Nespresso EF 473 Coffeemaker User Manual
Contents
1. 8 Fine wire fuse on pump Flow meter 0 Thermoblock 1a Q Ji On Off switch i UE L N Mains Plug Service Manual EF 473 EF 474 24 Version 1 0 en Repair Electronic control board wiring diagram Japan 100 V 50 60 Hz Electronic Main Board Print large cup Print small cup rei I 2 Print for button large cup with LED AKI 3 Print for button small cup with LED 4 Flow meter 5 NTC temperature sensor 6 Fine wire fuse on thermoblock 7 On Off switch ZA ia 8 Fine wire fuse on pump Flow meter 00 Thermoblock 7 ai On Off switch DE LN Mains Plug Service Manual EF 473 EF 474 2 5 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 driptray 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 descaling fluid and 0 5 water Re insert water tank 6 Switch on machine 7 Press and hold both coffee buttons for at least 3 seconds to start descaling mode2. 48 with flow meter 47 Remove 3 screws 23 and separate thermoblock 40 with support 40 from chassis Remove screw M3 5 x 25 washer and rubber gasket and separate thermoblock 40 from its support Remove screw 38 and separate fine wire fuse 900 from thermoblock Remove electronic housing 28 Unplug NTC connector from electronic control board 28 Remove NTC 43 from thermoblock and replace it if defective Remove clips 13 and hose connectors 16 26 from thermoblock Remove ground wire and electrical connections from thermoblock Replace defective thermoblock Assemble in reverse sequence Service Manual EF 473 EF 474 Use a torque wrench 90 110 Ncm to tighten NTC temperature sensor 43 with spring washer 42 1 8 Version 1 0 en Repair Replacing flow meter and On Off switch Tools Torx screwdriver T10 Procedure for flow meter 1 2 FS Follow general disassembly see page 16 Remove screw 23 and detach holder 48 with flow meter 47 Snap holder 48 from flow meter 47 Unplug connector from flow meter 47 Remove hoses from flow meter 47 and replace it Assemble in reverse sequence Procedure for On Off switch Follow general disassembly see page 16 Remove screw 23 and detach support 49 with On Off switch 50 Remove 2 screws 23 and strain relief 24 of mains
3. fast blinking coffee buttons The temperature of the thermoblock is regulated to 65 C Descaling 8 Press button large cup to start pump 9 Let entire descaling solution pass through coffee outlet Service Manual EF 473 EF 474 Version 1 0 en Repair Descaling 2 10 Fill water tank again with descaling solution from pot 11 Repeat descaling procedure one more time Press button large cup and let entire descaling solution run through Rinsing 12 Empty pot 13 Remove filter from capsule inlet 14 Rinse water tank thoroughly and fill it with fresh water 15 Place poton 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 Version 1 0 en Repair Measuring flow rate Procedure 1 2 di O CON O Fill water tank Insert pressure plug in capsule inlet Press down closing handle lightly till pressure plug fits in capsule cage Pull off holding device The pressure plug clamps itself to t
4. Manual EF 473 EF 474 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 5m 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 91 Drip tray approx 100 ml Capsule container 10 14 pcs N Power consumption at all voltages and frequencies Thermoblock 1200 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 in 1h 11 Wh factory setting Stand by mode Various data Pre heating time approx 50 S Safety temperature thermal cut off 167 C Coffee temperature at outlet 86 Ct3 C approx 3 kg without water Weight of machine Version 1 0 en Operation Preparation 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 AUN ES 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 8 Version 1 0 en Operation Fill water system If the coffee mac
5. Strand wire blue 730mm SSCS 900 43084 900 39630 Strand wire yellowigreen 220mm 7 900 6328 Stand wire white 100mm 900 39263 Stand wire black 100mm Service Manual EF 473 EF 474 3 5 Version 1 0 en Spare Parts Spare parts EF 474 3 46 lez gt pri 12 15 7 19 147 20 21 2 LO 22 2 021 41 Service Manual EF 473 EF 474 Component 1 42502 Upper chassis EF 474 2 24863 Safety screw 3 0 x 12 KST PT 40687 Coffee outlet amp front ring EF 471 package 43071 Side panel EF 474 platin lacquered 39171 Capsule container EF 471 black 39151 Drip grid EF 471 Inox Drip tray EF 474 print Nespresso Essenza Automatic silvery print DeLonghi Nespresso silvery 8 40483 Drip tray EF 474 print Koenig Capri Autom Drip tray EF 474 43214 Nespresso silvery e 40487 Drip ray EF 474 print Magimix Nespresso silvery 9 aos Hose wetertenk pump O o 10 a m 30195 m 5470 a Pewen o o a Poove o 22 Lower chassis EM O 7 SoS S SyS 43215 1 39165 Lower chassis EF 471 22 ns 25 43462 Power Bord UL 25 PowercordJapan igm OO OOO O O OOO 36 Version 1 0 en Spare Parts Spare parts EF 474 continued Pos EFRnr Component 26 Angle connection for hoses T Electronic set 230V EF 473 28 Electronic set 120V EF 473 Electronic set 100V EF 473 29 39154 Coffee buttonEF 471 43061 Espresso button EF 474 26392 Silicon hose 32 39198 Hos
6. cable Press in lockings and slide support 49 backwards Unplug all connectors from On Off switch 50 and replace it Assemble in reverse sequence Check for correct wiring of On Off switch Service Manual EF 473 EF 474 s JS N A N Line _1 1a Line i hi mains Neutral Neutral SL 2a On Off switch 19 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 E gt Check for correct wiring of pump 12 Insert new seal 15 mount hose 18 and clamp 14 11 Attach pump to second rubber strap 13 Mount angled hose 9 Service Manual EF 473 EF 474 2 0 Version 1 0 en Repair Replacing electronic control board with button prints Tools Torx screwdriver T10 The service enginee
7. Measure the coffee temperature approx 5 10 mm below the outlet opening Coffee temperature should be approx 86 C 3 C 187 F 5 4 F Service Manual EF 473 EF 474 Version 1 0 en Repair Daily care and final cleaning Procedure machine is switched off 1 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 CON OD OF W DN Service Manual EF 473 EF 474 Version 1 0 en Spare Parts Repair accessories Pos EFRm _ Component Pressure gauge Repairing service holder device A for EF 473 2 Repairing service holder device B for EF 474 3 0004872 Special screwdriver with oval bit 0004878 Oval bit for screwdriver Only available through Nespresso Please call your Nespresso contact 0004878 I 0004872 Service Manual EF 473 EF 474 3 3 Version 1 0 en Spare Parts Spare parts EF 473 36 A OS FO Le 32 TC di NL 31 iaia U In Usi 1 Ise UA A 40 22 Service Manual EF 473 EF 474 Component 1 42501 Upper chassis EF 473 2 24863 Safety screw 3 0 x 12 KST PT Coffee outlet amp front ring EF 470 package Side panel EF 473 titan Pelikan 5 43069 Side panelEF 473 black 6 39170 Capsuleconta
8. al 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 3 Version 1 0 en 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 Service Manual EF 473 EF 474 Version 1 0 en Main Components Overview of rating plates The rating plate can be found at the underside of the coffee machine may be of varying design depending on the brand carries the following information Machine type Voltage and power rating Approval seal s Data matrix Serial num
9. ary with the thermoblock NO Go to point g Service Manual EF 473 EF 474 1 5 Version 1 0 en Troubleshooting N Check procedure Symptoms Action repair work Further action repair work oo l l l i YES Replace electronic mainboard 4 1 n i working no function YES g Check if electrical wires are functional NO Replace defective s wire s continue 4 Press On Off button to perform NO Go to point 4 2 automatic self test continued l l l YES Check if thermoblock heating element is func YES Replace NTC 4 2 Backlighted coffee button blinks at irregular tional NO Replace thermoblock 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 i YES Clean or replace it YES b Flow meter is clogged NO Go to point c 5 1 No coffee outlet YES c Pyramid plate is clogged ws ci a 5 Check coffee temperature while Go to point d preparing a coffee see page 30 YES d Machine is blocked by scale YES Descale machine see page 25 l o YES Descale the machine see page 25 5 2 Temperature is too low less than 83 C NO Go to point 5 3 R YES Change NTC l YES Replace CBU 6 1 Leakage at extraction system NO Go to point 6 2 6 2 Leakage at tubes connection YES Replace defective tube and seal 6 Check for leaks and check flow NO Go to point 6 3 YES Machine is scaled YES Descale machine see page 25 NO Rep
10. ber Bar code Krups Serial number codification Example 0527 8074 7305 9100 015 05278 production date 278 day of year 2005 07 machine partner codification 473 machine type 05 9 1 voltage mains plug version color version production site 0001 incremental number per production day checksum number Service Manual EF 473 EF 474 NESPRESSO Type C100 220 240V 1260W FEN MADE IN SWITZERLAND 0527 8074 7305 9100 015 Typ KOENIG Capri Automatic 03165 220 240V 1260W 50Hz MADE IN SWITZERLAND KOENIG APPARATE AG Z RICH 05105 CE 0527 8044 7405 2100 015 MADE IN EUROPE DeLonghi Type EN 95 M 220 240V 50 60Hz 1260W E 0527 8014 7405 2100 012 Ser Nr 54013 S300075 MAGIMIX M100 AUTO ref 11244 220 240V 1260W 50Hz Made in Switzerland Fabriqu en Suisse ECE 0527 8064 7405 2100 017 Turmix TX150 TURMIX AG 8645 Jona Switzerland 220 240V 1260W 50Hz MADE IN SWITZERLAND 05105 Fre Q HCE 0527 8084 7305 9100 016 KRU PS TYPE XN 2105 220 240V 1260W 50Hz MADE IN SWITZERLAND 1 XN210540 1M0 4005 0527 8054 7305 4100 017 0043809 0044074 Version 1 0 en Main Components Water circuit 1 Water tank 2 Water tank valve and connector 3 Flow meter 4 Pump 5 Thermoblock 6 Compact brewing unit CBU 7 Coffee outlet Service Manual EF 473 EF 474 6 Version 1 0 en Main Components Technical data Service
11. e appropriate repair action machine is operating perfectly Check procedure Symptoms Action repair work Further action repair work l _ 1 1 Parts of housing broken or damaged ie Repiaca Pau IEneeSsal 1 Check appliance for visible NO Go to point 1 2 damage YES Replace mains cable he Maine Gable Camaged NO Plug machine to the mains and go to point 2 1 YES Screw on new closing handle screws at NO Itis hard or impossible to close the closing handle defined torque see page 22 or replace CBU NO Replace the CBU 2 Check mechanical elements VES Got mE i Go to point 2 2 3 Is the capsule cage seal damaged YES Replace CBU feel with a finger if the seal is damaged NO Go to point 3 l l i YES Wie water tank YES a Check if mains cable is functional O NO Replace it 2 1 Closing handle works correctly 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 YES Go to point f l button NO Go to point d OEA O U AAT PEON 4 1 Machine is not working no function i automatic self test 9 YES Go to point e YES d Check if coffee buttons are functional NO Replace defective button s YES e Check if pump s fine wire fuse 128 C is YES Replace it defective NO Replace pump YES f Check if thermoblock s fine wire fuse 167 C YES Replace it together with electronic control is defective board and if necess
12. e thermoblock CBU 33 39143 Water tank EF 471 Watertankera SSS 39256 21542 0 77 Themobiock complete T20VEF 473 0 Themobiock complete 100 Er 473 SSCS 18904 900 49701 Safety thermostat iene OC SOSS SS 900 43095 Strand wire blue 130mm SSS 900 43004 15 19 14 20 21 2 40 722 Service Manual EF 473 EF 474 3 7 Version 1 0 en Notes Service Manual EF 473 EF 474 3 8 Version 1 0 en
13. en Service Manual Coffee Machine EF 473 EF 474 Essenza FS Contents N Preface 3 Electronic control board wiring diagram USA UL 120 V 60 Hz 24 Main Components 4 Electronic control board wiring diagram Overview 4 Japan 100 V 50 60 Hz ______ 235 Overview of rating plates 5 Descaling ___ 26 Water circuit 6 Descaling 2 __ O_ 27 Technical data 7 Measuring flow rate 28 Checking for leaks and pump Operation 8 pressure 1 29 Preparation 8 Checking for leaks and pump Fill water system 9 pressure 2 OO 30 Making coffee 10 Measuring coffee temperature 31 Programming 11 Daily care and final cleaning 32 Reset to factory settings 12 Spare Parts 33 Empty water system 13 TI ad Coffee machine status 14 Repair accessories __ 33 Spare parts EF 473 34 Troubleshooting 15 Spare parts EF 474 36 Checking the machine on receipt 15 Notes a Repair 17 General disassembly 17 Replacing thermoblock and NTC 18 Replacing flow meter and On Off switch 19 Replacing pump 20 Replacing electronic control board with button prints 21 Replacing compact brewing unit CBU _ 22 Electronic control board wiring diagram Europe 230V 50 Hz 23 Service Manual EF 473 EF 474 2 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 ofthe coffee machines EF 473 and EF 474 This manu
14. from compact brewing unit 34 with a blade screwdriver 8 Remove 4 screws 23 and detach compact brewing unit 34 10 Assemble new compact brewing unit Tj Ti hten new EFR nr 39256 closin 9 Remove clip 14 and hose 32 with o ring together with new coffee outlet 3 in on one 36 with a ri a 15 from compact brewing unit 34 reverse sequence 450 N cm Replace o ring 15 Service Manual EF 473 EF 474 2 2 Version 1 0 en Repair Electronic control board wiring diagram Europe 230V 50 Hz 1 Heat sink 2 Print for button large cup with LED 3 Print for button small cup with LED 4 Flow meter 5 NTC temperature sensor 6 Fine wire fuse on thermoblock 7 On Off switch 8 Fine wire fuse on pump Service Manual EF 473 EF 474 Electronic Main Board Print large cup Print small cup PRIOR Il vn HT KIA Hmm HAT Gt i iQ tal Q T 128 j V On Off switch J na Mains Plug L NPE 23 Version 1 0 en Repair Electronic control board wiring diagram USA UL 120 V 60 Hz 1 Heat sink 2 Print for button large cup with LED 3 Print for button small cup with LED 4 Flow meter 5 NTC temperature sensor 6 Fine wire fuse on thermoblock 7 On Off switch Sean ea Pea eer ee gen
15. he capsule cage Position measuring beaker underneath exit tube of pressure plug Switch on machine Press button large cup after heating up Open valve fully till water begins to flow Close valve until 12 bar are indicated ES The manometer must be observed 10 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 Perform measurement for approx 30 sec 11 There must be at least 60 120 ml water in the measuring beaker Service Manual EF 473 EF 474 Notice With a flow of lt 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 28 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 2 di Remove right side panel pump is visible Insert pressure plug in capsule inlet Press down closing handle lightly till pressure plug fits in capsule cage Pull off holding device The pressure plug clamps itself to the capsule cage Position pot underneath exit tube of pressure plug Fill water tank Connect mains cable Dangerous voltage inside coffee mac
16. hine 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 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 The pump must not be in operation for longer than 50 s without water flow 13 Switch off machine 14 Open valve to empty pressure gauge 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
17. hine cannot pump water although there is water in the tank the water circuit may be empty Procedure to fill water system 1 OO Perform steps 1 to 5 for preparation see page 8 Open closing handle in vertical position Press button large cup Press and hold closing handle to rear end position Observe capsule inlet for appearing water Press down closing handle immediately when first droplets are visible Press button large cup again to stop water flow Service Manual EF 473 EF 474 Version 1 0 en Operation Making coffee 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 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 O DI WON O 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 ES 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 outle
18. ice Manual EF 473 EF 474 N le Lu gt Er le SID Fin ai_ lt _ lt SIR E DI gt SASA ld gt Fb e 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 and detected failures are indicated by backlighted coffee buttons as listed in the following table Operating status of coffee buttons Led off Vy Led on Led blinking slow Led blinking fast Led blinking three times fast Service Manual EF 473 EF 474 te ee Heat up coffee self test Heat up descaling Small coffee rinsing programming Large coffee rinsing programming Descaling ready Pump on off while descaling Emptying water system Stand by Resetting 14 blinking fast Button small cup is blinking slow Button large cup is on Button small cup is on Button large cup is blinking slow blinking fast blinking fast blinking fast blinking three times fast blinking slow left right alternately blinking slow Version 1 0 en Troubleshooting N Checking the machine on receipt The receipt check enables you to rapidly Follow the check procedure locate faults on the machine and to initiate Repair any faults found and check if th
19. inerEF470 Drip grid EF 470 Inox 8 40478 Drip tray EF 470 8 43212 Drip tray EF 473 43211 Drip tray EF 473 43073 Hose water tank pump 10 40691 Water tank connector assembled 39195 Pump attachment lacquered high finish black print Krups Nespresso silvery print Turmix TX150 Nespresso silvery print Nespresso Essenza Automatic silvery 13 37384 Clip D 5mm 16 42570 o BE Pme SSS 71 2 2 22 SSS Hose pump thermoblock 2 Elasicstop DD 13299 Elastic stop 39196 Pump fixation 22 39164 Lower chassis EF 470 Lower chassis Er a0 O O SSS S SyS 25 23946 Power cord UL Tan 2 PowercordJapan 10m O O O OOOO y Version 1 0 en Spare Parts Spare parts EF 473 continued Pos EFRnr Component 26 Angle connection for hoses Electronic set 230V EF 473 28 Electronic set 120V EF 473 Electronic set 100V EF 473 29 39153 Coffee button EF 470 43060 Espresso button EF 473 26392 Silicon hose 32 39198 Hose thermoblock CBU 33 39142 Water tank EF 470 40685 Compact brewing unit CBU 39168 Cover EF 470 36 39256 Screw M4 x 25 Torx 20 39162 Closing handle EF 470 N is 19799 Screw M4 x 8 Torx 20 ais 21542 Thermal cutoff clip gt i 40 44638 Th block lete 230V EF 473 NY 40 ermoblock complete 0 Thermoblock complete 120V Er 473 0 Thermoblock complete 100VEF 473 SSCS a7 50 43068 Main switch 900 43101 Safety thermostat 167 C 900 43095
20. lace pump 6 3 Flow rate out of range RN Dec sania NO No trouble found during the check procedure ae Pasa bn gr nn u further details in order to take decision i YES Descale machine see page 25 7 Descaling process if needed 7 1 Machine scaled NO Go to point 8 8 Final cleaning see page 31 rate see pages 27 28 and 29 End of check procedure Service Manual EF 473 EF 474 1 6 Version 1 0 en 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 ofthe machine 5 Swing out EF 473 or snap out EF 474 and remove both side panels 5 6 Remove lower chassis 22 Ya 47 lt Ar A de Fe Service Manual EF 473 EF 474 1 7 Version 1 0 en Repair Replacing thermoblock and NTC Tools Torx screwdrivers T10 T30 Open ended spanner 10 mm AF Torque wrench Procedure 10 11 12 Follow general disassembly see page 16 Remove screw 23 and detach holder
21. r must be 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 Check for correct wiring of electronic control board see pages 22 23 or 24 Service Manual EF 473 EF 474 21 Version 1 0 en Repair Replacing compact brewing unit CBU Tools Torx screwdrivers T10 T20 Blade screwdriver no 4 Oval screwdriver Long nose pliers Torque wrench Procedure 1 Remove water tank 33 and drip tray 8 together with drip grid 7 and capsule container 6 2 Place machine on the repairing service holder device see page 32 3 Remove 4 screws 2 on the bottom of the machine 4 Swing out EF 473 or snap out EF 474 and remove both side panels 5 5 Remove 2 screws 36 and pull off closing handle 37 6 Remove 2 screws 23 at the front and 1 screw 23 at the back to detach cover 35 7 Unlatch coffee outlet 3
22. t 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 DO PD Service Manual EF 473 EF 474 Version 1 0 en Operation Reset to factory settings 1 Switch off machine 2 Press and hold button large cup 3 Switch on machine 4 Release button Service Manual EF 473 EF 474 Version 1 0 en Operation Empty water system After operation residual water remains in the water circuit This residual water can be removed before a longer period of non use for frost protection before repair and following shipping AUN 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 After this procedure the machine is blocked for approx 10 minutes till thermoblock temperature lt 100 C Serv
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