Nespresso Essenza FS User manual

en Service Manual Coffee Machine
EF 473
EF 474
Essenza FS

2
Service Manual EF 473 / EF 474 enVersion 1.0
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 _____________________________ 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
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

3
Service Manual EF 473 / EF 474 enVersion 1.0
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.

4
Service Manual EF 473 / EF 474 enVersion 1.0
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
1
20
7
2
3
4
8
9
10
11
12
13
14 15
5
16
19
17
18
6

5
Main Components
Service Manual EF 473 / EF 474 enVersion 1.0
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: 278
th
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
0043801
1260W50Hz
MADE IN SWITZERLAND
0527 8044 7405 2100 015
Typ: KOENIG
Capri Automatic 03165
220-240V~
KOENIG APPARATE AG ZÜRICH 05105
1260W50Hz
Made in Switzerland
0043809
ref 11244
0527 80647405 2100 017
MAGIMIX M100 AUTO
220-240V
Fabriqué en Suisse
1260W50Hz
XN210540/1M0-4005
MADE IN SWITZERLAND
0044164
TYPE XN 2105
0527 80547305 4100 017
220-240V~
0044217
1260W50Hz
MADE IN SWITZERLAND
0527 80747305 9100 015
NESPRESSO Type C100
220-240V~
1260W50Hz
MADE IN SWITZERLAND
0044074
TURMIX AG, 8645 Jona, Switzerland
0527 80847305 9100 016
220-240V~
Turmix TX150
05105
1260W50/60Hz
MADE IN EUROPE
0044016
Type EN 95.M
0527 8014 7405 2100 012
220-240V~
P = 19 bar
Ser.Nr. 54013S300075

6
Main Components
Service Manual EF 473 / EF 474 enVersion 1.0
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
6
7
54
2
1
3

7
Main Components
Service Manual EF 473 / EF 474 enVersion 1.0
Technical data 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
Capacities
Water tank 0.9 l
Drip tray approx. 100 ml
Capsule container 10 - 14 pcs.
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
Weight of machine approx. 3 kg
(without water)
166 mm
255 mm
291 mm
166 mm
254 mm
291 mm
EF 473
EF 474

8
Service Manual EF 473 / EF 474 enVersion 1.0
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.
1
2
6
3
4
5
7

9
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
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.
3
2
6
7
45

10
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
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.
2
1
6
3
45
7

11
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
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".
2
1
3
7
4
5
6
3 sec
8

12
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
Reset to factory settings
1. Switch off machine.
2. Press and hold button "large cup".
3. Switch on machine.
4. Release button.
1
3
4
2

13
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
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
blocked for approx. 10 minutes (till
thermoblock temperature < 100° C).
32
1
7
6
4
5
4
8

14
Operation
Service Manual EF 473 / EF 474 enVersion 1.0
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
Led blinking slow
Led blinking fast
Led blinking three times fast
Operating modes Coffee buttons
left right LED signals
Off off
Heat up (coffee) / self-test blinking slow
Ready on
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
Failure blinking three times fast
Stand-by blinking slow, left/right alternately
Resetting blinking slow

15
Service Manual EF 473 / EF 474 enVersion 1.0
Troubleshooting
Checking the machine on receipt
The receipt check enables you to rapidly
locate faults on the machine and to initiate
appropriate repair action.
Follow the check procedure.
Repair any faults found and check if the
machine is operating perfectly.
Check procedure Symptoms Action / repair work Further action / repair work
1 Check appliance for visible
damage
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
2 Check mechanical elements
2.1 Closing handle works correctly
YES - Go to point 2.2
NO - It is hard or impossible to close the closing handle
YES - Screw on new closing handle screws at
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 Fill water tank 3.1 Water tank is leaking YES - Replace water tank
NO - Go to point 4
4 Turn-on On/Off switch to perform
automatic self test 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 - f) Check if thermoblock’s fine wire fuse (167°C)
is defective
YES - Replace it together with electronic control
board and if necessary with the thermoblock
NO - Go to point g)

16
Troubleshooting
Service Manual EF 473 / EF 474 enVersion 1.0
4 Press On/Off button to perform
automatic self test - continued
4.1 Machine is not working (no function)
- continued
YES - g) Check if electrical wires are functional YES - Replace electronic mainboard
NO - Replace defective(s) wire(s)
NO - Go to point 4.2
4.2 Backlighted coffee button blinks at irregular
intervals
YES - Check if thermoblock heating element is func-
tional
YES - Replace NTC
NO - Replace thermoblock
NO - Self test ok. Go to point 5
5 Check coffee temperature while
preparing a coffee (see page 30)
5.1 No coffee outlet
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)
NO - Go to point 5.2
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 Check for leaks and check flow
rate (see pages 27, 28 and 29)
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
6.3 Flow rate out of range
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.
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
Check procedure Symptoms Action / repair work Further action / repair work

17
Service Manual EF 473 / EF 474 enVersion 1.0
Repair
General disassembly
Tool:
- Oval screwdriver
)Empty water system if necessary
(see page 12).
Unplug from the mains before
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).
5
5
33
7 + 8 + 6
2
2
22
2
2

18
Repair
Service Manual EF 473 / EF 474 enVersion 1.0
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).
40
23
38
38
39
900
43
M3.5 x 25
28
13
26
16
23
47 + 48
40
42

19
Repair
Service Manual EF 473 / EF 474 enVersion 1.0
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
switch.
28
40
50
49
48
47
23
23
23
24
11a
22a
Line
Neutral Neutral
Line
On/Off switch
to mains to machine

20
Repair
Service Manual EF 473 / EF 474 enVersion 1.0
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.
12. Insert new seal (15), mount hose (18) and
clamp (14).
13. Mount angled hose (9).
14
15
9
18
12
17
20
T 128°C
9