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Nespresso EF 474 manual

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Table of contents for the manual

  • Page 1

    en Service Manual Coffee Machine EF 473 EF 474 Essenza FS[...]

  • Page 2

    2 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Content s Preface _______________________ ______ 3 Main Component s __________________ 4 Overview _____________________ ______ 4 Overview of rating plates ______________ 5 W ater circuit ________________________ _ 6 T echnical data _______________________ 7 Operation _____ _____________________[...]

  • Page 3

    3 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Preface The purpose of this Service Manual is to provide the servic e personnel with all necessary information wi th regards to correct handling, maintenance and repair of the cof fee machines EF 473 and EF 474. This manual should be used by the technicians as a valuable aid to guarantee the pe[...]

  • Page 4

    4 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Main Component s Overview 1) Closing handle 2) Cover 3) Compact brewing unit (CBU) 4) Capsule inlet 5) Side panel 6) F low meter 7) Button "small cup", back lighted 8) Coffee outlet 9) Button "large cup", back lighted 10) Container for used cap sules 11 ) D r i p g r i d 12)[...]

  • Page 5

    5 Main Component s Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Overview of rating plates The rating plate - can be found at the under side of the coffee machine, - may be of varying design, depending on the brand, - carries the following information: • M achine type • V olt age and power rating • Approval seal(s) • Dat a matrix •[...]

  • Page 6

    6 Main Component s Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 W ater circuit 1) Water t ank 2) Water t ank va lve and connector 3) F low meter 4) Pump 5) Thermoblock 6) Compact brewing unit (CBU) 7) Coffee outlet 6 7 5 4 2 1 3[...]

  • Page 7

    7 Main Component s Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 T e chnical data Mains EUR 230V / 50 Hz USA /CAN 120 V / 60 Hz JAP 100 V / 50-60 Hz Approvals SEV , CENELE C, CE-conform, UL, CUL, MITI Cable length ~1,5 m Pump dat a Pump pressure - max. permissible 17,5 bar ±1,5 bar - during coffee prep aration 9 -13 bar (depending on brand [...]

  • Page 8

    8 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Operation Prep aration 1. F ill 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). [...]

  • Page 9

    9 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Fill water system If the coffee machi ne 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 "lar[...]

  • Page 10

    10 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 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 st arts and stop s automaticly . 6. In case the cup is goi ng to flow ov[...]

  • Page 11

    11 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Programming The filling amount for co ffee is preset and can be changed with the fo llowing procedure. ) Factory settings: Button "small cup" ...... ..................40ml Button "large cup" ....... ................ 1 10ml 1. Switch on machine. 2. Open closing han[...]

  • Page 12

    12 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Reset to factory settings 1. Switch off machine. 2. Press and hold bu tton "large cup". 3. Switch on machine. 4. Release button. 1 3 4 2[...]

  • Page 13

    13 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Empty water system After operation, residual water rema ins 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[...]

  • Page 14

    14 Operation Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Coffee machine st atus 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 with in 2 minutes. Operating modes and de tected failures are indicated by backlighted co[...]

  • Page 15

    15 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 T roubleshooting Checking the machine on receipt The receipt check enables you to rapidly locate faults on the ma chine and to initiate appropriate repair action. Follow the check procedure. Repair any fault s found and check if the machine is operating perfectly . Check procedur e Symptoms Ac[...]

  • Page 16

    16 T roubleshooting Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 4 Press On/Off button to perform automatic self te st - continued 4.1 Machine is not working (no function) - continued YES - g) Check if electrical wires are functional YES - Replace electr onic mainboard NO - Replace defective(s) wire(s) NO - Go to point 4 .2 4.2 Backlighted [...]

  • Page 17

    17 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Rep air General disassembly T ool: - Oval screwdriver ) Empty water system if necessary (see p age 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 contai ne[...]

  • Page 18

    18 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Replacing thermobl ock and NTC T ools: - Torx screwdrivers T10, T30 - Open-ended spanner 10 mm AF - Torque wrench Procedure: 1. Follow general disassembly (see page 16). 2. Remove screw (2 3) and detach holder (48) with flow meter (47). 3. Remove 3 screws (23) and separate thermoblock [...]

  • Page 19

    19 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Replacing flow meter and On/Of f switch T ools: - Torx screwdriver T10 Procedure for flow meter: 1. Follow general disassembly (see page 16). 2. Remove screw (2 3) and detach holder (48) with flow meter (47). 3. Snap holder (48) from flow meter (47). 4. Unplug connector fr om flow mete[...]

  • Page 20

    20 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Replacing pump T ools: - 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 ang led hose ([...]

  • Page 21

    21 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Replacing electronic control board with button prints T ools: - Torx screwdriver T10  The service engineer must be earthed using an earthing strap! ) Only touch button print s with dedicate d gloves to avoid oxydation. Procedure: 1. Follow general disassembly (see page 16). 2. Detac[...]

  • Page 22

    22 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Replacing comp act brewing unit (CBU) T ools: - 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 contai ner (6). 2. Place machine on[...]

  • Page 23

    23 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Electronic control board, wiri ng 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) F low meter 5) NTC temperature sensor 6) F ine-wire fuse on thermoblock 7) On/Off switch 8) F ine-wire[...]

  • Page 24

    24 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Electronic control board, wiring diagram - USA (UL, 120 V / 60 Hz) 1) Heat sink 2) Print for button "l arge cup" with LED 3) Print for button "sm all cup" with LED 4) Flow meter 5) NTC temperature sensor 6) Fine-wire fuse on thermoblock 7) On/Off switch 8) Fine-wire[...]

  • Page 25

    25 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Electronic control board, wiri ng diagram - Jap an (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) F low meter 5) NTC temperature sensor 6) F ine-wire fuse on thermoblock 7) On/Off switch 8) F ine-[...]

  • Page 26

    26 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Descaling (1)  Only use Nespresso decalcifier - never vinegar! Decalcifier is aggr essive to surfaces. Prep aration: 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 [...]

  • Page 27

    27 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Descaling (2) 10. F ill water tank again with descaling solution from pot. 1 1. Repeat descaling pr ocedure 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 tan[...]

  • Page 28

    28 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Measuring flow rate Procedure: 1. F ill water tank. 2. Insert pressure pl ug in capsule inlet. 3. Press down closing handle lightly till pressure plug fits in cap sule cage. 4. Pull off holding device. The pressure plug clamps it self to the capsule cage. 5. Position measuri ng beaker [...]

  • Page 29

    29 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Checking for leaks and pump pressure (1) The following components are checked for leaks: - Compact brewing unit - Connections - Thermoblock -P u m p Prep aration (unplug ma chine from mains): 1. Remove right side panel (pump is visible). 2. Insert pressure pl ug in capsule inlet. 3. Pr[...]

  • Page 30

    30 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 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. 1 1. Fully close valve. The pressure will rise rapidly initially and stabilise betwe[...]

  • Page 31

    31 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Measuring coffee temperature Procedure: 1. Switch on machine. 2. Position measuri ng beaker underneath coffee outlet. 3. After warming up, press button "large cup" and preheat coffee ou tlet with hot water . 4. Insert a capsule (Cosi is the most suitable). 5. Press a button &[...]

  • Page 32

    32 Rep air Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 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. F ill tank with fresh water . 6. Reassemble coffe machine. 7. Switch on machine. 8. Press a coffe[...]

  • Page 33

    33 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Spar e P a r ts Rep air accessories * Only available through Nespresso. Please call yo ur Nespresso contact. 1 2 0004878 0004872 Pos. EFR nr . Compon ent 1 * Pressure gauge 2 * Repairing/service holder device A (for EF 473) 2 * Repairing/service holder device B (for EF 474) 3 0004872 Special s[...]

  • Page 34

    34 Spar e P a r ts Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Sp are part s EF 473 Pos. EFR nr . Compon ent 1 42 501 Upper chassis EF 473 2 24 863 Safety screw 3,0 x 12 KST/PT 3 40 686 Coffee outlet & front ring EF 470 (package) 5 43 070 Side panel EF 473 titan-Pelikan lacquered 5 43 069 Side panelEF 473 black high finish 6 39 170 Cap[...]

  • Page 35

    35 Spar e P a r ts Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Sp are part s EF 473 (continued) Pos. EFR nr . Compon ent 26 42 572 Angle connection for hoses 28 44 636 Electronic set 23 0V EF 473 28 Electronic set 120V EF 473 28 Electronic set 100V EF 473 29 39 153 "Coffee" button EF 470 30 43 060 "Espresso" button EF 4[...]

  • Page 36

    36 Spar e P a r ts Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Sp are part s EF 474 Pos. EFR nr . Compon ent 1 42 502 Upper chassis EF 474 2 24 863 Safety screw 3,0 x 12 KST/PT 3 40 687 Coffee outlet & front ring EF 471 (package) 5 43 071 Side panel EF 474 platin lacquered 6 39 171 Capsule container EF 471 black 7 39 151 Drip grid EF 4[...]

  • Page 37

    37 Spar e P a r ts Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Sp are part s EF 474 (continued) Pos. EFR nr . Compon ent 26 42572 Angle connection for hoses 28 44636 Electron ic 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[...]

  • Page 38

    38 Service Manual EF 473 / EF 474 en Ve r s i o n 1 . 0 Notes[...]