Page 1
en
enVersion 1.0
Service Manual Coffee Machine
Essenza
EF 347 / C99
Essenza
EF 348 / D99
Page 2
2
Service Manual EF 347 / EF 348 enVersion 1.0
Contents
Preface______________________________________________ 3
General _____________________________________________ 3
Nespresso technical website_____________________________ 3
Content updates ______________________________________ 3
General Safety Notes ________________________________ 4
Main Components ___________________________________ 5
Overview ____________________________________________ 5
Overview of rating plates________________________________ 6
Rating Plates - Essenza machine partners __________________ 7
Water circuit _________________________________________ 8
Tech nical D ata _______________________________________ 9
Operation __________________________________________ 10
Making coffee _______________________________________ 10
Programming the water system__________________________ 11
Emptying the water system _____________________________ 12
Energy saving mode __________________________________ 13
Reset to factory settings _______________________________ 14
Coffee machine status (1) ______________________________ 15
Coffee machine status (2) ______________________________ 16
Troubleshooting____________________________________ 17
Check Machine on receipt______________________________ 17
Repair______________________________________________ 20
Safety instructions ____________________________________ 20
General disassembly__________________________________ 21
Replacing NTC ______________________________________ 22
Replacing thermoblock ________________________________ 23
Replacing pump______________________________________ 24
Replacing electronic control board with button prints _________ 25
Replacing compact brewing unit _________________________ 26
Wiring diagram 220V - 240V IEC_________________________ 27
Wiring diagram 120V - 127V IEC_________________________ 28
Function Tests______________________________________ 29
Safety instructions ____________________________________ 29
Measuring flow rate (1) ________________________________ 30
Measuring flow rate (2) ________________________________ 31
Checking for leaks and pump pressure (1) _________________ 32
Checking for leaks and pump pressure (2) _________________ 33
Measuring coffee temperature___________________________ 34
Protective earth continuity test (1) ________________________ 35
Protective earth continuity test (2) ________________________ 36
Protective insulation test (1) ____________________________ 37
Protective insulation test (2) ____________________________ 38
Protective insulation test (3) ____________________________ 39
Maintenance________________________________________ 40
Descaling (1) ________________________________________ 40
Descaling (2) ________________________________________ 41
Spare Parts _________________________________________ 42
Repair accessories ___________________________________ 42
Spare parts EF 347 / C99 ______________________________ 43
Spare parts EF 348 / D99 ______________________________ 46
Page 3
3
Service Manual EF 347 / EF 348 enVersion 1.0
Preface
General
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 347 and EF 348.
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.
Nespresso technical website
Visit the Nespresso technical website periodically to check for upgrades, technical modifications, counter measures etc. for this coffee
machine: https://business.nespresso.com
Access is restricted and can be
obtained by asking your Nespresso
technical contact person.
Please keep this manual together with the
corresponding service documentation. This
way you are assured to have the necessary
information.
Content updates
The version number of this service
manual is printed on the lower right
corner of the page.
Version 1.0
First released service manual version.
Page 4
4
Service Manual EF 347 / EF 348 enVersion 1.0
General Safety Notes
Risk of fatal electrical shock and fire!
Mains voltage inside the coffee
machine.
• Unplug appliance before cleaning.
• Never clean wet or immerse plug,
cord or appliance in any fluid.
• Disconnect the mains plug before
disassembly - the appliance must be
free of voltage.
As an additional safety measure, the use of a
residual current device (RCD), also called a
ground fault circuit interrupter (GFCI), in the
repair centre is highly recommended.
This device does not protect against
electrical shock due to contact with
both circuit conductors.
Use a GFCI with a trip level of 4 - 6 mA
(USA) resp. a RCD with a trip level of
15 - 30 mA (Europe). A trip level
above 30 mA provides only very
limited protection against harm from
an electric shock.
Danger of burns!
Hot parts and water under pressure
inside the coffee machine (particularly in the thermoblock).
• Let coffee machine cool down before
cleaning or disassembly.
Example illustrations of typical devices:
1) RCD protected socket-outlet
2) Plug-in RCD unit
3) GFCI socket
4) Plug-in GFCI
1
2
RESET
TEST
RESET
TEST
3
4
Page 5
5
Service Manual EF 347 / EF 348 enVersion 1.0
Main Components
Overview
1) Closing handle
2) Cover
3) Compact brewing unit (TCBU)
4) Capsule inlet
5) Side panel
6) Espresso button, back lighted
7) Coffee outlet
8) Lungo button, back lighted
9) Container for used capsules
10) Drip grid
11) Drip tray
12) Lower chassis
13) Thermoblock
14) Electronic control board
15) Pump
16) Upper chassis
17) Water tank
10
1
2
9
11
3
4
12
8
5
13
7
17
14
15
16
6
Page 6
6
Main Components
Service Manual EF 347 / EF 348 enVersion 1.0
Overview of rating plates
The rating plate can be found at the underside
of the coffee machine. It is of varying design
depending on the brand and carries the
following information:
1. Brand name
2. Voltage and power rating
3. Manufacturing country
4. Conformity with RoHS guidelines
5. Bar code
6. Serial number
7. Machine type
8. Special disposal icon
9. Sign of conformity (CE)
10. Article number of the rating plate
Serial number codification
Example: 121 243 47Q 1234 782 1Ke
12124
production date: 124th day of year 2012
347 machine type (EF no.)
Q production site
1234 incremental number per production day
7 machine partner codification
8voltage
2 mains plug version
1K colour version
e checksum number
1
2
3
5
6
7
8
4
9
10
Page 7
7
Main Components
Service Manual EF 347 / EF 348 enVersion 1.0
Rating Plates Essenza machine partners
Page 8
8
Main Components
Service Manual EF 347 / EF 348 enVersion 1.0
Water circuit
1) Water tank
2) Water tank valve and connector
3) Pump
4) Thermoblock
5) Flowmeter
6) Coffee outlet
7) Compact brewing unit (TCBU)
7
6
4
3
1
5
2
Page 9
9
Service Manual EF 347 / EF 348 enVersion 1.0
Technical Data
Mains
EUR 230V / 50 Hz
USA / CAN 120V / 60 Hz
Approvals SEV, CENELEC, CE-conform
UL, CUL, MITI
Cable length approx. 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
220 V / 240 V 1’260 W
Energy consumption
(CECED / FEA 2009 method)
Energy efficiency class level A - 40%
Daily energy consumption 63.8 Wh
Annual energy consumption 23.3 kWh
Various data
Pre-heating time approx. ~25 sec.
Storage temperature -25° C up to 60° C
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
254 mm
291 mm
260mm
166 mm
254mm
291 mm
260mm
EF 347
EF 348
Page 10
10
Service Manual EF 347 / EF 348 enVersion 1.0
Operation
Making coffee
1. Rinse then fill the water tank with potable
water.
2. a) Press the Espresso or Lungo button to
activate the machine.
b) Blinking Lights: heating up (25 sec).
Steady Lights: ready.
Never lift lever during operation and
refer to the safety precautions to
avoid possible harm when operating
the appliance.
During heat up, you can press either
coffee button while blinking. The
coffee will then flow automatically
when the machine is ready.
3. Lift the lever completely and insert a
Nespresso capsule.
4. Close the lever and place a cup under the
coffee outlet.
5. Press the Espresso (40 ml) or the Lungo
(110 ml) button to start. Preparation will
stop automatically. To stop the coffee flow
or top up your coffee, press again.
6. Remove the cup. Lift and close the lever
to eject the capsule into the used capsule
container.
1
3
4
b
a
2
6
5
Page 11
11
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Programming the water system
1. Turn the machine on and wait for it to be
in ready mode (steady lights).
2. Fill the water tank with potable water and
insert a Nespresso capsule.
3. Place a cup under the coffee outlet.
4. Press and hold the Espresso or Lungo
button.
5. Release button once the desired volume
is served.
6. Water volume level is now stored.
1
3
2
4
Page 12
12
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Emptying the water system
The machine will be blocked for
10 minutes after emptying mode.
1. To enter the emptying mode, press both
the Espresso and Lungo button to turn the
machine off.
2. Remove the water tank and open the
lever.
3. Press both the Espresso and Lungo
button for 3 seconds.
a) Both LEDs blink alternatively.
4. Close the lever.
5. Machine switches off automatically.
6. Empty and clean the used capsule
container and drip tray.
1
a
3
2
4
Page 13
13
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Energy saving mode
This machine is equipped with an
energy saving feature. The machine
will automatically enter power off
mode after 9 minutes.
1. To turn the machine on either press the
Espresso or Lungo button.
2. To turn the machine off before automatic
Power Off mode, press both the Espresso
and Lungo button simultaneously.
To change this setting
3. With machine being turned off, press and
hold the Espresso button for 3 seconds.
4. The Espresso button will blink to indicate
the current setting.
5. To change this setting press the Espresso
button:
One time for power off mode after
9 minutes
One more time for power off mode after
30 minutes
One more time to deactivate
6. To exit the energy saving mode press the
Lungo button for 3 seconds.
1
3
5
2
4
6
Page 14
14
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Reset to factory settings
1. With machine being turned off, press and
hold down the Lungo button for
5 seconds.
2. LEDS will blink fast 3 times to confirm
machine has been reset to factory
settings.
3. LEDs will then continue to blink normally,
as heating up, until ready. Steady lights:
machine ready
Factory settings:
Espresso Cup: 40 ml
Lungo cup: 110 ml
Power off mode: 9 min.
1
3
3x
2
Page 15
15
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Coffee machine status (1)
After pressing the On/Off button, 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 mode Small cup
Led
signal
Big cup
LED
signal
Off off off
Ready on on
Error
blinking fast 3 times
every 2 sec.
blinking fast 3 times
every 2 sec
Heat up Blinking slow Blinking slow
Brewing small cup
Brewing big cup
Blinking slow
on
on
Blinking slow
Rinse small cup
Rinse big cup
Blinking slow
on
on
Blinking slow
Page 16
16
Operation
Service Manual EF 347 / EF 348 enVersion 1.0
Coffee machine status (2)
(
1
H
z
Operating mode Small cup
Led
signal
Big cup
LED
signal
Power off Program
Blinking small cup
- 1x for 9 min.
(factory setting)
- 2 x for 30 min.
- 3 x for deactivated
off
Emptying
Blinking fast
off
off
Blinking fast
Descaling ready
D. pump on descal)
D. pump off (descal)
Blinking fast Blinking fast
Overheat Blinking slow Blinking slow
Order small cup
(during heat)
Blinking slow off
Order big cup (during heat) off Blinking slow
No more stand by
No more power save
--
Resetting to factory Blinking 3 Hz Blinking 3 Hz
Page 17
17
Service Manual EF 347 / EF 348 enVersion 1.0
Troubleshooting
Check 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 closing handle screws at defined
torque or replace CBU (see page 26)
NO - Replace the CBU
2.2 Is the capsule correctly ejected?
YES - Go to point 3
NO - Replace TCBU
3 Fill water tank 3.1 Water tank is leaking
YES - Replace water tank
NO - Go to point 4
Page 18
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Troubleshooting
Service Manual EF 347 / EF 348 enVersion 1.0
4 Press any button to start coffee
machine 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 - c) Check if pump is working (press coffee
button)
YES - Go to point f)
NO - Go to point d)
YES - d) Check if coffee button is functional
YES - Go to point e)
NO - Replace it
YES - e) Check if pump's thermal fuse (128°C) is
defective
YES - Replace pump (see page 24)
NO - Go to point f)
YES - f) Check if thermoblock’s thermal fuse (167°C)
is defective
YES - Replace thermal fuse and if necessary
thermoblock too (see page 23)
NO - Go to point g)
YES - g) Check if electrical wires are functional
YES - Replace elect. mainboard and the NTC
(see page 25)
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 functional
YES - Replace NTC (see page 22)
NO - Replace thermoblock (see page 23)
NO - Self test ok. Go to point 5
5 Check coffee temperature while
preparing a coffee (see page 34)
5.1 No coffee at outlet
YES - a) Water system is empty
YES - Fill water system (see page 11)
NO - Go to point b)
YES - b) Pyramid plate is clogged
YES - Replace TCBU (see page 26)
NO - Go to point c)
YES - c) Machine is blocked by scale YES - Descale machine (see page 40)
NO - Go to point 5.2
5.2 Temperature is too low (less than 83°C)
YES - Descale the machine (see page 40)
NO - Go to point 5.3
5.3 Temperature is too high (more than 89°C)
YES - Change NTC (see page 22)
NO - Go to point 6
Check procedure Symptoms Action / repair work Further action / repair work
Page 19
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Troubleshooting
Service Manual EF 347 / EF 348 enVersion 1.0
6 Check for leaks and check flow
rate (see pages 28 and following)
6.1 Leakage at extraction system
YES - Replace TCBU (see page 26)
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 40)
NO - Replace pump
7 Descaling process (if needed) 7.1 Machine scaled
YES - Descale machine (see page 40)
NO - Go to point 8
8 Final cleaning
End of check procedure
Check procedure Symptoms Action / repair work Further action / repair work
Page 20
20
Service Manual EF 347 / EF 348 enVersion 1.0
Repair
Safety instructions
Risk of fatal electrical shock!
Mains voltage inside the coffee
machine.
Disconnect the mains plug before
disassembly - the coffee machine
must be free of voltage.
Danger of burns!
Hot parts and water under pressure
inside the coffee machine (thermoblock in particular).
Let coffee machine cool down before
disassembly.
Page 21
21
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
General disassembly
Tool:
- Oval screwdriver
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 42).
4. Remove 6 screws (2) on the bottom of the
machine.
5. Swing out and remove both side panels (5).
6. Remove lower chassis (22).
5
5
33
6 + 7 + 8
2
2
22
Page 22
22
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Replacing NTC
Tools:
- Torx screwdriver Pin-TX10
- Open-ended spanner 9 mm AF
- Torque wrench
Procedure:
1. Follow general disassembly (see page
21).
2. Unplug NTC connector from electronic
control board (A).
3. Unscrew 3 screws (23) from thermobloc
cover.
4. Unscrew the screw fixing the cover to the
thermobloc and remove the cover.
5. Remove defective NTC temperature
sensor (43) from thermoblock (40) and
replace it with a new one.
6. Assemble in reverse sequence.
Re-use spring lock washer (42)
and tighten new NTC temperature
sensor (43) with torque wrench
(80 - 100 Ncm).
43
40
42
A
23
23
23
Page 23
23
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Replacing thermoblock
Tools:
- Torx screwdrivers Pin-TX10, TX20
- Open-ended spanner 9 mm AF
- Torque wrench
Procedure:
1. Follow general disassembly (see page 21).
2.
Remove 3 screws (23) and separate thermoblock assembly from upper chassis (1).
3. Unplug NTC connector from electronic
control board (28).
4. Remove clips (D) and 2 hose connectors
(B + C) from thermoblock.
5. Remove ground wire and electrical
connections from thermoblock.
6. Replace thermoblock (40)
7. Mount a new NTC temperature sensor
(43) on the thermoblock (40).
8. Assemble in reverse sequence.
Use a torque wrench (80 - 100 Ncm)
to tighten NTC temperature sensor
(43) with spring lock washer (42).
40*
23
40*
40*
A
43
28
D
B
40*
1
* (complete thermoblock group)
Page 24
24
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Replacing pump
Tools:
- Torx screwdriver Pin-TX10
- Long-nose pliers
- Blade screwdriver, no. 7
Procedure:
1. Follow general disassembly (see page
21).
2. Remove clip (14) and O-ring (15).
3. Remove pump (17).
4. Remove electrical connections from
pump.
5. Replace defective pump (17).
6. Plug in electrical connections on pump.
Check for correct wiring of pump.
7. Insert new O-ring (15).
8. Mount angled hose (26) with clip (14).
14
17
26
T 128°C
L
15
Page 25
25
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Replacing electronic control board
with button prints
Tools:
- Torx screwdriver Pin-TX10
The service engineer must be
earthed using an earthing strap!
Only touch button prints with dedicated gloves to avoid oxydation.
Procedure:
1. Follow general disassembly (see page
21).
2. Remove 2 screws (55) and remove
housing (A) from electronic control board.
3. Unplug NTC and flowmeter and all wires
from electronic control board (28).
4. Remove the 2 screws (23) from cover
(35), open the lever (37) and lift up lightly
the front part of the cover so the buttons
prints wires can pass.
5. Replace defect electronic control (B)
board with button prints (B).
6. Assemble in reverse sequence.
Check for correct wiring of electronic
control board (see page 27).
28
55
A
37
35
23
A
B
Page 26
26
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Replacing compact brewing unit
Tools:
- Torx screwdriver Pin-TX10
- Blade screwdriver no. 4
- 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 42).
3. Remove 4 screws (2) on the bottom of the
machine. Swing out and remove both side
panels (5).
4. Remove 2 screws (36) and pull off closing
handle (37).
5. Remove 2 screws (23) at the front and 1
screw (44) at the back to detach cover
(35).
C99 machine: All screws have the
same lenght.
D99 machine: The screw at the back
is longer than those at the front.
6. Remove clip (14) and hose (32) with Oring (15) from compact brewing unit.
7.
Unlatch coffee outlet (3) from compact
brewing unit (34) with a blade screwdriver.
Take care not to damaged the ring, otherwise replace it
8. Remove 4 screws (24) and detach
compact brewing unit (34).
Tighten closing handle screws (21)
with a torque of 230 - 270 Ncm.
34
36
36
3
32
24
35
37
23
15
14
44
2
5
Page 27
27
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Wiring diagram 220V - 240V IEC
Page 28
28
Repair
Service Manual EF 347 / EF 348 enVersion 1.0
Wiring diagram 120V - 127V IEC
Page 29
29
Service Manual EF 347 / EF 348 enVersion 1.0
Function Tests
Safety instructions
Some function tests are performed with an
energized, partly opened coffee machine.
Danger of electrocution!
Mains voltage inside the coffee
machine. Do not touch any live part
while performing tests.
Danger of burns!
Hot parts and water under pressure
inside the coffee machine. Do not
touch any hot parts while checking
for leakages! Always wear protective
goggles.
Required equipment
Pos. Component
1
Pressure gauge (EFR no. 16195)
2
Essenza pressure gauge adapter (for part
number refer to EF webshop)
3
Electronic thermometer (or digital multimeter
suitable for temperature measurement)
4
Time r
5
Measuring beaker
6
Test equipment for protective earth continuity
test and protective insulation test
T2
T1
RANGE
-200°C - 1370°C
-328°F - 2498°F
1
REL
HOLD
T1 T2
T1
←
T2
°C/°F
MAX MIN
1
5
4
6
3
MEASURE
LOCK/STOP
COMP
LIGHT
0Ω ADJ
2
Page 30
30
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Measuring flow rate (1)
Procedure:
1. Fill and insert water tank.
2. Open closing handle.
3. Insert connecting unit of pressure adapter
into capsule bay.
4. Push back sealing cone into capsule
cage.
5. Insert fixation unit of pressure adapter into
capsule bay.
6. Press down operating lever.
Continued on next page.
3
1
2
6
Page 31
31
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Measuring flow rate (2)
Procedure (continued):
7. Connect pressure hose to pressure tester.
8. Position measuring beaker underneath
exit tube of pressure tester.
9. Switch on machine.
10. Press coffee button after heating-up.
11. Open valve fully till water begins to flow.
12. Close valve slowly 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.
13. Perform measurement for approx. 30 sec.
14. There must be at least 60 - 120 ml water
in 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.
8
7
1
0
9
30 sec
13
12
1
4
11
Page 32
32
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Checking for leaks and pump pressure (1)
The following components are checked for
leaks:
- Compact brewing unit (TCBU)
- Hose connections
- Thermoblock
-Pump
Preparation (unplug machine from mains):
1. Remove right side panel.
2. Open closing handle.
3. Insert connecting and fixation unit of pressure adapter into capsule bay (refer to
page 30).
4. Press down operating lever.
5. Position pot underneath exit tube of pressure plug.
6. Fill and insert water tank.
7. Connect mains cable.
Dangerous voltage inside coffee
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.
1
3
2
5
4
6
7
Page 33
33
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Checking for leaks and pump pressure (2)
Procedure (continued):
8. Press any button to start the coffee
machine. Press coffee button after
heating-up.
9. Open valve and leave water to run out for
approx. 10 sec.
10. 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
the temperature increase.
If the pressure exceeds 23 bar, the
machine has to be switched off and
pressure released through the pressure valve.
11. Perform visual and acoustic checks on all
pressurized connections.
The pump must not be in operation
for longer than 50 sec. without water
flow.
12. Open valve to empty pressure gauge.
8
8
11
10 sec
9
10
12
13
Page 34
34
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Measuring coffee temperature
Procedure:
1. Press any button for start the coffee
machine.
2. Position measuring beaker underneath
coffee outlet.
3. After warming up, press coffee button.
4. Preheat coffee outlet for 10 sec. with hot
water.
5. Empty measuring beaker.
6. Insert a capsule (Cosi is the most suitable).
7. Press coffee button.
8. Wait until 20 ml coffee has flown in the
measuring beaker.
9. 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).
1
2
6
5
10 sec
3
4
9
7
8
Page 35
35
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective earth continuity test (1)
What coffee machine model has to be tested and when?
This test is necessary
- for class 1 equipment (three-wire power
cord with protective earth)
- after a repair whenever the housing was
opened and for example a general disassembly was performed.
Therefore all coffee machine models have to
be tested after opening the housing, except
country-specific models without a protective
earth connection.
General
Legal regulation
In case of a repair/modification of the coffee
machine, the repair centre is bound by law to
protect the user/consumer by
- restoring the regular condition of the appliance and
- performing the respective tests according
to EN/IEC 60335-1 “Safety of household
and similar electrical appliances” and
national regulations (e.g. DIN VDE 0701).
Description
Protective earth continuity measurements are
made between the protective earth terminal of
the power plug and
- the thermoblock,
- all conductive, touchable parts of the coffee
machine where dangerous voltage could
occur if the basic insulation was to fail.
This test assures that
- the ground (earth) connection does not
have an interruption between the power
plug and the thermoblock
- the permissible ground resistance is less
than 0.3 Ohms (with a test current of
200 mA DC).
Test equipment
Special test equipment is needed that
complies with the regulations to perform
protective earth continuity measurements.
Detailed requirements and tolerances must be
verified by your local authorities or measurement supplier in any case.
Tes t repo rt
For legal reasons a repair or test report should
be prepared and filed with following information
- customer (name, address)
- type and serial number of coffee machine
- date of repair/test(s)
- performed test(s)/measuring value(s)
- used test equipment
- signature
Test sequence
Danger of electrocution!
Do not plug in the coffee machine
during the protective earth continuity test.
Read and observe safety instructions in user manual of test equipment.
This test sequence is not applicable
for coffee machines with two-wire
power cords (without ground pin).
Continued on next page.
Page 36
36
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective earth continuity test (2)
Test sequence (continued):
1. Connect black measuring cable to ground
pin of power plug with an alligator clip
(example shown: Swiss power plug).
2. Switch on test equipment and select
protective earth continuity test.
Symbolic illustration of test equipment.
3. Touch thermoblock tube with tip of red test
probe.
4. Press "measure" button and read off
displayed resistance.
The resistance must be lower than
0.3 Ohm.
5. Fill in measured value in a test report.
Proceed with protective insulation
test before reassembling the
housing of the coffee machine.
What to do if the protective earth continuity
test fails
Check ground wire connection on thermoblock
(refer to wiring diagrams on page 27).
1
MEASURE
LOCK/STOP
COMP
LIGHT
0Ω ADJ
0.215 Ohm
Test passed
3
4
MEASURE
LOCK/STOP
COMP
LIGHT
0Ω ADJ
2
Page 37
37
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective insulation test (1)
Perform the protective earth continuity test at first, if it is mandatory.
What is the protective insulation test
about?
This test is necessary
- for class 1 and 2 equipment (with/without
protective earth),
- after a repair whenever the housing was
opened and for example a general disassembly was performed.
General
Legal regulation
In case of a repair/modification of the coffee
machine, the repair centre is bound by law to
protect the user/consumer by
- restoring the regular condition of the appliance and
- performing the respective tests according
to EN/IEC 60335-1 “Safety of household
and similar electrical appliances” and
national regulations (e.g. DIN VDE 0701).
Description
The insulation test
- assures that wiring and insulation of the
coffee machine fullfill the normative
requirements after a repair,
- rates the insulation capability of the coffee
machine,
- is a very dangerous test because of a high
test voltage (500 V DC).
For the insulation test, phase and neutral wire
are shunted at the power plug. Then a test
voltage is applied between phase/neutral and
selected parts of the coffee machine.
Test equipment
Special test equipment is needed that complies
with the regulations to perform insulation and
withstanding voltage tests. Detailed requirements and tolerances must be verified with
your local authorities or measurement supplier
in any case.
Ideally the test equipment has a national
power socket for testing, so that the coffee
machine can plugged in directly. Otherwise a
special shunt is necessary to connect the
phase and neutral pin of the coffee machine’s
power plug.
Tes t repo rt
For legal reasons a repair or test report should
be prepared and filed with following information
- customer (name, address)
- type and serial number of coffee machine
- date of repair/test(s)
- performed test(s)/measuring value(s), test
points
- used test equipment
- signature
Test sequence
Danger of electrical shock/short
circuit!
• Do not plug in the coffee machine
during insulation test.
Danger of electrical shock!
• Do not touch tip of test probes.
• Do not touch metallic parts of coffee
machine during test.
•
Read and observe safety instructions
in user manual of test equipment.
Continued on next page.
Page 38
38
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective insulation test (2)
Test sequence (continued):
1. Connect the phase and neutral pin of the
power plug together with a test adapter
(procured by the repair centre).
A Swiss power plug is shown here as
an example.
2. Connect the black measuring cable to the
test adapter (see image).
Use a short circuit plug or special
alligator clips etc. as substitute for
this test adapter.
3. Switch on test equipment and select an
insulation test voltage of 500 V DC.
Symbolic illustration of test equipment.
Continued on next page.
1
2
MEASURE
LOCK/STOP
COMP
LIGHT
0Ω ADJ
3
Page 39
39
Function Tests
Service Manual EF 347 / EF 348 enVersion 1.0
Protective insulation test (3)
Test sequence (continued):
4. Touch closing handle screw with red test
probe.
Do not scratch surface of closing
handle with probe tip.
5. Press "measure" button.
6. Read off displayed insulation resistance
or test result.
The insulation resistance must be
higher than 300 kOhm (300,000 Ohm).
7. Fill in measured value in a test report.
8. Switch off test equipment.
9. Short red with black test probe to make
sure that test voltage is discharged.
What to do if the insulation test fails
Risk of damage!
A sparkover can damage the electronic control board and sensors etc.
Assume that the coffee machine is defect after
a failed insulation test.
Check wiring and locate fault.
After fault clearance proceed with trouble-
shooting check list (see page 16).
Test passed
7
8
Page 40
40
Service Manual EF 347 / EF 348 enVersion 1.0
Maintenance
Descaling (1)
Only use Nespresso decalcifier!
Decalcifier is aggressive to surfaces.
Immediately clean drops of
descaling solution.
This machine is equipped with a
descaling alarm (both LEDs blink
during ready mode).
Descaling duration:
approx. 15 minutes.
Carefully read safety instructions on
decalcifier package.
1. Remove the capsule and close the lever.
2. Empty the drip tray and used capsule
container.
3. Fill the water tank with 0.5 L of potable
water and add 1 Nespresso descaling
liquid.
2
3
1
Page 41
41
Maintenance
Service Manual EF 347 / EF 348 enVersion 1.0
Descaling (2)
Procedure (continued):
4. Place a container (min. volume 1 l) under
the coffee outlet.
5. To enter the descaling mode, while the
machine is turned on, press both the
Espresso and Lungo button for 3
seconds.
6. Both LEDs blink.
7. Press the Lungo button and wait until the
water tank is empty.
8. Refill the water tank with the used
descaling solution collected in the
container and repeat step 4 and 6.
9. Empty and rinse the water tank. Fill with
potable water.
When ready, repeat step 4 and 6 to now
rinse the machine.
10. To exit the descaling mode, press both the
Epresso and Lungo button for 3 seconds.
11. The machine is now ready for use.
4
5
6
7
8
9
10
Page 42
42
Service Manual EF 347 / EF 348 enVersion 1.0
Spare Parts
Repair accessories
* Repair accessories only available at
Nespresso. Please ask your Nespresso
technical contact person.
Manometer and pressure adapter are available at Eugster Frismag AG.
Pos. EFR No. Component
1*
Repairing/service holder device
(for C99 or D99)
2 42213 Manometer
3 60460 Pressure adapter G4
4 0004872 Screwdriver
5 0004878 Oval bit
- 64373 Spare part seal G4
2
3
4
5
1
Page 43
43
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
Spare parts EF 347 / C99
Page 44
44
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
Draw. No. Art. Nr. Part Description
001 0077828 Holder 473 black V3
002 0024863 Screw safety KST/PT 3.0x12 bl galvan oval head (SFS-Remform)
003 0079793 Outlet
005 0075782 Side wall 347 taupe earth high gl.
006 0059106 Capsule container
007 0077819 Drip grid 347 black V2
008 0075915 Drip tray
009 0005238 Hose silic 05.0x2.00mm meter ware, 70 Shore, transp (di/W)
010 0042592 Valve lifter 704 cpl mount.
011 0077824 Pump holder 470 black V3
012 0039196 Pump holder 470 black 60 sh D=00,0mm, 2 fix holes 0,0mm
013 0037384 Clip D=5mm browned inox
014 0005470 Clip D=4mm L=14mm Inox
015 0061701 O-Ring 03.40x1.90 EPDM V3 70 Shore black
016 0060761 Fluid connect elbow 90° black, 16.0x16.0mm crosspiece
017 0069200 Pump SAP.HP4.V04 230-240V/50Hz
018 0077573 Hose FEP D=4.0/2.50x115mm 2 clamp rings/2 tubul. rivets
021 0013299 Rubber feet 9.0x 0.8mm white SJ-5832
022 0077833 Base 470 black
023 0071635 Screw KST/PT 3.0x12 bl galvan rd head Torx-10
024 0045182 Strain relief clamp 966 transp,screwable
025 0075931 Line cord EU SF-71 H05VV-F3G0.75/L80/N180/PE40, assembled
026 0063089 Fluid connect elbow 90° V2 black, 1xF, 1xmale, crosspiece
027 0063049 Fluid connect V shape 55° V3 black, 2xF
028 0079586 Spare electronic 347 230V
029 0048034 Push-button 471 coffee V2 silic translucent
Page 45
45
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
030 0048033 Push-button 474 Espresso V2 silic translucent
032 0079584 Spare hose FEP D4/2.5x230 clamp ring/tubul. rivet/Serto mount.
033 0060988 Water tank
034 0065019 Spare extract unit 473 cpl. TCBU, packed
035 0077829 Hood 473 black V2 gravure: Nespresso capsules only
036 0076213 Screw KST/PT 4.0x16 blk galvan rd head Torx-20
037 0075784 Lock rod 347
040 0079581 Thermobl 2010/L 230V/1200W EF347 cpl V2
041 0043202 Insul. leeve Elbow connect black, FH6,3 US
042 0044585 Spring ring M 5 bl galvan
043 0064816 Temperature gauge 710 cpl NTC 104M5-S160A2
044 0071635 Screw KST/PT 3.0x12 bl galvan rd head Torx-10
046 0043073 Molded tube 473 silic neutral, flow meter pump
047 0067795 Flow meter FHKSC 12 0° 932-9521/A, double insulated
050 0077832 Cover 470 main switch V3 black
051 0075917 Thermost TB02-B-B8D-105 strd wires 95/150mm, 1xFHL6,3x0,8/1xFHL4,8x0,8
053 0079126 Damping element 347 thermobl black, 60 Shore
054 0079698 Pump holder 348 cpl
055 0071635 Screw KST/PT 3.0x12 bl galvan rd head Torx-10
056 0024374 O-Ring 003,40x1.90 silic/2-K 70 Shore red 2-comp silic
982 0078156 Polystyr. 347 2-part.
983 0050083 Covering box 475 slotted V2 449x339x321mm
992 0047595 Supplement ventilation 12-lang.
Draw. No. Art. Nr. Part Description
Page 46
46
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
Spare parts EF 348 / D99
Page 47
47
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
Draw. No. Art. Nr. Part Description
001 0077856 Holder 474 black V3
002 0024863 Screw safety KST/PT 3.0x12 bl galvan oval head (SFS-Remform)
003 0079587 Outlet 347 TCBU cpl black
005 0075783 Side wall 348 white sand high gl.
006 0059105 Caps contain 471 V2 black
007 0077854 Drip grid 348 black V2
008 0077855 Drip tray 471 black V3
009 0005238 Hose silic 05.0x2.00mm meter ware, 70 Shore, transp (di/W)
010 0042592 Valve lifter 704 cpl mount.
011 0077824 Pump holder 470 black V3
012 0039196 Pump holder 470 black 60 sh D=00.0mm, 2 fix holes 0.0mm
013 0037384 Clip D=5mm browned inox
014 0005470 Clip D=4mm L=14mm Inox
015 0061701 O-Ring 03.40x1.90 EPDM V3 70 Shore black
016 0060761 Fluid connect elbow 90° black, 16.0x16.0mm crosspiece
017 0069200 Pump SAP.HP4.V04 230-240V/50Hz
018 0077573 Hose FEP D=4.0/2,50x115mm 2 clamp rings/2 tubul. rivets
021 0013299 Rubber feet 9.0x0.8mm white SJ-5832
022 0077831 Base 471 black V4
023 0071635 Screw KST/PT 3.0x12 bl galvan rd head Torx-10
024 0045182 Strain relief clamp 966 transp, screwable
025 0075931 Line cord EU SF-71 H05VV-F3G0,75/L80/N180/PE40, assembled
026 0063089 Fluid connect elbow 90° V2 black, 1xF, 1xmale, crosspiece
027 0063049 Fluid connect V shape 55° V3 black, 2xF
028 0079586 Spare electronic 347 230V
029 0048034 Push-button 471 coffee V2 silic translucent
Page 48
48
Spare Parts
Service Manual EF 347 / EF 348 enVersion 1.0
030 0048033 Push-button 474 Espresso V2 silic translucent
032 0079584 Spare hose FEP D=4/2.5x230 clamp ring/tubul. rivet/ Serto mount.
033 0060991 Water tank 471 cpl transp V2
034 0079580 Spare extract unit 473 cpl TCBU
035 0077851 Hood 474 black V2 gravure: Nespresso capsules only
036 0076213 Screw KST/PT 4.0x16 blk galvan rd head Torx-20
037 0075784 Lock rod 347
040 0079581 Thermobl 2010/L 230V/1200W EF347 cpl V2
041 0043202 Insul. leeve Elbow connect black, FH6,3 US
042 0044585 Spring ring M 5 bl galvan
043 0064816 Temperature gauge 710 cpl NTC104M5-S160A2
044 0018904 Screw KST/PT 3.0x16 bl galvan rd head Torx-10 CA point
046 0043073 Molded tube 473 silic neutral, flow meter pump
047 0067795 Flow meter FHKSC 12 0° 932-9521/A, double insulated
050 0077832 Cover 470 main switch V3 black
051 0075917 Thermost TB02-B-B8D-105 strd wires 95/150mm, 1xFHL6,3x0,8/1xFHL4,8x0,8
053 0079126 Damping element 347 thermobl black, 60 Shore
054 0079698 Pump holder 348 cpl
055 0071635 Screw KST/PT 3.0x12 bl galvan rd head Torx-10
056 0024374 O-Ring 03.40x1.90 silic/2-K 70 Shore red 2-comp silic
981 0077354 Picture carton 348 Nespresso D 99.331x215x314mm
982 0078157 Polystyr. 348 2-part.
983 0050083 Covering box 475 slotted V2 449x339x321mm
990 0077040 Instr. man. 348 Nespresso
Essenza, 9-lang.NO/SW/DA/FI/GR/arabic/TR/FR/GB,
Zone 2
992 0047595 Supplement ventilation 12-lang.
Draw. No. Art. Nr. Part Description
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