-Manual-220463 nespresso-ef-473-users-manual-220463 nespresso pdf

Open the PDF directly: View PDF .
Page Count: 38

Download
Open PDF In Browser	View PDF

en Service Manual Coffee Machine

EF 473
EF 474
Essenza FS

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

Repair

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

_____________________________ 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

Version 1.0 en

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

Version 1.0 en

Main Components
Overview
1)
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
13)
14)
15)
16)
17)
18)
19)
20)

Closing handle
Cover
Compact brewing unit (CBU)
Capsule inlet
Side panel
Flow meter
Button "small cup", back lighted
Coffee outlet
Button "large cup", back lighted
Container for used capsules
Drip grid
Drip tray
Lower chassis
Thermoblock TB 2003
Electronic control board
Pump CP4-SP C2
Water tank connector
On/Off switch
Upper chassis
Water tank

1
5

6
7

20
8
9
10

19
13
18

Service Manual EF 473 / EF 474

Version 1.0 en

Main Components
Overview of rating plates

NESPRESSO Type C100

ref 11244
1260W

220-240V

50Hz

Machine type
Voltage and power rating
Approval seal(s)
Data matrix
Serial number
Bar code (Krups)

1260W

50Hz

Made in Switzerland
Fabriqué en Suisse

0527 8074 7305 9100 015

0043809

220-240V~

MADE IN SWITZERLAND

•
•
•
•
•
•

MAGIMIX M100 AUTO

0044217

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:

0527 8064 7405 2100 017

Typ: KOENIG Capri Automatic 03165

Turmix TX150

220-240V~

TURMIX AG, 8645 Jona, Switzerland

1260W

50Hz

220-240V~

MADE IN SWITZERLAND
KOENIG APPARATE AG ZÜRICH

1260W

50Hz
05105

MADE IN SWITZERLAND

05105

0527 8044 7405 2100 015

278th

220-240V~

1260W

50Hz

Type EN 95.M
220-240V~ 50/60Hz

1260W

P = 19 bar

0527 8014 7405 2100 012
Ser.Nr. 54013 S300075

Service Manual EF 473 / EF 474

TYPE XN 2105

MADE IN EUROPE

MADE IN SWITZERLAND

XN210540/1M0-4005

0044164

production date:
day of year 2005
machine partner codification
machine type
voltage / mains plug version
color version
production site
incremental number per production day
checksum number

0044016

05278
07
473
05
9
1
0001
5

0527 8084 7305 9100 016

0044074

Example: 0527 8074 7305 9100 015

0043801

Serial number codification

0527 8054 7305 4100 017

Version 1.0 en

Main Components
Water circuit
1)
2)
3)
4)
5)
6)
7)

Water tank
Water tank valve and connector
Flow meter
Pump
Thermoblock
Compact brewing unit (CBU)
Coffee outlet

7
1
3

Service Manual EF 473 / EF 474

Version 1.0 en

Main Components
Technical data

Mains

EF 473
291

255 mm

Power consumption

EUR
USA /CAN
JAP

230V / 50 Hz
120 V / 60 Hz
100 V / 50-60 Hz

Approvals

SEV, CENELEC, CE-conform,
UL, CUL, MITI

Cable length

~1,5 m

Pump data
166

EF 474

291

Ratings
Preheating
1 small cup
1 large cup
Stand-by mode

8.0 Wh
(40 ml*) 4.5 Wh
(110 ml*) 9.5 Wh
(in 1 h) 11 Wh

Pump pressure
- max. permissible
17,5 bar ±1,5 bar
- during coffee preparation
9 -13 bar
(depending on brand of coffee)

Various data

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

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

Pre-heating time approx.

Weight of machine

Capacities
Water tank
Drip tray
Capsule container

166

1’200 W
60 W

* factory setting

254 mm

(at all voltages and frequencies)
Thermoblock
Pump

50 s

approx. 3 kg
(without water)

0.9 l
approx. 100 ml
10 - 14 pcs.

Service Manual EF 473 / EF 474

Version 1.0 en

Operation
Preparation
1.
2.
3.
4.

Fill tank with water.
Insert water tank in coffee machine.
Switch on machine with On/Off switch.
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

Version 1.0 en

Operation
Fill water system
2

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

Version 1.0 en

Operation
Making coffee
1.
2.
3.
4.
5.

Open closing handle.
Insert capsule.
Press down closing handle completely.
Position cup under coffee outlet.
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

Version 1.0 en

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

Switch on machine.
Open closing handle.
Insert capsule.
Press down closing handle completely.
Position a cup under coffee outlet.
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
6

1.
2.
3.
4.
5.
6.

Service Manual EF 473 / EF 474

5
1

Version 1.0 en

Operation
Reset to factory settings
1.
2.
3.
4.

Switch off machine.
Press and hold button "large cup".
Switch on machine.
Release button.

2
1

Service Manual EF 473 / EF 474

Version 1.0 en

Operation
Empty water system
5

After operation, residual water remains in the
water circuit.
3

This residual water can be removed
- before a longer period of non-use,
- for frost protection,
- before repair and following shipping.
1.
2.
3.
4.

6.
7.
8.

Switch off machine.
Empty or remove water tank.
Press and hold button "small cup".
Then switch on machine and release
button.
The pump begins to empty the water
system and stops automatically after
approximately 5 seconds.
Simultaneously, open closing handle fully
and press it backwards.
The thermoblock heats up and vaporizes
water residues.
Switch off machine when buttons start to
blink alternately (stand-by).
Close closing handle.
Empty drip tray.

)

4
1

After this procedure the machine is
blocked for approx. 10 minutes (till
thermoblock temperature < 100° C).

Service Manual EF 473 / EF 474

Version 1.0 en

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

left

Coffee buttons
right

LED signals

Off

off

Heat up (coffee) / self-test

blinking slow

Ready

Heat up (descaling)

blinking fast

Small coffee / rinsing /
programming

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

Large coffee / rinsing /
programming

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

Descaling ready

blinking fast

Pump on/off
(while descaling)

blinking fast

Emptying water system

blinking fast

Led blinking fast

Failure

blinking three times fast

Led blinking three times fast

Stand-by

blinking slow, left/right alternately

Resetting

blinking slow

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
Led blinking slow

Service Manual EF 473 / EF 474

Version 1.0 en

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
1 Check appliance for visible
damage

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

Symptoms

Action / repair work

1.1 Parts of housing broken or damaged

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

1.2 Mains cable damaged

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

Further action / repair work

YES - Go to point 2.2
2.1 Closing handle works correctly
2 Check mechanical elements

3 Fill water tank

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

YES - Screw on new closing handle screws at
NO - It is hard or impossible to close the closing handle defined torque (see page 22) or replace CBU
NO - Replace the CBU

2.2 Is the capsule correctly ejected?

YES - Go to point 2.3
NO - Replace CBU

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

YES - Replace CBU
NO - Go to point 3

3.1 Water tank is leaking

YES - Replace water tank
NO - Go to point 4

4.1 Machine is not working (no function)

YES - a) Check if mains cable is functional

YES - Go to point b)
NO - Replace it

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

YES - Go to point c)
NO - Replace it

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

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

YES - d) Check if coffee buttons are functional

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

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

YES - Replace it
NO - Replace pump

YES - Replace it together with electronic control
YES - f) Check if thermoblock’s fine wire fuse (167°C)
board and if necessary with the thermoblock
is defective
NO - Go to point g)

Service Manual EF 473 / EF 474

Version 1.0 en

Troubleshooting
Check procedure

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

Symptoms

Action / repair work
YES - g) Check if electrical wires are functional

4.1 Machine is not working (no function)
- continued

Further action / repair work
YES - Replace electronic mainboard
NO - Replace defective(s) wire(s)

NO - Go to point 4.2

YES - Check if thermoblock heating element is func4.2 Backlighted coffee button blinks at irregular tional
intervals
NO - Self test ok. Go to point 5
YES - a) Water circuit is empty

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

YES - b) Flow meter is clogged

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

YES - c) Pyramid plate is clogged

YES - Replace CBU
NO - Go to point d)

YES - d) Machine is blocked by scale

YES - Descale machine (see page 25)

5.1 No coffee outlet
5 Check coffee temperature while
preparing a coffee (see page 30)

YES - Replace NTC
NO - Replace thermoblock

NO - Go to point 5.2

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

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

YES - Descale the machine (see page 25)
NO - Go to point 5.3

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

YES - Change NTC
NO - Go to point 6

6.1 Leakage at extraction system

YES - Replace CBU
NO - Go to point 6.2

6.2 Leakage at tubes connection

YES - Replace defective tube and seal
NO - Go to point 6.3
YES - Machine is scaled

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

NO - No trouble found during the check procedure.

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

6.3 Flow rate out of range

7 Descaling process (if needed)

7.1 Machine scaled

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

8 Final cleaning (see page 31)
End of check procedure

Service Manual EF 473 / EF 474

Version 1.0 en

Repair
General disassembly
Tool:
-

Oval screwdriver

)

Empty water system if necessary
(see page 12).

from the mains before
 Unplug
disassembling machine - appliance

must be isolated!

Procedure:
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).

2
22

7+8+6
2

Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Replacing thermoblock and NTC
Tools:
-

)

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

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.
Service Manual EF 473 / EF 474

47 + 48
23
M3.5 x 25

16
13
26

43
900

Version 1.0 en

Repair
Replacing flow meter and On/Off
switch
Tools:
-

Torx screwdriver T10
24

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.

48
47
28

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
switch.

Service Manual EF 473 / EF 474

23
40

50
1a Line

Line 1

to mains

Neutral

2a
On/Off switch

to machine

Version 1.0 en

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).

Version 1.0 en

Repair
Replacing electronic control board
with button prints
Tools:
-

Torx screwdriver T10

service engineer must be
 The
earthed using an earthing strap!

)

Only touch button prints with
dedicated gloves to avoid oxydation.

Procedure:
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.

)

28
1

23
30

Check for correct wiring of electronic
control board (see pages 22, 23 or
24).

Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Replacing compact brewing unit (CBU)
33

Tools:
-

Torx screwdrivers T10, T20
Blade screwdriver no. 4
Oval screwdriver
Long-nose pliers
Torque wrench

23
2

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).

Service Manual EF 473 / EF 474

35
23
37

15
14+32

7+8+6

23
3

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

)

Tighten new (EFR nr. 39256) closing
handle screws (36) with a torque of
450 N/cm.
Version 1.0 en

Repair
Electronic control board, wiring
diagram - Europe (230V / 50 Hz)
1)
2)
3)
4)
5)
6)
7)
8)

Heat sink
Print for button "large cup" with LED
Print for button "small cup" with LED
Flow meter
NTC temperature sensor
Fine-wire fuse on thermoblock
On/Off switch
Fine-wire fuse on pump

Electronic Main Board Print “large cup” Print “small cup”
1

Flow meter
4

Thermoblock
NTC

T 167°C

Line

Neutral

Pump

Heat

GND

Pump

T 128°C
1

On/Off switch
Mains Plug

L N PE
Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Electronic control board, wiring
diagram - USA (UL, 120 V / 60 Hz)
1)
2)
3)
4)
5)
6)
7)
8)

Heat sink
Print for button "large cup" with LED
Print for button "small cup" with LED
Flow meter
NTC temperature sensor
Fine-wire fuse on thermoblock
On/Off switch
Fine-wire fuse on pump

Electronic Main Board Print “large cup” Print “small cup”
1

Flow meter
4

Thermoblock
6

NTC

T 167°C

Line

Neutral

Pump

Heat

Pump

T 128°C

On/Off switch
1

Mains Plug
L N

Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Electronic control board, wiring
diagram - Japan (100 V / 50-60 Hz)
1)
2)
3)
4)
5)
6)
7)
8)

Heat sink
Print for button "large cup" with LED
Print for button "small cup" with LED
Flow meter
NTC temperature sensor
Fine-wire fuse on thermoblock
On/Off switch
Fine-wire fuse on pump

Electronic Main Board Print “large cup” Print “small cup”
1

Flow meter
4

Thermoblock
6

Pump

NTC

T 167°C

Line

Neutral

Pump

Heat

T 128°C

On/Off switch
1

Mains Plug
L N
Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Descaling (1)



Only use Nespresso decalcifier never vinegar!
Decalcifier is aggressive to surfaces.

Preparation:
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
7
4

Descaling:

8. Press button "large cup" to start pump.
9. Let entire descaling solution pass through
coffee outlet.

Service Manual EF 473 / EF 474

3 sec

Version 1.0 en

Repair
Descaling (2)
13

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).

Service Manual EF 473 / EF 474

14
3 sec
17
3 sec
15

17
16

Version 1.0 en

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
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.

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.

10. Perform measurement for approx. 30 sec.
11. There must be at least 60-120 ml water in
the measuring beaker.

6
5

Service Manual EF 473 / EF 474

Version 1.0 en

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.

voltage inside coffee
 Dangerous
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

Version 1.0 en

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).

)

9
8

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

12. Perform visual and acoustic checks on all
pressurized connections.
pump must not be in operation
 The
for longer than 50 s without water

flow.

13. Switch off machine.
14. Open valve to empty pressure gauge.
13

Service Manual EF 473 / EF 474

Version 1.0 en

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).

2
3
1

4
7

5
6

Service Manual EF 473 / EF 474

Version 1.0 en

Repair
Daily care and final cleaning
1
Procedure (machine is switched off):

1.
2.
3.
4.
5.
6.
7.
8.

Eject capsule.
Empty capsule container.
Empty water tank and drip tray.
Clean water tank and drip tray.
Fill tank with fresh water.
Reassemble coffe machine.
Switch on machine.
Press a coffee button and rinse coffee
outlet.
9. Clean coffee machine.

3
5
4

8
7

Service Manual EF 473 / EF 474

Version 1.0 en

Spare Parts
Repair accessories
Pos.
1
2
2
3
4

EFR nr.
*
*
*
0004872
0004878

Component
Pressure gauge
Repairing/service holder device A (for EF 473)
Repairing/service holder device B (for EF 474)
Special screwdriver with oval bit
Oval bit for screwdriver

* Only available through Nespresso. Please call your Nespresso contact.
1

0004878

0004872

Service Manual EF 473 / EF 474

Version 1.0 en

Spare Parts
Spare parts EF 473

Service Manual EF 473 / EF 474

Pos.
1
2
3
5
5
6
7
8
8

EFR nr.
42501
24863
40686
43070
43069
39170
39150
40478
43212

43211

9
10
11
12
13
14
15
16
17
17
17
18
19
20
21
22
23
24
25
25
25
25
25
25

43073
40691
39195
39196
37384
5470
24374
42570
44637

39199
1565
42569
13299
39164
16052
1053
43461
43462
43465
43463

Component
Upper chassis EF 473
Safety screw 3,0 x 12 KST/PT
Coffee outlet & front ring EF 470 (package)
Side panel EF 473 titan-Pelikan
lacquered
Side panelEF 473 black
high finish
Capsule container EF 470
black
Drip grid EF 470 Inox
Drip tray EF 470
print: Krups/Nespresso, silvery
Drip tray EF 473
print: Turmix TX150/Nespresso, silvery
Drip tray EF 473
print: Nespresso Essenza
Automatic, silvery
Hose water tank / pump
Water tank connector assembled
Pump attachment
Pump fixation
Clip D=5mm
Clip to tube 770
O-ring 3,40x1,90 silicone
Angle connection for hoses
Pump 230V EF 473
Pump 120V EF 473
Pump 100V EF 473
Hose pump / thermoblock
O-ring 5,28x1,78 EPDM
Angle connection for pump
Elastic stop
Lower chassis EF 470
Screw 3,0 x 12 Torx 10
Strain relief screwed
Power cord SEV 1,30m
Power cord Cebec 1,30m
Power cord Israel 1,30m
Power cord GB 1,30m
Power cord UL 1,30m
Power cord Japan 1,30m

Version 1.0 en

Spare Parts
Spare parts EF 473 (continued)

Service Manual EF 473 / EF 474

Pos.
26
28
28
28
29
30
31
32
33
34
35
36
37
38
39
40
40
40
41
42
43
46
47
48
49
50
900
900
900
900
900
900

EFR nr.
42572
44636

39153
43060
26392
39198
39142
40685
39168
39256
39162
19799
21542
44638

43202
5245
43233
13697
43066
43067
43059
43068
43101
43095
43094
39630
6328
39263

Component
Angle connection for hoses
Electronic set 230V EF 473
Electronic set 120V EF 473
Electronic set 100V EF 473
"Coffee" button EF 470
"Espresso" button EF 473
Silicon hose
Hose thermoblock / CBU
Water tank EF 470
Compact brewing unit (CBU)
Cover EF 470
Screw M4 x 25 Torx 20
Closing handle EF 470
Screw M4 x 8 Torx 20
Thermal cutoff clip
Thermoblock complete 230V EF 473
Thermoblock complete 120V EF 473
Thermoblock complete 100V EF 473
Bushing insulator electrical
Spring washer M5
Temperature sensor EF 473 (NTC)
Silicon hose flow meter / pump
Flow meter
Holder flow meter EF 473
Support main switch EF 473
Main switch
Safety thermostat 167°C
Strand wire blue 130mm
Strand wire brown 80mm
Strand wire yellow/green 220mm
Strand wire white 100mm
Strand wire black 100mm

Version 1.0 en

Spare Parts
Spare parts EF 474

Service Manual EF 473 / EF 474

Pos.
1
2
3
5
6
7

EFR nr.
42502
24863
40687
43071
39171
39151

43215

40483

43214

8
9
10
11
12
13
14
15
16
17
17
17
18
19
20
21
22
23
24
25
25
25
25
25
25

40481
43073
40691
39195
39196
37384
5470
24374
42570
44637

39199
1565
42569
13299
39165
16052
1053
43461
43462
43465
43463

Component
Upper chassis EF 474
Safety screw 3,0 x 12 KST/PT
Coffee outlet & front ring EF 471 (package)
Side panel EF 474 platin
lacquered
Capsule container EF 471
black
Drip grid EF 471 Inox
Drip tray EF 474
print: Nespresso Essenza
Automatic, silvery
Drip tray EF 474
print: DeLonghi/Nespresso,silvery
Drip tray EF 474
print: Koenig Capri Autom./
Nespresso, silvery
Drip tray EF 474
print: Magimix/Nespresso, silvery
Hose water tank / pump
Water tank connector assembled
Pump attachment
Pump fixation
Clip D=5mm
Clip to tube 770
O-ring 3,40x1,90mm
Angle connection for hoses
Pump 230V EF 473
Pump 120V EF 473
Pump 100V EF 473
Hose pump / thermoblock
O-ring 5,28 x 1,78 EPDM
Angle connection for pump
Elastic stop
Lower chassis EF 471
Screw 3,0 x 12 Torx 10
Strain relief screwed
Power cord SEV 1,30m
Power cord Cebec 1,30m
Power cord Israel 1,30m
Power cord GB 1,30m
Power cord UL 1,30m
Power cord Japan 1,30m

Version 1.0 en

Spare Parts
Spare parts EF 474 (continued)

Service Manual EF 473 / EF 474

Pos.
26
28
28
28
29
30
31
32
33
34
35
36
37
38
39
40
40
40
41
42
43
44
46
47
48
49
50
900
900
900
900
900
900

EFR nr.
42572
44636

39154
43061
26392
39198
39143
40685
39169
39256
43441
19799
21542
44638

43202
5245
43233
18904
13697
43066
43067
43059
43068
43101
43095
43094
39630
6328
39263

Component
Angle connection for hoses
Electronic set 230V EF 473
Electronic set 120V EF 473
Electronic set 100V EF 473
"Coffee" buttonEF 471
"Espresso" button EF 474
Silicon hose
Hose thermoblock / CBU
Water tank EF 471
Compact brewing unit (CBU)
Cover EF 471
Screw M4 x 25 Torx 20
Closing handle EF 471
Screw M4 x 8 Torx 20
Thermal cutoff clip
Thermoblock complete 230V EF 473
Thermoblock complete 120V EF 473
Thermoblock complete 100V EF 473
Bushing insulator electrical
Spring washer M5
Temperature sensor EF 473 (NTC)
Screw 3,0 x 16 Torx 10
Silicon hose flow meter / pump
Flow meter
Holder flow meter EF 473
Support main switch EF 473
Main switch
Safety thermostat 167°C
Strand wire blue 130mm
Strand wire brown 80mm
Strand wire yellow/green 220mm
Strand wire white 100mm
Strand wire black 100mm

Version 1.0 en

Notes

Service Manual EF 473 / EF 474

Version 1.0 en

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.3
Linearized                      : Yes
Page Count                      : 38
Page Mode                       : UseOutlines
XMP Toolkit                     : XMP toolkit 2.9.1-13, framework 1.6
About                           : uuid:907f692a-ebbb-481d-b0e7-73af5ea805a3
Producer                        : Acrobat Distiller 6.0.1 (Windows)
Create Date                     : 2002:09:04 15:15:27Z
Creator Tool                    : FrameMaker 7.2
Modify Date                     : 2005:12:15 16:59:03Z
Document ID                     : uuid:8c33fd5e-82b7-43fe-bb02-88cab6ab0ca1
Format                          : application/pdf
Title                           : Essenza_Flowstop_en.fm
Creator                         : mos
Author                          : mos

EXIF Metadata provided by EXIF.tools

Nespresso Ef 473 Users Manual Essenza_Flowstop_en

EF 473 to the manual b85f6903-52e1-471f-adac-af92aab8c47a

Navigation menu

Versions of this User Manual:

Views

Navigation