en Service Manual Coffee Machine EF 473 EF 474 Essenza FS
Contents Preface _____________________________ 3 Main Components __________________ 4 Overview ___________________________ 4 Overview of rating plates ______________ 5 Water circuit _________________________ 6 Technical data _______________________ 7 Operation ___________________________ 8 Preparation _________________________ 8 Fill water system _____________________ 9 Making coffee ______________________ 10 Programming _______________________ 11 Reset to factory settings______________ 12 Empty water sy
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.
Main Components Overview 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15) 16) 17) 18) 19) 20) Closing handle Cover Compact brewing unit (CBU) Capsule inlet Side panel Flow meter Button "small cup", back lighted Coffee outlet Button "large cup", back lighted Container for used capsules Drip grid Drip tray Lower chassis Thermoblock TB 2003 Electronic control board Pump CP4-SP C2 Water tank connector On/Off switch Upper chassis Water tank 1 5 4 3 2 6 7 20 8 9 10 11 12 19 13 18 14 Service Manual E
Main Components Overview of rating plates NESPRESSO Type C100 ref 11244 1260W 220-240V 50Hz Machine type Voltage and power rating Approval seal(s) Data matrix Serial number Bar code (Krups) 1260W 50Hz Made in Switzerland Fabriqué en Suisse 0527 8074 7305 9100 015 0043809 220-240V~ MADE IN SWITZERLAND • • • • • • MAGIMIX M100 AUTO 0044217 The rating plate - can be found at the underside of the coffee machine, - may be of varying design, depending on the brand, - carries the following informat
Main Components Water circuit 1) 2) 3) 4) 5) 6) 7) Water tank Water tank valve and connector Flow meter Pump Thermoblock Compact brewing unit (CBU) Coffee outlet 6 7 1 3 2 5 Service Manual EF 473 / EF 474 6 4 Version 1.
Main Components Technical data Mains EF 473 291 mm 255 mm Power consumption EUR USA /CAN JAP 230V / 50 Hz 120 V / 60 Hz 100 V / 50-60 Hz Approvals SEV, CENELEC, CE-conform, UL, CUL, MITI Cable length ~1,5 m Pump data 166 EF 474 mm 291 Ratings Preheating 1 small cup 1 large cup Stand-by mode 8.0 Wh (40 ml*) 4.5 Wh (110 ml*) 9.5 Wh (in 1 h) 11 Wh Pump pressure - max.
Operation Preparation 1. 2. 3. 4. 5 1 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. 4 ) 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. 6 Service Manual EF 473 / EF 474 3 2 8 7 Version 1.
Operation Fill water system 2 If the coffee machine cannot pump water although there is water in the tank, the water circuit may be empty. 5 4 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.
Operation Making coffee 1. 2. 3. 4. 5. Open closing handle. Insert capsule. Press down closing handle completely. Position cup under coffee outlet. Press button "small cup" or "large cup". Coffee flow starts and stops automaticly. 6. In case the cup is going to flow over, press the same button again. 7. Briefly open closing handle after coffee preparation and eject capsule into capsule container. 1 3 2 5 4 7 6 Service Manual EF 473 / EF 474 10 Version 1.
Operation Programming 2 The filling amount for coffee is preset and can be changed with the following procedure. ) 3 Factory settings: Button "small cup" ........................40ml Button "large cup".......................110ml Switch on machine. Open closing handle. Insert capsule. Press down closing handle completely. Position a cup under coffee outlet. Press and hold button "small cup" for at least 3 seconds to start the programming mode. 7. Release button after desired filling amount is in cup.
Operation Reset to factory settings 1. 2. 3. 4. Switch off machine. Press and hold button "large cup". Switch on machine. Release button. 2 1 4 3 Service Manual EF 473 / EF 474 12 Version 1.
Operation Empty water system 5 After operation, residual water remains in the water circuit. 3 2 This residual water can be removed - before a longer period of non-use, - for frost protection, - before repair and following shipping. 1. 2. 3. 4. 5. 6. 7. 8. Switch off machine. Empty or remove water tank. Press and hold button "small cup". Then switch on machine and release button. The pump begins to empty the water system and stops automatically after approximately 5 seconds.
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.
Troubleshooting Checking the machine on receipt The receipt check enables you to rapidly locate faults on the machine and to initiate appropriate repair action. Check procedure 1 Check appliance for visible damage Follow the check procedure. Repair any faults found and check if the machine is operating perfectly. Symptoms Action / repair work 1.1 Parts of housing broken or damaged YES - Replace parts if necessary NO - Go to point 1.2 1.
Troubleshooting Check procedure 4 Press On/Off button to perform automatic self test - continued Symptoms Action / repair work YES - g) Check if electrical wires are functional 4.1 Machine is not working (no function) - continued Further action / repair work YES - Replace electronic mainboard NO - Replace defective(s) wire(s) NO - Go to point 4.2 YES - Check if thermoblock heating element is func4.2 Backlighted coffee button blinks at irregular tional intervals NO - Self test ok.
Repair General disassembly Tool: - Oval screwdriver ) Empty water system if necessary (see page 12). 5 from the mains before Unplug disassembling machine - appliance 33 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.
Repair Replacing thermoblock and NTC Tools: - ) Use a torque wrench (90 - 110 Ncm) to tighten NTC temperature sensor (43) with spring washer (42). Torx screwdrivers T10, T30 Open-ended spanner 10 mm AF Torque wrench Procedure: 1. Follow general disassembly (see page 16). 2. Remove screw (23) and detach holder (48) with flow meter (47). 3. Remove 3 screws (23) and separate thermoblock (40) with support (40) from chassis. 4. Remove screw M3.
Repair Replacing flow meter and On/Off switch Tools: - Torx screwdriver T10 24 23 Procedure for flow meter: 1. Follow general disassembly (see page 16). 2. Remove screw (23) and detach holder (48) with flow meter (47). 3. Snap holder (48) from flow meter (47). 4. Unplug connector from flow meter (47). 5. Remove hoses from flow meter (47) and replace it. 6. Assemble in reverse sequence. 48 47 28 Procedure for On/Off switch: 1. Follow general disassembly (see page 16). 2.
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.
Repair Replacing electronic control board with button prints Tools: - Torx screwdriver T10 service engineer must be The earthed using an earthing strap! ) Only touch button prints with dedicated gloves to avoid oxydation. Procedure: 1. Follow general disassembly (see page 16). 2. Detach prints of buttons "small cup" (30) and "large cup" (29) from upper chassis (1). 3. Remove housing (28) from electronic control board (28). 4. Unplug NTC connector and all wires from electronic control board (28). 5.
Repair Replacing compact brewing unit (CBU) 33 Tools: - Torx screwdrivers T10, T20 Blade screwdriver no. 4 Oval screwdriver Long-nose pliers Torque wrench 23 2 36 34 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.
Repair Electronic control board, wiring diagram - Europe (230V / 50 Hz) 1) 2) 3) 4) 5) 6) 7) 8) Heat sink Print for button "large cup" with LED Print for button "small cup" with LED Flow meter NTC temperature sensor Fine-wire fuse on thermoblock On/Off switch Fine-wire fuse on pump Electronic Main Board Print “large cup” Print “small cup” 1 3 2 Flow meter 4 Thermoblock NTC 6 T 167°C Line Neutral Pump Heat 5 GND Pump 8 1a 2a T 128°C 1 2 7 On/Off switch Mains Plug L N PE Service Manual
Repair Electronic control board, wiring diagram - USA (UL, 120 V / 60 Hz) 1) 2) 3) 4) 5) 6) 7) 8) Heat sink Print for button "large cup" with LED Print for button "small cup" with LED Flow meter NTC temperature sensor Fine-wire fuse on thermoblock On/Off switch Fine-wire fuse on pump 5 Electronic Main Board Print “large cup” Print “small cup” 1 3 2 Flow meter 4 Thermoblock 6 NTC T 167°C Line Neutral Pump Heat 5 1a 8 Pump T 128°C 2a 7 On/Off switch 1 2 Mains Plug L N Service Manual EF
Repair Electronic control board, wiring diagram - Japan (100 V / 50-60 Hz) 1) 2) 3) 4) 5) 6) 7) 8) Heat sink Print for button "large cup" with LED Print for button "small cup" with LED Flow meter NTC temperature sensor Fine-wire fuse on thermoblock On/Off switch Fine-wire fuse on pump Electronic Main Board Print “large cup” Print “small cup” 1 3 2 Flow meter 4 Thermoblock 6 Pump NTC T 167°C Line Neutral Pump Heat 5 8 T 128°C 1a 2a 7 On/Off switch 1 2 Mains Plug L N Service Manual EF 47
Repair Descaling (1) 2 Only use Nespresso decalcifier never vinegar! Decalcifier is aggressive to surfaces. Preparation: 1. Switch off machine. 2. Eject capsule. Insert filter from descaling kit in capsule inlet and close handle. 3. Empty drip tray and capsule container and remove drip grid. 4. Re-insert drip tray and place a pot on it. ) 3 1 Carefully read safety instructions on decalcifier package. 5. Fill water tank with 0.1 l descaling fluid and 0.5 l water. Re-insert water tank. 6.
Repair Descaling (2) 13 10. Fill water tank again with descaling solution from pot. 11. Repeat descaling procedure one more time: Press button "large cup" and let entire descaling solution run through. 10 Rinsing: 12. Empty pot. 13. Remove filter from capsule inlet. 14. Rinse water tank thoroughly and fill it with fresh water. 15. Place pot on drip tray. 16. Press button "large cup" to start pump. Let complete content of water tank run through coffee outlet. 17.
Repair Measuring flow rate Procedure: 2 1 1. Fill water tank. 2. Insert pressure plug in capsule inlet. 3. Press down closing handle lightly till pressure plug fits in capsule cage. 4. Pull off holding device. The pressure plug clamps itself to the capsule cage. 5. Position measuring beaker underneath exit tube of pressure plug. 6. Switch on machine. 7. Press button "large cup" after heating-up. 8. Open valve fully till water begins to flow. 9. Close valve until 12 bar are indicated.
Repair Checking for leaks and pump pressure (1) The following components are checked for leaks: - Compact brewing unit - Connections - Thermoblock - Pump 4 2 3 Preparation (unplug machine from mains): 1. Remove right side panel (pump is visible). 2. Insert pressure plug in capsule inlet. 3. Press down closing handle lightly till pressure plug fits in capsule cage. 4. Pull off holding device. The pressure plug clamps itself to the capsule cage. 5. Position pot underneath exit tube of pressure plug. 6.
Repair Checking for leaks and pump pressure (2) 10 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). ) 11 9 8 The pressure will rise slowly due to the temperature increase.
Repair Measuring coffee temperature Procedure: 1. Switch on machine. 2. Position measuring beaker underneath coffee outlet. 3. After warming up, press button "large cup" and preheat coffee outlet with hot water. 4. Insert a capsule (Cosi is the most suitable). 5. Press a button "large cup". 6. Wait until 20 ml coffee has flown in the measuring beaker. 7. Measure the coffee temperature approx. 5 - 10 mm below the outlet opening. ) Coffee temperature should be approx. 86 °C ± 3 °C (187 °F ± 5.4 °F).
Repair Daily care and final cleaning 1 Procedure (machine is switched off): 2 1. 2. 3. 4. 5. 6. 7. 8. Eject capsule. Empty capsule container. Empty water tank and drip tray. Clean water tank and drip tray. Fill tank with fresh water. Reassemble coffe machine. Switch on machine. Press a coffee button and rinse coffee outlet. 9. Clean coffee machine. 3 5 4 9 8 7 Service Manual EF 473 / EF 474 32 Version 1.
Spare Parts Repair accessories Pos. 1 2 2 3 4 EFR nr. * * * 0004872 0004878 Component Pressure gauge Repairing/service holder device A (for EF 473) Repairing/service holder device B (for EF 474) Special screwdriver with oval bit Oval bit for screwdriver * Only available through Nespresso. Please call your Nespresso contact. 1 2 0004878 0004872 Service Manual EF 473 / EF 474 33 Version 1.
Spare Parts Spare parts EF 473 Service Manual EF 473 / EF 474 34 Pos. 1 2 3 5 5 6 7 8 8 EFR nr.
Spare Parts Spare parts EF 473 (continued) Service Manual EF 473 / EF 474 Pos. 26 28 28 28 29 30 31 32 33 34 35 36 37 38 39 40 40 40 41 42 43 46 47 48 49 50 900 900 900 900 900 900 35 EFR nr.
Spare Parts Spare parts EF 474 Service Manual EF 473 / EF 474 36 Pos. 1 2 3 5 6 7 EFR nr.
Spare Parts Spare parts EF 474 (continued) Service Manual EF 473 / EF 474 Pos. 26 28 28 28 29 30 31 32 33 34 35 36 37 38 39 40 40 40 41 42 43 44 46 47 48 49 50 900 900 900 900 900 900 37 EFR nr.
Notes Service Manual EF 473 / EF 474 38 Version 1.
