SERVICE MANUA L CITIZ COFFEE MACHINE S

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S E R V I C E M A N U A L C I T I Z C O F F E E M A C H I N E S .v
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EF 483/484 Citiz & milk EF 485/486 Citiz & Co EF 487/488 e
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Citiz Version 1.2 en
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C O N T E N T S de
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1 General Safety Notes ........................................................................................ 6 e
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2 Model overview ................................................................................................... 7 2.1 Model range ....................................................................................................... 7 2.2 Core unit versions .............................................................................................. 8 3 Main Components .............................................................................................. 9 3.1 Overview ­ core unit, D ­ range .......................................................................... 9 3.1.1 Interior view ­ core unit, D ­ range........................................................... 10 3.2 Overview ­ core unit, C ­ range ........................................................................ 11 3.2.1 Interior view ­ core unit, C ­ range........................................................... 12 3.3 Overview ­ model Citiz ..................................................................................... 13 3.4 Overview ­ model Citiz & milk .......................................................................... 14 3.4.1 Overview ­ milk frother AERO3 ............................................................... 15 3.5 Overview ­ model Citiz & Co ............................................................................ 16 3.6 Fluid System .................................................................................................... 17 3.6.1 Water circuit diagram of core unit (all Citiz versions) .............................. 17 3.6.2 Water circuit of models Citiz / Citiz & milk............................................... 18 3.6.3 Water circuit of model Citiz & Co ............................................................ 19 4 Technical Data .................................................................................................. 20 4.1 Rating Plates.................................................................................................... 20 4.1.1 Examples of brand specific rating plates ................................................ 20 4.1.2 Rating plate details ................................................................................. 23 4.1.3 Rating plate of milk frother (model Citiz & milk) ...................................... 24 4.2 Summary of technical data............................................................................... 25 4.2.1 Technical data of coffee machines ......................................................... 25 4.2.2 Technical data of milk frother (model Citiz & milk).................................. 27 4.2.3 Dimensions and weight ­ model Citiz ...................................................... 28 4.2.4 Dimensions and weight ­ model Citiz & milk ........................................... 29 4.2.5 Dimensions and weight ­ milk frother ...................................................... 29 4.2.6 Dimensions and weight ­ model Citiz & Co ............................................. 30 5 Operation ............................................................................................................ 31 2 5.1 General information.......................................................................................... 31 5.2 Status indication............................................................................................... 31 5.2.1 Status indication of coffee machine ........................................................ 31 5.2.2 Status indication of milk frother AERO3.................................................. 33 5.3 Machine modes................................................................................................ 34 5.3.1 Machine modes of Citiz coffee machines ............................................... 34 5.3.2 Machine modes of milk frother AERO3................................................... 35 5.4 Program / reset fill up level............................................................................... 36 5.4.1 Programming the fill up level................................................................... 36 5.4.2 Resetting the fill up level ......................................................................... 36 5.5 Empty water system......................................................................................... 37
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Descaling ......................................................................................................... 41 6.2.1 Descaling procedure for models Citiz and Citiz & milk ........................... 41 6.2.2 Descaling procedure for model Citiz & Co.............................................. 45 w
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Daily maintenance and cleaning ...................................................................... 38 6.1.1 Before first coffee or at the start of day .................................................. 38 6.1.2 After last coffee or at the end of day....................................................... 39 6.1.3 Milk frother of model Citiz & milk ............................................................ 40 m
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6 Maintenance ...................................................................................................... 38 7 Troubleshooting ............................................................................................... 49 7.1 Check list for coffee machine (all models) ....................................................... 49 7.2 Check list for milk frother ................................................................................. 51 8 Repairs ............................................................................................................... 52 8.1 Safety instructions ........................................................................................... 52 8.2 Repair and mounting tips ................................................................................. 52 8.3 Tools and accessories ..................................................................................... 55 8.4 Platform disassembly ­ model Citiz.................................................................. 56 8.4.1 General disassembly .............................................................................. 56 8.4.2 Replacing water tank connector ............................................................. 59 8.4.3 Replacing mains switch .......................................................................... 60 8.4.4 Replacing power cord ............................................................................. 62 8.4.5 Removing core unit................................................................................. 64 8.5 Platform disassembly ­ model Citiz & milk ....................................................... 67 8.5.1 General disassembly .............................................................................. 67 8.5.2 Replacing water tank connector ............................................................. 71 8.5.3 Replacing milk frother connector ............................................................ 73 8.5.4 Replacing mains switch .......................................................................... 74 8.5.5 Replacing power cord ............................................................................. 75 8.5.6 Removing core unit................................................................................. 77 8.6 Platform disassembly ­ model Citiz & Co......................................................... 80 8.6.1 General disassembly .............................................................................. 80 8.6.2 Replacing water tank connector ............................................................. 84 8.6.3 Replacing mains switch .......................................................................... 85 8.6.4 Replacing power cord ............................................................................. 87 8.6.5 Removing core units ............................................................................... 89 8.7 Disassembly of core unit, C ­ range................................................................. 91 8.7.1 General disassembly .............................................................................. 91 8.7.2 Replacing compact brewing unit............................................................. 96 8.7.3 Replacing pump...................................................................................... 98 8.7.4 Replacing flow meter ............................................................................ 101 8.7.5 Replacing automatic priming device (APD) .......................................... 102 8.7.6 Replacing thermoblock with NTC sensor and fine wire fuse(s) ............ 104 8.7.7 Replacing electronic control board with button prints ........................... 107 8.8 Disassembly of core unit, D ­ range............................................................... 109 8.8.1 General disassembly ............................................................................ 109 8.8.2 Replacing electronic control board with button prints ........................... 116 8.9 Wiring diagrams ............................................................................................. 118 8.9.1 Wiring diagrams ­ model Citiz............................................................... 118 8.9.2 Wiring diagrams ­ model Citiz & milk, EF 485 / 486 ............................. 124 8.9.3 Wiring diagrams ­ model Citiz & Co, EF 487 / 488 ............................... 128
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9 Function tests ................................................................................................. 130 w
Safety instructions.......................................................................................... 130 9.2 Required equipment....................................................................................... 130 9.2.1 Overview ............................................................................................... 130 9.2.2 Pressure adapter .................................................................................. 131 9.3 Measure flow rate........................................................................................... 132 9.4 Pressure and leakage checks ........................................................................ 133 9.4.1 Preparations.......................................................................................... 134 9.4.2 Test run ................................................................................................. 135 9.5 Measure coffee temperature .......................................................................... 136 9.6 Milk frother tests............................................................................................. 138 9.6.1 Measure hot milk temperature .............................................................. 138 9.6.2 Measure milk froth ratio ........................................................................ 138 9.7 NTC temperature sensor functionality............................................................ 139 9.8 Protective earth (PE) continuity test............................................................... 141 9.8.1 What coffee machine has to be tested and when? ............................... 141 9.8.2 General ................................................................................................. 141 9.8.3 Test sequence ...................................................................................... 142 9.8.4 What to do if the protective earth continuity test fails............................ 143 9.9 Protective insulation test ................................................................................ 144 9.9.1 What coffee machines have to be tested and when? ........................... 144 9.9.2 General ................................................................................................. 144 9.9.3 Test sequence ...................................................................................... 145 9.9.4 What to do if the insulation test fails ..................................................... 147 e
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9.1 10 Explosion Drawings ...................................................................................... 148 10.1 Model Citiz, core unit D ­ range (EF 483)....................................................... 148 10.2 Model Citiz, core unit C ­ range (EF 484)....................................................... 149 10.3 Model Citiz & milk, core unit D ­ range (EF 485)............................................ 150 10.4 Model Citiz & milk, core unit C ­ range (EF 486)............................................ 151 10.5 Model Citiz & Co, core unit D ­ range (EF 487).............................................. 152 10.6 Model Citiz & Co, core unit C ­ range (EF 488).............................................. 153 11 Parts List .......................................................................................................... 154 12 Notes .................................................................................................................158
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P R E F A C E e
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The required utility software to read PDF files (Adobe Reader ® ) for PCs and MAC computers can be downloaded (under http://www.adobe.com) for free ­ please click the logo: de
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For fast access to information directly from the PC or MAC monitor, this service manual is available as PDF file and can be downloaded from the Nespresso technical website under https://business.nespresso.com. Please keep this manual together with the corresponding service documentation. This way you are assured to have the necessary information. .v
This manual should be used by the technicians as a valuable aid to guarantee the permanent readiness for use of the machines. In order to take full advantage of all the functions, it is absolutely necessary to follow the instructions in this manual. w
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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 Citiz coffee machine types EF 483/484, EF 485/486 and EF 487/488. 2 PDF versions of this service manual can be selected: • A highly compressed version with low picture resolution and small file size. • A version in print quality with hyperlinks, but with big file size. The version number of this service manual is printed on the lower right corner of the front page.
C O N T E N T U P D A T E S Version 1.2 • Chapter "Function tests": correction of the protective insulation test (connection of the test equipment to both neutral and phase pins instead of ground pin). See subtitle "Test sequence" on page 145, steps 1 till 3 (connection of the measuring cable). • Service manual is available in additional languages: French, German, Spanish and Italian Version 1.1 • First released service manual version, in English only. Version 1.0 • Test version for proofreading, in English only. Citiz service manual 5 o
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Mains voltage inside the coffee machine. e
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Risk of fatal electrical shock and fire! .v
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1 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 the 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 cir­ cuit conductors. Example illustrations of typical devices. 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. 1) RCD protected socket­outlet 2) Plug­in RCD unit 3) GFCI socket 4) Plug­in GFCI Danger of burns! Hot parts and water under pressure inside the coffee machine (particularly in the thermoblock). • 6 Let coffee machine cool down before cleaning or disassembly.
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2 1) Citiz 2) Citiz & milk e
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With core unit D­range: With core unit C­range: de
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2.1 Model range 3) Citiz & Co Each model ­ has a special platform ­ is available in 2 different designs, depending on the core unit version (C­ or D­range). Citiz service manual A core unit is the actual coffee machine, mounted on a platform.
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2.2 Core unit versions C­range e
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D­range w
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This comparison helps to identify the core unit version. 1) Coffee outlet 2) Closing handle There are additional differences between the 2 versions (cov­ ers, wiring etc.) not men­ tioned in the table. Different components Coffee outlet (1) D­range contured coffee outlet C­range "flat" coffee outlet Closing handle (2) chromium­plated closing handle black closing handle Coffee buttons (3) arranged on both sides of the closing handle Cup holder (4) 8 3) Coffee buttons 4) Cup holder Citiz service manual arranged behind the closing handle cup holder with slotted recesses cup holder with circular recesses
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3.1 Overview ­ core unit, D­range e
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For platform compo­ nents refer to model overview. 1) 2) 3) 4) 5) 6) Cup support Waste water container Capsule container (used capsules) Coffee nozzle Steam cover Closing handle 7) Button "small cup" (Espresso) 8) Button "large cup" (Lungo) 9) Side panels left/right 10) Rear cover
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3.1.1 Interior view ­ core unit, D­range e
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1) Button prints 2) Capsule bay 3) Brewing unit (TMBU, Tolkien Mini Brewing Unit) 4) Pump (Invensys CP4/SP) 5) Flowmeter (FHKSC12) 10 Citiz service manual 6) Electronic control board (with protective covers) 7) Self priming device (APD) 8) NTC temperature sensor 9) Thermoblock (EF 2003)
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3.2 Overview ­ core unit, C­range e
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1) 2) 3) 4) 5) 6) Cup support Waste water container Capsule container (used capsules) Side panel, left Side panel, right Coffee nozzle 7) Steam cover 8) Closing handle 9) Button "small cup" (Espresso) 10) Button "large cup" (Lungo) 11) Top cover 12) Rear cover
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3.2.1 Interior view ­ core unit, C­range e
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1) Capsule bay 2) Brewing unit (TMBU, Tolkien Mini Brewing Unit) 3) Button prints (under top cover) 4) Pump (Invensys CP4/SP) 5) Flowmeter (FHKSC12) 12 Citiz service manual 6) Electronic control board (with protective covers) 7) Self priming device (APD) 8) NTC temperature sensor 9) Thermoblock (EF 2003)
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3.3 Overview ­ model Citiz w
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This model is pictured with a C­range core unit. 1) 2) 3) 4) 5) Drip grid Drip tray Core unit (e.g. C­range) Water tank cover Water tank 6) 7) 8) 9) Water tank connector Power cord ON/OFF switch (mains switch) Platform This is the basic model with the smallest platform (9). The drip grid (1) ­ exists in 2 versions, ­ matches with the cup holder of the core unit version (e.g. circular recesses). Citiz service manual The core units of model Citiz and Citiz & milk are not com­ patible due to different electronic control boards.
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3.4 Overview ­ model Citiz & milk w
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This model is pictured with a C­range core unit. 1) 2) 3) 4) 5) 6) 7) 8) The core units of model Citiz and Citiz & milk are not com­ patible due to different electronic control boards.
14 Drip grid Drip tray Platform Storage places for whisks Core unit (e.g. C­range) Water tank Water tank cover Milk frother (Aero 3) 9) Lid 10) Milk frother start button 11) Water tank connector 12) Power cord 13) Milk frother connector 14) ON/OFF switch (mains switch) 15) Cup storage (removable) The platform of this model is equipped with a milk frother (8). The drip grid (1) ­ exists in 2 versions, ­ matches with the cup holder of the core unit version (e.g. circular recesses). Citiz service manual o
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3.4.1 Overview ­ milk frother AERO3 w
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The milk frother AERO3 is part of the standard equipment of the model Citiz & milk. 1) 2) 3) 4) 5) Lid Seal Jug Power plug Start button (red/blue backlighted) 6) Indication of 2 max. milk levels (120 ml/240 ml) 7) Mixer for hot milk 8) Spring whisk for milk foam
The inside of the jug (3) ­ has level marks (6), ­ is surface­coated for easy cleaning. Citiz service manual 15 o
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3.5 Overview ­ model Citiz & Co w
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This model is pictured with a C­range core unit. 1) 2) 3) 4) Drip tray Drip grid ON/OFF switch (mains switch) Power cord 5) 6) 7) 8) Core units (e.g. 2 x C­range) Water tank Water tank cover Platform
The drip grid (1) ­ exists in 2 versions, ­ matches with the cup holder of the core unit version (e.g. circular recesses). 16 Citiz service manual o
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3.6 Fluid System e
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3.6.1 Water circuit diagram of core unit (all Citiz versions) 1) 2) 3) 4) 5) Water tank Flow meter Pump Self priming device Thermoblock 6) 7) 8) 9) Mini brewing unit (MBU) Capsule container Waste water container Drip tray Legend: Fresh cold water Fresh hot water Coffee Waste/drip water
The self priming device (4) ­ allows the pump to suck water when it is filled with air (new machine, empty water tank etc.) ­ removes air bubbles from the water circuit ­ feeds a water/air mix back into the water tank. Citiz service manual 17 o
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3.6.2 Water circuit of models Citiz/Citiz & milk e
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1) 2) 3) 4) 18 Water tank Water tank connector Self priming device Thermoblock Citiz service manual 5) 6) 7) 8) Flow meter Coffee outlet Brewing unit Pump
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3.6.3 Water circuit of model Citiz & Co e
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1) 2) 3) 4) Water tank Pump Brewing unit Coffee outlet 5) 6) 7) 8) Flow meter Thermoblock Water tank connector Self priming device
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4 Nespresso, EU­version This overview shows examples of various brands and is subject to alterations. 20 EF484 Citiz C110 red EF483 Citiz D110 black EF486 Citiz & milk C120 red EF485 Citiz & milk D120 black EF488 Citiz & Co C130 red EF487 Citiz & Co D130 black
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4.1.1 Examples of brand specific rating plates de
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The type plate can be found at the bottom of the coffee machine’s platform. .v
4.1 Rating plates o
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DeLonghi, EU­version e
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EF483 Citiz D110 Limousine black/DeLonghi EN165.B EF483 Citiz D110 60's White/DeLonghi EN165.CW EF485 Citiz & milk D120 Limousine black/DeLonghi EN265.BAE EF487 Citiz & Co. D130 Limousine black/DeLonghi EN325.B Koenig, CH­version EF483 Citiz D110 Limousine black/Koenig Citiz EF483 Citiz D110 60's White/Koenig Citiz EF485 Citiz & milk D120 Limousine black/Koenig Citiz & milk EF487 Citiz & Co. D130 Limousine black/Koenig Citiz & Co.
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Krups, EU­version e
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EF484 CitiZ XN700510 grey EF484 CitiZ XN700610 red EF486 CitiZ & milk XN710610 red EF488 CitiZ & Co XN750510 grey Magimix, EU­version 22 EF483 Citiz M190 ­ Ref 11290 black EF483 Citiz M190 ­ Ref 11291 cream EF485 Citiz M190 Milk ­ Ref 11300 black EF487 Citiz M190 Duo ­ Ref 11305 black
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Turmix, AT­version e
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EF484 Citiz C110 fire engine red/ Turmix TX 170 ­ Citiz EF484 Citiz C110 steel grey/Turmix TX 170 ­ Citiz EF486 Citiz & milk C120 fire engine red/ Turmix TX 270 ­ Citiz & milk EF488 Citiz & Co. C130 steel grey/ Turmix TX 370 ­ Citiz & Co. 4.1.2 Rating plate details 1) 2) 3) 4) Brand name Voltage and power rating Place of manufacture National approval sign of Russia (GOST R) 5) National approval sign of Germany (VDE) 6) Barcode 7) Serial number 8) Machine type 9) Special disposal icon (do not dispose with ordinary waste) 10) Sign of conformity (CE) 11) Conform with RoHS guidelines (lead free solder, etc.) 12) Article number of the rating plate
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Example: Checksum (if available) Type of mains plug Mains voltage e
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Color version de
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By decoding the date of production and machine type, the coffee machine can be identified exactly. fro
Decoding the alphanumeric serial number Distributing partner Incremental number per production day Manufacturing plant Manufacturer designation of the machine type (EF 484) 08312 ... Date of production (08 = year 2008, 312 = 312 day of the year) 4.1.3 Rating plate of milk frother (model Citiz & milk) Note he mains volt­ age ranges of the dif­ ferent models.
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4.2 Summary of technical data w
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4.2.1 Technical data of coffee machines Mains voltage ranges ­ Europe, RU, AU, CN, KR, SG, HK, ME, ZA, IL, BR, AR........... 220­240 V / 50­60 Hz ­ USA, Canada, BR, MX .............................................................. 120­127 V / 50­60 Hz e
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Mains voltage for Citiz Technical data are valid for all Citiz mod­ els unless explicitly stated otherwise.
­ Japan .............................................................................................. 100 V / 50­60 Hz* Mains voltage for Citiz & milk ­ Europe, RU, AU, CN, KR, SG, HK, ME, ZA, IL, BR, AR........... 220­240 V / 50­60 Hz ­ USA, Canada, BR, MX .............................................................. 120­127 V / 50­60 Hz Mains voltage for Citiz & Co ­ Europe, RU, AU, ME, IL............................................................ 220­240 V / 50­60 Hz Approvals Approvals for Citiz ........................ CE, UL "for USA and Canada", PSE, Gost R, Ctick, CCC, KTL, SPRING, SASO, SABS, ISI, IRAM, NOM Approvals for Citiz & milk ............ CE, UL "for USA and Canada", Gost R, Ctick, CCC, KTL, SPRING, SASO, SABS, ISI, IRAM, NOM Approvals for Citiz & Co .................................................. CE, Gost R, Ctick, SASO, ISI Power ratings of coffee machine main components (for all voltages and frequencies) Thermoblock .....................................................................................................1200 W* *model Citiz & Co, Australia: 1080 W Pump................................................................................................................. 55/60 W Performance data of core unit Heating up ­ Citiz ...................................................................................................... approx. 7.6 Wh ­ Citiz & milk ........................................................................................... approx. 7.6 Wh ­ Citiz & Co ........................................................................................... approx. 14.9 Wh 1 small cup (40 ml*) ­ Citiz ...................................................................................................... approx. 4.3 Wh ­ Citiz & milk ........................................................................................... approx. 4.3 Wh ­ Citiz & Co (both heads)........................................................................ approx. 7.6 Wh * Default setting Citiz service manual 25 d
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1 large cup (110 ml*) * Default setting e
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­ Citiz ...................................................................................................... approx. 8.7 Wh ­ Citiz & milk ........................................................................................... approx. 8.7 Wh ­ Citiz & Co (both heads) ...................................................................... approx. 14.8 Wh Standby operation (in 1 hour) ­ Citiz ...................................................................................................... approx. 0.7 Wh ­ Citiz & milk ........................................................................................... approx. 0.7 Wh ­ Citiz & Co ............................................................................................. approx. 2.2 Wh Pump Pump pressure ­ Max. permissible .............................................................................. 17.5 bar ± 1.5 bar ­ During coffee preparation (depending on the type of coffee).......................... 9­16 bar Flow performance.................................................................. 120­240 ml/min. at 12 bar Capacities Advised water tank capacities to avoid spilling.
Water tank ­ Citiz ........................................................................................................................1.0 l ­ Citiz & milk .............................................................................................................1.0 l ­ Citiz & Co ...............................................................................................................1.4 l Drip tray ­ Citiz ....................................................................................................................100 ml ­ Citiz & milk .........................................................................................................180 ml ­ Citiz & Co ...........................................................................................................250 ml Capsule container ­ Citiz, Citiz & milk .................................................................................... 9­11 capsules ­ Citiz & Co ........................................................................................2x (9­12) capsules Temperatures Operating temperature ................................................................... + 5 °C up to + 45 °C Storage temperature ..................................................................... ­ 25 °C up to + 60 °C Safety temperature (thermal cut­off) ................................................................... 167 °C Coffee temperature at outlet....................................................................... 86 °C ± 3 °C Various data Noise during brewing cycle .................................................................... max. 60 dB(A)* * model Citiz & milk: measured without milk frother * model Citiz & Co: measured with only one core unit running Preheating time .......................................................................................approx. 60 sec Cable length .............................................................................................. approx. 1.2m 26 Citiz service manual o
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4.2.2 Technical data of milk frother (model Citiz & milk) w
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USA/Canada ................................................................................ 120­127 V / 50­60 Hz e
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The milk frother ­ is available in 2 different models, depending on above mains voltage ranges, ­ has to match the mains voltage range of the associated coffee machine. de
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Europe ........................................................................................ 220­240 V / 50­60 Hz .v
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Mains voltage If replacing a defect milk frother, check mains voltage range. Power rating (depending on mains voltage) 220­240 V, 50­60 Hz ..................................................................................... 410­490 W 110­127 V, 50­60 Hz ..................................................................................... 380­505 W Standby operation ............................................................................................... < 1 W Power consumption Voltage Unit 120 V 127 V 220 V 230 V 240 V Measured power W 452 506 407 445 485 Intensity A 3.77 3.98 1.85 1.93 2.02 Wh 19 19 19 19 19 Measured power W 1.98 2.24 2.72 2.80 3.01 Intensity of current (cos. = 0.58) A 40.93 44 30.82 27.51 25.97 Consumption for 2 test preparations Wh 0.08 0.09 0.11 0.12 0.13 Measured power W 452 506 407 445 485 Intensity of current A 3.77 3.98 1.85 1.93 2.02 Consumption for 2 test preparations Wh 37 37 37 37 37
Preparation Froth milk: hot (starting with cold device) Consumption for 2 test preparations Froth milk: cold (starting with cold device) Hot milk (starting with cold device) Capacity Hot milk ...................................................................................................... max. 240 ml Hot/cold milk for milk froth........................................................................... max. 130 ml Citiz service manual 27 d
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Whisk speed......................................................................................... 2’000­2’700 rpm e
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Preparation times (with full, semi­skimmed or skimmed milk at 8 °­10 °C fridge temperature) Hot milk froth (120 ml) .....................................................................................50­80 sec Cold milk froth (120 ml) ...................................................................................60­80 sec Hot milk (240 ml) .........................................................................................120­180 sec Temperature Hot milk ............................................................................................. + 60 °C to + 70 °C Foam milk.......................................................................................... + 60 °C to + 70 °C Various data Noise emission ........................................................................................ max. 55 dB(A) 4.2.3 Dimensions and weight ­ model Citiz The overall dimen­ sions are the same for both core unit ver­ sions (C­ and D­range). Dimensions in mm
Dimensions (width x height x length)............................................. 130 x 277 x 372 mm Cup support down .............................. 85­90 mm, for espresso and lungo cups/glasses Cup support up .......................................................150­155 mm, for macchiato glasses Weight (without water)..............................................................................approx. 3.4 kg 28 Citiz service manual o
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4.2.4 Dimensions and weight ­ model Citiz & milk w
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The overall dimen­ sions are the same for both core unit ver­ sions (C­ and D­range). Dimensions (width x height x length) ............................................ 237 x 277 x 372 mm Weight (without water, milk frother included) ...........................................approx. 4.6 kg 4.2.5 Dimensions and weight ­ milk frother Dimensions of jug cpl. (diameter x height) ................................................ 91 x 170 mm Whisk for foam (diameter x height) ..............................................................33 x 32 mm Mixer for hot milk.................................................................................. 15 x 34 x 32 mm Weight (with whisk and mixer) ..............................................................................0.7 kg Citiz service manual 29 d
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4.2.6 Dimensions and weight ­ model Citiz & Co w
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The overall dimen­ sions are the same for both core unit ver­ sions (C­ and D­range). Dimensions in mm.
Dimensions (width x height x length)............................................. 326 x 281 x 286 mm Weight (without water).................................................................................approx. 7 kg 30 Citiz service manual o
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For an overview of operational controls see “Main Components” on page 9. For basic operation of the machine such as preparing a coffee and other related infor­ mation, refer to the user manual. To simplify matters, the model Citiz with core unit C­range is used to exemplify throughout this chapter. de
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5.1 General information 5.2 Status indication 5.2.1 Status indication of coffee machine The two coffee buttons with green LED backlight show the status of the coffee machine according to the following table: Machine status etc. " Small cup" button " Large cup" button LED signal Off Both LED‘s off Self test Blinking 1 Hz, 0.5 s on, 0.5 s off Error Blinking fast (2 Hz, 0.25 s on/0.25 s off) 3 times every 2 sec­ onds Heat up Blinking 1 Hz, 0.5 s on, 0.5 s off Ready Both LED‘s on Brewing small cup Blinking 1 Hz, 0.5 s on, 0.5 s off Brewing big cup Blinking 1 Hz, 0.5 s on, 0.5 s off Rinse small cup Rinse big cup Blinking 1 Hz, 0.5 s on, 0.5 s off (same as brewing small cup) Blinking 1 Hz, 0.5 s on, 0.5 s off (same as brewing big cup)
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O P E R A T I O N " Large cup" button LED signal
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Machine status etc. Descaling ready Descaling pump on (descal) Descaling pump off (descal) 32 e
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Blinking 1 Hz, 0.5 s on, 0.5 s off (same as brewing small cup) Blinking 1 Hz, 0.5 s on, 0.5 s off (same as brewing big cup) Blinking 2 Hz, 0.25 s on, 0.25 s off Blinking 2 Hz, 0.25 s on, 0.25 s off (same as descaling ready mode) Blinking 2 Hz, 0.25 s on, 0.25 s off (same as descaling ready mode) Emptying / Evaporating Blinking 2 Hz, 0.25 s on, 0.25 s off Standby Blinking 0.5 Hz, 1 s on, 1 s off alternately Resetting Blinking 2 Hz, 0.25 s on, 0.25 s off indication for 3 s Power save Blinking 0.2 Hz, 2.5 s on, 2.5 s off alternately Overheat Blinking 1 Hz, 0.5 s on, 0.5 s off (same as heat up) Power save activation Blinking 0.5 Hz, 1 s on, 1 s off alternately 5 times Citiz service manual o
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Blinking 0.5 Hz, 1 s on, 1 s off alternately 3 times Power save deactivation (only for model Citiz & Co) de
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Machine status etc. 5.2.2 Status indication of milk frother AERO3 The operating button with red/blue backlight shows the status of the milk frother according to the following table: Machine status etc. Operating button Light signal Off Backlight off On ­ hot milk preparation Red backlight on On ­ cold milk froth prepara­ tion Blue backlight on Failure/malfunction (e.g. overheating because of burnt milk, too less or no milk) Blinking red backlight (1 Hz, 0.5 s on, 0.5 s off) Failure: milk frother has wrong mains voltage range Fast blinking red backlight (2 Hz, 0.25 s on, 0.25 s off
Citiz service manual To reset a red blink­ ing backlight: 1. Remove milk frother from platform. 2. Remove cause of failure if possible. 33 o
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5.3 Machine modes 1 Heat up mode 2 Self test mode 3 Ready mode 4a Brewing mode 4b Volume brewing mode (program­ ming cup size) 5 Descaling mode 34 Citiz service manual Enter mode e
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This table helps to understand the operating modes of a Citiz coffee machine: .v
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5.3.1 Machine modes of Citiz coffee machines Actions Exit mode Heats up thermoblock to ready temperature Every time after switch­ e.g. switching off 90 °C within 60 s with­ ing on machine machine out overshooting target temperature Tests: • NTC short circuit • NTC connected Every time after switch­ • Thermoblock heating e.g. switching off ing on machine machine curve Error handling: Tracking of the last 5 errors by a ring buffer • After heat up and self test mode was ok • After brewing or volume brewing Keeps thermoblock e.g. switching off coffee temperature at 90 °C machine • After reset mode • After leaving descaling mode • Press and release large or small coffee button when • Press and release machine was in large or small coffee brewing mode or button (brewing automatic exit given mode) by the flow meter • Press and hold large • Release large or or small coffee small coffee button button for more than when machine was 3 s (programming in programming mode) mode • Switching off machine • Press and hold both • Regulate tempera­ coffee buttons for at ture to 65 °C (after least 0.5 s • Switch on machine, pump was started) Note: wait until ready • Stop and start pump When machine is • Press and hold both with any coffee switched off during any coffee buttons for at button, no volume descaling mode, then it least 3 s brewing in descaling goes to descaling mode mode ready state after next switch on.
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7 Resetting mode Actions Exit mode
Start pump Stop pump after 10 s Heat up thermo­ block to 105 °C Switch off machine (100% power) 4) Switch off ther­ moblock 5) Go to standby mode 1) Switch off machine • Reset the 2) Press and hold programmed large large coffee button and small coffee 3) Switch on machine volumes to factory setting proceeds with self test • Indicate the resetting mode automatically mode for 3 s Factory settings: • small cup .... 40 ml • large cup ... 110 ml Press any coffee but­ To enable power save ton to activate ready mode: mode 1) Switch off machine 2) Press and hold • Reduce thermoblock To disable power save both coffee buttons temperature mode: 3) Switch on machine • Switch LED indica­ 1) Switch off machine 4) Coffee button tion to power save 2) Press and hold LED‘s blink 5 times both coffee buttons mode (blinking alter­ alternatively as nately every 2 sec) 3) Switch on machine confirmation 4) Coffee button LED‘s blink 3 times After that automatically alternatively as after 30 min of non use confirmation Automatically by fol­ Machine indicates fail­ lowing failures: ure with coffee button a) NTC short circuit When failure is fixed LED‘s as long as the b) NTC not connected failure is present c) Heat up too slow • Switch thermoblock off Automatically after Switch off the machine emptying mode • Switch LED indica­ tion to standby mode m
6 Emptying mode (evaporing) Enter mode 1) Switch off machine 1) 2) Press and hold 2) small coffee button 3) Switch on machine 3) fro
Machine mode 5.3.2 Machine modes of milk frother AERO3 Machine mode Enter mode 1 Hot milk / milk froth Press start button preparation briefly Keep start button 2 Cold milk froth prepa­ pressed for approx. ration 2 sec Actions Exit mode Start button lights up Automatic switch­off red. Milk is heated and after preparation mixed. Start button lights up Automatic switch­off blue. Milk is mixed only. after preparation Citiz service manual 35 o
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Each coffee button can be programmed with a coffee volume for an individual cup size. The procedure for programming/resetting is the same for both coffee buttons. Programmable volume range .......................................................................... 10­750 ml Each new program­ ming cycle starts with the min. volume (10 ml after 3 sec), regard­ less of a preprogrammed coffee volume. 1) Prepare coffee as usual (see user manual), but keep the coffee button pressed for at least 3 seconds in order to start programming mode. 2) Only release the button when the desired fill level is reached. 5.4.2 Resetting the fill up level With the following procedure all programmed fill up levels will be set back to this factory settings: Coffee button "small cup" ....................................................................................... 40 ml Coffee button "large cup" ..................................................................................... 110 ml 1) Switch off the coffee machine. 36 Citiz service manual 2) Press and hold the "large cup" button. 3) Switch on the coffee machine. 4) Release "large cup" button.
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1) Switch off coffee machine. w
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After every operation, some water remains in the coffee machine. Therefore the water system must be emptied ­ if the coffee machine will not be used for a long time ­ as antifreeze measure ­ for repairs and shipment. 2) Remove water tank. 3) Place a beaker under the coffee out­ let. Model Citiz & Co: Only one core unit should be emptied at the same time (danger of mains supply overload). After this procedure, the coffee machine will not be ready for approx. 10 min (until the thermoblock cools to below 100 °C ). 4) Press and hold button "small cup". 5) Switch the coffee machine on again. 6) Release button "small cup". ­ The pump starts to drain the water system and stops automatically. ­ The coffee buttons blink fast simulta­ neously. 7) After automatic stop, switch off the coffee machine.
Citiz service manual 37 o
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The Citiz model is shown as example. Maintain and clean other models accordingly. de
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6 1) Fill water tank with fresh potable water. 2) Insert water tank. 3) For model Citiz & milk: Attach whisk to milk frother. Place milk frother on base plate connector. 4) Switch machine on. After a longer period of non use: 5) Place a container under coffee outlet. 6) Rinse coffee machine by pressing but­ ton "large cup" about 6 times.
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6.1.2 After last coffee or at the end of day e
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Risk of fatal electrical shock and fire! Never clean wet or immerse plug, cord or appliance in any fluid. Unplug appliance and let it cool down to avoid burns. Platform and drip tray surfaces are not abrasion­proof. Never use brushes and/or cleaning agents that con­ tain aggressive or chemical components resp. sol­ vents. Do not put any part in a dishwasher. Use only a damp cloth or sponge and a mild cleaning agent if necessary 1) Switch machine off. 2) Check if capsule is ejected. 3) Empty and clean ­ capsule container (a) ­ waste water container with cup support (b) ­ drip tray with drip grid (c). Do not use a brush ­ the water tank can be scratched. 4) Empty, rinse and clean water tank. 5) Reassemble coffee machine. 6) Clean coffee machine with a damp cloth if necessary.
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6.1.3 Milk frother of model Citiz & milk w
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1) Remove milk frother from platform. 2) Remove lid and dismantle whisk. 3) Remove seal from lid. 4) Rinse and clean milk frother together with whisk or mixer, lid and seal. 5) Clean outside of milk frother with a damp cloth if necessary. 6) Reassemble milk frother.
Keep connectors dry (on platform and at underside of milk frother). 40 Citiz service manual e
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Risk of damage! The inside of the jug is coated for easy cleaning. Never use brushes and/or cleaning agents that contain abrasive or aggressive, chemical components resp. solvents. Do not put any part in a dishwasher. Use only a damp cloth and a mild cleaning agent if necessary. o
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Only use Nespresso descaler or descaling kit ­ never use vinegar! Descaler can damage casing and contact surfaces. Immediately clean drops of descaling solution. The descaling chart is based on a cup size of 40 ml. fH ... French grade dH ... German grade CaCO 3 ... Calcium carbonate Use this chart to inform a customer when to descale the coffee machine depending on local water hardness and average coffee consumption. Double the estimated time interval for model Citiz & Co. 6.2.1 Descaling procedure for models Citiz and Citiz & milk The Citiz model is shown as example. 1) Eject capsule or check if capsule is removed. 2) Remove and empty capsule/waste water container, drip tray and water tank.
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Observe the safety instructions on the descaler package. e
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Use a container with a capacity of 1 l min. 42 3) Reassemble coffee machine without water tank. 4) Place a container on the cup support. 5) Fill the water tank with 0.1 l decalcifier (1 bag) and 0.5 l water. 6) Insert water tank into the coffee machine. 7) Press both coffee buttons simulta­ neously for at least 3 sec. 8) The machine is in descaling mode now (both buttons blinking fast).
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Danger! Hot splashes of descaling solution. Do not open handle dur­ ing descaling process. e
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9) Press any button to start pump. Let the entire solution in the tank run through the system. 10) After water tank is empty, pour descal­ ing solution back into water tank. 11) Place empty container back on cup support. 12) Descale again: press any button and wait until water tank is empty.
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Danger of injury! Residual descaler may be harmful. Rinse thoroughly to remove any residue. e
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44 13) Empty container and put it back on cup support. 14) Rinse and clean water tank thoroughly and fill it with fresh potable water. 15) Rinse coffee machine by pressing any button and wait until water tank is empty. 16) Press both coffee buttons simultane­ ously for at least 3 sec to end descal­ ing mode. 17) Remove and empty container. 18) Switch off coffee machine. 19) Empty and clean capsule/waste water container and drip tray. 20) Clean coffee machine with a damp cloth if necessary.
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6.2.2 Descaling procedure for model Citiz & Co e
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1) Eject capsules or check if capsules are removed. 2) Remove and empty capsule/waste water containers, drip tray and water tank. Observe the safety instructions on the descaler package. 3) Reassemble coffee machine without water tank. 4) Place a container under each coffee outlet. 5) Fill the water tank with 0.2 l decalcifier (2 bags) and 1.0 l water. 6) Insert water tank into the coffee machine.
Citiz service manual Use containers with a capacity of 1 l min. 45 d
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7) Press both coffee buttons simulta neously for at least 3 sec. on first core unit. 8) Repeat procedure with second core unit. 9) The machine is in descaling mode now (both coffee buttons blinking fast on core units). 10) Press any button on a core unit to start pumps. Let the entire solution in the tank run through the system. 11) After water tank is empty, pour descal­ ing solution from both containers back into water tank.
Danger of injury! Hot splashes of descaling solution. Do not open handles dur­ ing descaling process. 46 Citiz service manual o
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12) Place empty containers back on cup supports. 13) Descale again: press any button on a core unit and wait until water tank is empty. 14) Empty containers and put them back on cup supports. 15) Rinse and clean water tank thoroughly and fill it with fresh potable water. 16) Rinse coffee machine by pressing any button on first core unit. 17) Repeat procedure on second core unit and wait until water tank is empty.
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18) Press both coffee buttons simultane­ ously for at least 3 sec to end descal­ ing mode. 19) Repeat procedure on second core unit to end descaling mode. 20) Remove and empty containers. 48 Citiz service manual 21) Switch off coffee machine. 22) Empty and clean capsule/waste water containers and drip tray. 23) Clean coffee machine with a damp cloth if necessary.
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Measure / repair work Further measures / repair work YES ­ replace housing parts if 1.1 Housing parts bro­ necessary ken or damaged NO ­ continue 1 Check the coffee machine for visi­ YES ­ replace power cord ble damage 1.2 Power cord dam­ NO ­ connect power cord of aged machine to the mains and con­ tinue YES ­ check if the capsule and YES ­ replace damaged or 2.1 Cup support does waste water container are cor­ deformed capsule container not remain in verti­ rectly inserted and mounted and/or waste water container. cal position NO ­ continue YES ­ check if 2 rubber stop­ NO ­ replace stoppers 2.2 Cup support rattles pers are mounted on waste when folded down water container NO ­ continue YES ­ it is very difficult or YES ­ replace the compact almost impossible to close the brewing unit 2.3 Closing handle handle and to press it all the malfunction way down 2 Check mechani­ NO ­ continue cal components YES ­ check if damper is NO ­ replace damper 2.4 Closing handle ­ mounted underneath closing unusual noise dur­ handle ing actuation NO ­ continue YES ­ replace brewing unit 2.5 Capsule is not (TMBU) ejected correctly NO ­ continue 2.6 Seal on capsule YES ­ replace brewing unit cage is damaged (TMBU) (check seal with NO ­ continue your finger) YES ­ replace water tank 3 Fill water tank 3.1 Water tank leaks NO ­ continue a) YES ­ power cord is okay YES ­ continue (loose connection) NO ­ replace power cord b) YES ­ On/Off switch is okay YES ­ continue NO ­ replace On/Off switch c) YES ­ pump works (press a YES ­ continue with point f) coffee button) NO ­ continue with point d) d) YES­ both coffee buttons YES ­ continue are working NO ­ replace electronic control 4.1 Coffee machine is board not working 4 Activate On/Off e) YES ­ thermostat on pump is YES ­ replace thermostat (does not function) switch to perform defective NO ­ replace pump automatic self test f) YES­ fine wire fuse(s) YES ­ replace electronic con­ (167 °C) on thermoblock defec­ trol board, if necessary replace tive thermoblock NO ­ continue g) YES ­ wiring is okay YES ­ replace electronic con­ NO ­ continue with point 4.3 trol board NO ­ replace defective cables YES ­ thermoblock is hot YES ­ replace NTC tempera­ 4.2 Both coffee buttons NO ­ self test ok ­ continue ture sensor are blinking 3x fast NO ­ replace thermoblock
Citiz service manual After an initial inspec­ tion in accordance with this check list, errors are quickly found and corrected with the appropri­ ate measure. Therefore, adhere to the sequence of the check list. Repair every occurring error and work the check list through until it is completed. e
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YES ­ a) water system is empty YES ­ replace self priming device (APD) NO ­ continue YES ­ b) flow meter blocked YES ­ clean or replace NO ­ continue 5.1 No coffee YES ­ c) pyramide plate YES ­ replace the compact blocked brewing unit 5 Measure coffee NO ­ continue temperature dur­ YES ­ d) coffee machine is cal­ YES ­ descale coffee machine ing preparation cified (see page 41) (see page 136) NO ­ continue YES ­ descale coffee machine 5.2 Temperature is too (see page 41) low (below 83°C) NO ­ continue YES ­ replace NTC tempera­ 5.3 Temperature too ture sensor high (over 89 °C) NO ­ continue YES ­ replace compact brew­ 6.1 Compact brewing ing unit unit leaks NO ­ continue 6 Check for leakage (see page 133) YES ­ replace defective hoses 6.2 Hose connections and measure flow and seals leak rate (see page NO ­ continue 132) YES ­ coffee machine is calci­ YES ­ descale coffee machine 6.3 Rate of flow not in fied (see page 41) the standard range NO ­ continue with point 9 NO ­ replace pump YES ­ descale coffee machine 7 Descale coffee 7.1 Coffee machine is machine (see page 41) calcified (if necessary) NO ­ continue with point 9 YES ­ descale and rinse coffee YES ­ inform customer to des­ 8 Check water tank 8.1 Particles of calcium machine again to clean water cale coffee machine periodi­ contents after des­ and rust visible in circuit (see page 41) cally and to use specified des­ water caling and rinising NO ­ continue caling product only. No errors found according to YES ­ for more information 9 Final cleaning check list? please contact Nespresso (see page 38) Service Division End of check list 50 Citiz service manual o
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7.2 Check list for milk frother YES ­ inform customer how to clean milk frother The milk frother is part of the Citiz & milk model. e
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1.1 Lid/seal broken or YES ­ replace lid/seal damaged NO ­ continue 1 Check milk frother YES ­ replace milk frother in 1.2 Inside coating of and accessory for agreement with customer jug badly scratched visible damage NO ­ continue 1.3 Whisks broken or YES ­ replace whisks damaged NO ­ continue YES ­ a) coffee machine is heating up 4.1 Milk frother is not 4 Place milk frother working (does not YES ­ b) connector on platform on platform con­ function) is ok (test it with another milk nector. frother) Attach whisk. Switch on coffee 4.2 Abnormal noise YES ­ replace milk frother machine. during preparation NO ­ continue Press start button 4.3 Milk frother does YES ­ replace milk frother briefly (hot milk not switch off auto­ NO ­ continue preparation). matically 4.4 Inside of jug stays YES ­ replace milk frother cold NO ­ continue 5 Press start button YES ­ replace milk frother for at least 2 sec 5.1 Start button is not (cold milk prepa­ backlighted in blue ration) No errors found according to 6 Final cleaning check list? (see page 40) Further measures / repair work de
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Check YES ­ continue NO ­ continue with check list for coffee machine YES ­ replace milk frother NO ­ replace connector on plat­ form (see page 73) YES ­ for more information please contact Nespresso Service Division End of check list
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8 As a rule, identical components (e.g. pumps, thermoblocks etc.) are presented in detail only once. e
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These repair instructions ­ are based on exploded drawings with position numbers combined with repair and mounting tips, ­ presuppose basic knowledge in repairing Nespresso coffee machines. 8.1 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 (ther­ moblock in particular). Let coffee machine cool down before disassembly.
8.2 Repair and mounting tips These general advices are completed with specific repair tips in this chapter. Additional information For components not mentioned in this repair chapter, refer to the chapters "Explosion Drawings" on page 148 and "Parts List" on page 154. Snap connections Parts of the case and components of the coffee machine are connected screwless with latches. When loosening these latches, proceed with care and patience to avoid causing any damage. The side panels of the core unit have delicate snap connections that can brake easily. When removing these side panels, use the special disassembly tool and procceed according to the disassembly instructions. Screw connections Do not overtighten screws. Plastic threads and inserts are delicate. Observe max. torque for the screw connections according to the following table. 52 Citiz service manual o
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R E P A I R S Torque Position TX 10 screw / thermoblock support (central) 150 (+30/­0) Ncm 1.5 (+0.3/­0) Nm NTC fixation on thermoblock 80­100 Ncm 0.8­1.0 Nm TX 20 screw (2 x) / thermo fuse fixations on ther­ moblock 150 (+30/­0) Ncm 1.5 (+0.3/­0) Nm
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50 (+30/­0) Ncm 0.5 (+0.3/­0) Nm w
TX 10 screw (4 x) / brewing unit (TMBU) w
50 (+30/­0) Ncm Bottom of platform 0.5 (+0.3/­0) Nm w
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Screw / screw connection Citiz service manual 53 o
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Screw / screw connection Position
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TX 20 screw / ground connection (PE) on ther­ moblock Designation of spare parts The components in the following illustrations are indexed with position numbers. See separate spare parts list for corresponding spare part numbers. Distinguish between spare parts of the different models and core unit versions. Electrostatic discharge protection When installing a new electronic control board, the service technician must be earthed with a grounding band. Wiring arrangement Random changes in the wiring arrangement during a repair can cause ­ electromagnetic interferences, ­ squeezed wires, ­ insulation defects due to contact with hot parts, ­ insulation problems if low and high voltage wires are not separated. Protective measures: • Do not change the course of internal wiring during repair. • Make sure that wires are distant from hot parts ­ use existing cable ducts and clips. Residual water 54 • If it is necessary to pull off hoses from components, hold ready a small beaker and a towel to collect and wipe away leaking water. • A special procedure is necessary to empty the fluid system of the coffee machine for repair or shipment (refer to "Empty water system" on page 37). Citiz service manual o
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With the following assortment of tools, all repairs described can be made: 1) Special screwdriver with short oval bit (EFR no. 0004872) 2) Short oval bit only (EFR no. 0004878) 3) Disassembly tool (for side panels etc.) (EFR no. 0060611) 4) Repairing/service holder device for models Citiz and Citiz & milk (availa­ ble from Nespresso) 5) Repairing/service holder device for model Citiz & Co (available from Nes­ presso) 6) TORX screwdriver (TX10, TX15) 7) Screwdriver with approx. 4 mm tool tip 8) Hexagonal wrench SW 4 9) Flat wrench SW 14, 10 mm AF 10) Torque wrench 11) Long­nosed pliers 12) Flat pliers 13) Beaker and towel to catch and wipe away leaking water
Citiz service manual A dynamometric screwdriver with suit­ able bits is recom­ mended. 55 d
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56 Take away all removable parts from platform and core unit ­ cup support (8) with waste water container (6) ­ capsule container (7) ­ drip tray (46) with drip grid (49) ­ water tank (44) with cover (45).
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This general disassembly ­ is necessary before the removal/disassembly of a core unit is possible, ­ gives access to the components and wiring of the platform. w
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• Loosen 2 screws (41, oval shaped head) at the bottom side of platform. • Use screwdriver to release latches. Start by inserting the srewdriver in the opening for the power cord. The bottom cover (51) is inserted into the platform with both edges of its small end. Only remove bottom cover by swinging up the round end.
• Remove bottom cover (51) by swinging it up like shown. Citiz service manual 57 d
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• Check if 2 rubber stoppers are mounted on waste water container (6). • Insert bottom cover (51) with small end into platform at first. Then fold it down and close latches. Take care not to jam any wires at the screw connections.
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8.4.2 Replacing water tank connector w
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The water tank con­ nector (53) is replaced together with gasket, clamping ring and metal sieve.
• Pull off both hoses from water tank connector (53). • Release the 3 latches around the water tank connector one after the other by pressing the top of their hooks outwards with a screwdriver (see detail) and lifting the water tank connector at the same time. • Remove gasket (a) from water tank connector (53). • With the help of a pair of tweezers, remove clamping ring (b) and metal sieve (c). • Clean or replace parts. Citiz service manual 59 d
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• Check that gasket is inserted in water tank connector (53) correctly. • During assembly of the water tank connector on the platform, each of its 3 latches has to engage with an audible click. • Mind the different diameters of hoses for the water tank connector. 8.4.3 Replacing mains switch The hoses can remain on the water tank connector. • Remove water tank connector from platform first (see page 59). Use a pair of flat pli­ ers to pull off insulat­ ing sleeve with recep­ • Remove both insulated faston receptacles from mains switch (54). • Press blade of screwdriver between holder of mains switch and platform carefully. Lift holder with screwdriver slightly. Then press holder with mains switch (54) inwards until it can be removed. tacle.
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• Use marked cable guide to lay wires. • The mains switch holder (54) has a notch: correct fitting position is with mains switch connections next to the platform (see detail). • During assembly of the water tank connector (53) on the platform, each of its 3 latches has to engage with an audible click.
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8.4.4 Replacing power cord e
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The hoses can remain on the water tank connector. • Remove water tank connector from platform first (see page 59). Use a pair of flat pli­ ers to pull off insulat­ ing sleeve with recep­ tacle. • Remove insulated faston receptacle of phase wire from mains switch (54). • Disconnect adapter plug of neutral wire (15). The flat receptacle on the ground wire has a special connector latching (see detail). Press down lever at first, then pull off receptacle. • If present, disconnect ground wire (15, see detail). The cable bracket is under tension. There­ fore, hold the cable bracket with your finger when unlatching it.
• Unlatch cable bracket (56) with screwdriver. 62 Citiz service manual o
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Wiring with two­core power cord: w
Wiring with three­core power cord: m
Assembly checkpoints • Use marked cable guides to lay wires. • Check wiring (see "Wiring diagrams ­ model Citiz" on page 118 and following). • During assembly of the water tank connector (53) on the platform, each of its 3 latches has to engage with an audible click.
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8.4.5 Removing core unit e
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Pay attention to the following safety advice before removing the core unit. Danger of insulation damages (cuts) on wires between core unit and platform (phase and neutral wire, ground wire if existing). The sharp casing edges of the platform (marked red in above illustra­ tion) can damage the insulation of wires. Do not stretch and reciprocate wires over sharp edges while removing the core unit.
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• Loosen 4 screws (41, oval shaped head) at the bottom side of platform. For complete removal of the core unit proceed as follows: • Remove water tank connector (53) from platform (see page 59). • Remove insulated faston receptacle of phase wire (15) from mains switch (54). • Disconnect adapter plug (15) of neutral wire. • If present, disconnect ground wire (15, part of thermoblock assembly). Citiz service manual After this repair step the core unit can be pulled out of the plat­ form slightly (with still con­ nected hoses and wires). Now the covers of the core unit can be removed. The hoses can remain on the water tank connector. Use a pair of flat pliers to pull off insulating sleeve with recepta­ cle. The flat receptacle on the ground wire has a special connector latching (see detail). Press down lever at first, then pull off receptacle.
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66 • All covers are assembled on the core unit. • Check that wiring between core unit and platform is led through cable fixation (71). • Use marked cable guides to lay wires in platform (refer to "Replacing power cord" on page 62 and following). • Check wiring (see "Wiring diagrams ­ model Citiz" on page 118 and following). • During assembly of the water tank connector (53) on the platform, each of its 3 latches has to engage with an audible click.
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8.5 Platform disassembly ­ model Citiz & milk w
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8.5.1 General disassembly Take away all removable parts from platform and core unit ­ cup support (8) with waste water container (6) ­ capsule container (7) ­ drip tray (48) with drip grid (49) ­ water tank (44) with cover (45) ­ milk frother (59) with lid and seal (62) ­ cup storage (58) ­ whisk for hot milk (60) ­ spring whisk for milk foam (61).
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• 68 At the bottom side of platform loosen 4 screws (41, oval shaped head).
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Latches on the bot­ tom cover (51) are red circled for easy identification.
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• Insert screwdriver into recesses and swivel screwdriver to remove bottom cover (51). Citiz service manual 69 d
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• Check if 2 rubber stoppers are mounted on waste water container (6). Risk of damage! While assembling the protective cover at the platform, take care not to jam any wires at the screw connections.
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8.5.2 Replacing water tank connector w
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The water tank con­ nector (53) is replaced together with gasket, clamping ring and metal sieve.
• Pull off both hoses from water tank connector (53). • Release the 3 latches around the water tank connector one after the other by pressing the top of their hooks outwards with a screwdriver (see detail) and lifting the water tank connector at the same time. Citiz service manual 71 d
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1. Remove gasket (a) from water tank connector (53). 2. With the help of a pair of tweezers, remove clamping ring (b) and metal sieve (c). 3. Clean or replace parts. Assembly checkpoints 72 • Check that gasket is inserted in water tank connector (53) correctly. • During assembly of the water tank connector on the platform, each of its 3 latches has to engage with an audible click. • Mind the different diameters of hoses for the water tank connector.
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8.5.3 Replacing milk frother connector e
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• Remove 3 small faston receptacles from milk frother connector (57). • Remove milk frother connector (57) by releasing 2 latches and swivel connector out from under the hook. Assembly checkpoints • Use marked cable guides to lay wires. • Check wiring of milk frother connector (57), see detail.
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8.5.4 Replacing mains switch e
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Use a pair of flat pli­ ers to pull off insulat­ ing sleeves with receptacles.
• Remove 4 insulated faston receptacles from mains switch (54). • Press blade of screwdriver between holder of mains switch and platform carefully. Lift holder with screwdriver slightly. Then press holder with mains switch (54) inwards till it can be removed. Assembly checkpoints 74 • The mains switch holder (54) has a notch (see detail) to ensure a correct fitting posi­ tion. • Use marked cable guides to lay wires. • Check wiring of mains switch (see "Wiring diagrams ­ model Citiz & milk, EF 485/ 486" on page 124 and following). Citiz service manual o
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8.5.5 Replacing power cord e
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• Remove 2 insulated faston receptacles (55) from mains switch (54). Use a pair of flat pli­ ers to pull off insulat­ ing sleeve with recep­ tacle. • If present, disconnect ground wire (15, part of thermoblock assembly). The counterpart, a flat receptacle, has a special connector latching (see detail). Press down lever at first, then pull off receptacle. • Unlatch cable bracket (56) with screwdriver. The cable bracket is under tension. There­ fore, hold the cable bracket with your finger when unlatching it.
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76 • Use marked cable guides to lay wires. • Check wiring of power cord (see "Wiring diagrams ­ model Citiz & milk, EF 485/486" on page 124 and following).
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8.5.6 Removing core unit e
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Pay attention to the following safety advice before removing the core unit. Danger of insulation damages (cuts) on wires between core unit and platform (phase and neutral wire, ground wire if existing). The sharp casing edges of the platform (marked red in above illustra­ tion) can damage the insulation of wires. Do not stretch and reciprocate wires over sharp edges while removing the core unit.
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After this repair step the core unit can be pulled out of the plat­ form slightly (with still con­ nected hoses and wires). Now the covers of the core unit can be removed. • Loosen 4 screws (41, oval shaped head) at the bottom side of platform. For complete removal of the core unit proceed as follows: Use a pair of flat pli­ ers to pull off insulat­ ing sleeve with recep­ • Remove bottom cover (refer to page 56). • Remove both insulated faston receptacles (15, part of thermoblock assembly) from mains switch (54). tacle.
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• The flat receptacle on the ground wire has a special connector latching (see detail). Press down lever at first, then pull off receptacle.
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• Assembly checkpoints • All covers are assembled on the core unit. • Check that wiring between core unit and platform is led through cable fixation (71). • Use marked cable guides to lay wires. • Check wiring of milk frother connector (57), see detail. • Check wiring of mains switch (54), see "Wiring diagrams ­ model Citiz & milk, EF 485/486" on page 124 and following. • During assembly of the water tank connector (53) on the platform, each of its 3 latches has to engage with an audible click. Citiz service manual 79 d
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8.6 Platform disassembly ­ model Citiz & Co de
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This general disassembly ­ is necessary before the removal/disassembly of one or both core units is possible, ­ gives access to the components and wiring of the platform. • 80 Take away all removable parts from platform and core units ­ cup supports (8) with waste water containers (6) ­ capsule containers (7) ­ drip tray (48) with drip grid (49) ­ water tank (44) with cover (45).
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• At the bottom side of platform loosen 9 screws (41, oval shaped head). Citiz service manual The core units are fastened with some of these screws as well. Support both core units so that their remaining screw connection to the platform cannot be damaged.
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• 82 If necessary use a screwdriver to remove protective cover (51).
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• Check if 2 rubber stoppers are mounted on each waste water container (6). Risk of damage! While assembling the protective cover at the platform, take care not to jam any wires at the screw connections.
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The water tank con­ nector (53) is replaced together with gasket, clamping ring and metal sieve.
• Pull off both hoses (63, 64) from water tank connector (53). • Release the 3 latches one after the other by pressing the top of their hooks outwards with a screwdriver (see detail) and lifting the water tank connector at the same time. • Remove gasket (a) from water tank connector (53). • With the help of a pair of tweezers, remove clamping ring (b) and metal sieve (c). • Clean or replace parts. Citiz service manual o
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• During assembly of the water tank connector (53) on the platform, each of its 3 latches has to engage with an audible click. • Insert gasket correctly (see detail). 8.6.3 Replacing mains switch • Remove 2 insulated faston receptacles from mains switch (54). • Press blade of screwdriver between holder of mains switch and platform carefully. Lift holder with screwdriver slightly. Then press holder with mains switch (54) inwards till it can be removed. Citiz service manual Use a pair of flat pli­ ers to pull off insulat­ ing sleeves with receptacles.
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86 • Use marked cable guides to lay wires. • The mains switch holder (54) has a notch: correct fitting position is with mains switch connections next to the platform (see detail).
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8.6.4 Replacing power cord e
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Use a pair of flat pli­ ers to pull off insulat­ ing sleeve with recep­ tacle. • Remove insulated faston receptacle of phase wire (55) from mains switch (54). • Disconnect both insulated adapter plugs of neutral wire (55). • If a ground wire is present, disconnect both flat receptacles (15). The flat receptacles of the ground wire connections (15) have a special connector latching (see detail). Press down lever at first, then pull off receptacle. • Unlatch cable bracket (56) with screwdriver. The cable bracket is under tension. There­ fore, hold the cable bracket with your finger when unlatching it.
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88 • Use marked cable guides to lay wires. • Check wiring of power cord (see "Wiring diagrams ­ model Citiz & Co, EF 487/488" on page 128 and following).
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8.6.5 Removing core units w
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Both core units can be removed the same way. • For each core unit loosen 1 remaining screw (41, oval shaped head) at the bottom side of platform. For complete removal of a core unit proceed as follows: 4. Disconnect 2 insulated adapter plugs (15, phase and neutral wire). 5. If a ground wire (15, part of thermoblock) is present, disconnect flat receptacle. 6. Open protective case (69) with screwdriver and disconnect connection cable (b). 7. Pull out core unit from platform slightly to disconnect synchronization cable plug (a) from electronic control board. 8. Pull off both hoses from angled H­connector (65). 9. Lift core unit out of platform. Citiz service manual After the first repair step the core unit can be pulled out of the platform slightly (with still connected hoses and wires). Now the covers of the core unit can be removed. The flat receptacle on the ground wire has a special connector latching (see detail). Press down lever at first, then pull off receptacle.
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90 • All covers are assembled on the core unit. • Use marked cable guides to lay wires. • Check wiring (see "Wiring diagrams ­ model Citiz & Co, EF 487/488" on page 128 and following). • Make sure to reconnect synchronization cable plugs (a) on electronic control boards. • Mind the hose positions on angled H­connector (65). • Check that wiring between core units and platform is led through cable fixations (71).
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Remove left side panel After general disas­ sembly of the core unit a repairing / service holder device is helpful for further repair work.
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8.7.1 General disassembly 1. Insert disassembly tool between bottom of left side panel (3) and chassis (1). 2. Swivel disassembly tool till latch opens at the bottom. 3. Insert disassembly tool into lower gap at the front. 4. Carefully turn disassembly tool slightly to the right to open the latch. Citiz service manual 91 d
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5. Insert disassembly tool laterally into the gap above. 6. Carefully turn disassembly tool slightly forward to open the next latch. 7. Move disassembly tool upwards and open remaining latch the same way. Insert disassembly tool at right angles only. Otherwise the shadow gap can be dam­ aged.
92 8. At the back insert disassembly tool into shadow gap of left side panel. 9. Swivel disassembly tool carefully to open first latch. 10. Move disassembly tool upwards and open the other two latches the same way. Citiz service manual o
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11. Swing up and remove left side panel. Remove right side panel Remove the right side panel (4) in the same sequence as for the left side panel (3). Remove blind 1. Open 2 latches on each side of blind (9) with screwdriver. 2. Remove blind together with coffee buttons and wiring.
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1. Use a screwdriver to release 2 latches on each side. 2. Lift and remove cover (2). Remove front cover with outlet 1. Release 3 latches on front cover by hand and press out outlet (5, see detail).
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• For easy identification, the side panels are marked with "RIGHT" or "LEFT" on the inside. • Check if damper (10) for closing handle is installed on cover (2). • Check that all connection wires to the platform are led through cable fixation (71).
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8.7.2 Replacing compact brewing unit e
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Open closing handle to get access to hose connection.
96 • Use a pair of pointed pliers to remove connector clip (34) and hose (29) with O­ring (36). • Use Torx screwdriver TX10 to loosen 4 screws (40). • After removal of compact brewing unit (14), release 2 latches with screwdriver and remove steam cover (13). Citiz service manual o
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• At first assemble steam cover (13) on new compact brewing unit (14) as shown. • Replace O­ring (36) of hose connection on compact brewing unit.
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General The pump (18) can only be replaced as assembly consisting of ­ pump, prewired with thermostat (19, see below) or thermal cut off fuse (a) ­ 2 pump supports (21, 22) ­ pump cover (25). The pump is equipped either with a thermal cut off fuse or a thermostat depending on the voltage range or manufacturer. a) Thermal cut off fuse 19) Thermostat with retaining clip
A blown thermal cut off fuse (a) has to be replaced together with the pump assembly. A tripped thermostat (19) resets after about 30 min automatically. 98 Citiz service manual o
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• Remove both hoses (28, 32) from pump. Use a pair of pointed pliers to remove connector clip (35) with O­ring (36). • Remove cover (43) from electronic control board and disconnect 2 faston recepta­ cles of pump wires. • Pull out supports (21, 22) together with complete pump assembly.
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Assembly checkpoints e
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The white plastic Iid on the pump is rotata­ ble and has a square seat for the fork wrench.
100 • Adjust position of pump connector (23) towards hose (28) if necessary. • Check condition of supports (21, 22). Replace brittle supports. • Pass hose (28) from pump to self priming device through lug on pump cover (25). • Use a cable clamp (a) to fix pump wires (different location depending on thermo fuse/thermostat). Citiz service manual o
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8.7.4 Replacing flow meter e
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Assembly checkpoint • Lay connection cable to flow meter (27) in bracket. • Mind the hose positions on the flow meter.
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8.7.5 Replacing automatic priming device (APD) e
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• 102 Use a pair of pointed pliers to remove connector clips (34, 35) from automatic priming device (26).
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Assembly checkpoints e
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• Replace both O­rings (36) together with automatic priming device (26). • Insert hose (28) in tube guiding (30).
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8.7.6 Replacing thermoblock with NTC sensor and fine wire fuse(s) 104 A defect thermoblock can only be replaced with an assembly consisting of ­ thermoblock, prewired with NTC temperature sensor, fine wire fuse(s) and ground wire (only if required), ­ thermoblock support. • Use Torx screwdriver TX10 to loosen screw (40). • Release 3 latches and pull out support with thermoblock assembly (15). Citiz service manual e
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Do not stress NTC cable when remov­ ing support.
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Depending on national regulations, one or two fine wire fuses are mounted on the thermoblock (see “Wiring diagrams” on page 118 and following). o
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Replacing NTC temperature sensor e
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• Unplug NTC sensor cable from electric control board (42) first. • Test NTC temperature sensor (39), see “NTC temperature sensor functionality” on page 139. Assembly checkpoint ­ NTC temperature sensor • Tighten the new NTC temperature sensor (39) and spring ring with a torque wrench (80 ­ 100 Ncm). Replacing fine wire fuse(s)
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Assembly checkpoints ­ fine wire fuse(s) w
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When mounting a safety clip (a) on the thermoblock (15), make sure that the housing of the fine wire fuse (b) is positioned exactly below the safety clip. • Tighten fastening screw and spring ring with a torque wrench (150 (+30/­0) Ncm). Assembly checkpoints ­ thermoblock 106 e
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• • All wires from thermoblock to platform must be led through the bracket (a) at the bottom of the support. • The black grommets (b) on the electrical thermoblock connections are slitted at the end. If an angled Faston receptacle (c) is used, make sure that its wire runs through this slit. • Tighten central fastening screw (d) with a torque wrench (150 (+30/­0) Ncm).
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8.7.7 Replacing electronic control board with button prints w
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The replacement board is equipped with protective hous­ ing and cover.
• Remove at first ­ NTC connector from electronic control board, ­ connector cable from flow meter, ­ electronic lid (43), ­ faston receptacles from electronic control board. • Insert tip of screwdriver between chassis (1) and protective case of electronic control board (42) to release latches. Then pull out assembly. Citiz service manual 107 d
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Assembly checkpoints For installing and connecting a new electronic control board, the service techni­ cian must be earthed with a grounding band.
108 • After assembly check the plug arrangement of the electronic control board (see “Wiring diagrams” on page 118 and following. • Lay connection wires to button prints in brackets and cable guide like shown. Citiz service manual o
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8.8 Disassembly of core unit, D­range w
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Remove outlet 1. Open closing handle. 2. Press outlet (5) sidewards by hand carefully. 3. Insert disassembly tool into gap between outlet and right side panel (4). Citiz service manual After general disas­ sembly of the core unit a repairing/serv­ ice holder device is helpful for further repair work. e
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8.8.1 General disassembly The disassembly tool is necessary for removing outlet and side panels undamaged.
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4. 5. 6. 7. 8. Hold and pull outlet. At the same time move disassembly tool upwards. Carefully turn disassembly tool slightly backward to open the latch. Insert disassembly tool into gap on the other side of the outlet. Move disassembly tool upwards and carefully turn it slightly backward to open the latch. 9. Remove outlet. Remove right side panel 10. Insert disassembly tool between bottom of right side panel (4) and chassis. 11. Swivel disassembly tool till snap connection at the front opens. 12. Relocate disassembly tool and repeat procedure to open latch at the bottom of the side panel.
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13. Insert disassembly tool laterally into gap at the front. 14. Carefully turn disassembly tool slightly forward to open the first latch. 15. Move disassembly tool upwards and open the other two latches the same way. 16. At the back insert disassembly tool into shadow gap of right side panel. 17. Swivel disassembly tool carefully to open first latch. 18. Move disassembly tool upwards and repeat procedure for the other 2 latches. Citiz service manual Insert disassembly tool at right angles only. Otherwise the shadow gap can be dam­ aged.
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Closing handle must be opened.
19. Swing up and remove right side panel. Remove left side panel 20. Insert disassembly tool between bottom of left side panel (3) and chassis. 21. Swivel disassembly tool till latch at the front opens. 22. Relocate disassembly tool and repeat procedure to open latch at the bottom of the side panel. 112 Citiz service manual o
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23. Insert disassembly tool laterally into gap at the front. 24. Carefully turn disassembly tool slightly forward to open the first latch. 25. Move disassembly tool upwards and open the other two latches the same way. 26. At the back insert disassembly tool into shadow gap of left side panel. 27. Swivel disassembly tool carefully to open first latch. 28. Move disassembly tool upwards and repeat procedure for the other 2 latches. Citiz service manual Insert disassembly tool at right angles only. Otherwise the shadow gap can be dam­ aged.
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Closing handle should be opened.
29. Swing up and remove left side panel. Remove cover (2) 1. Remove both coffee buttons (11, 12) and prints (42) out of holder. 2. Remove wiring of coffee button prints from cable guides. 114 Citiz service manual o
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3. Use a screwdriver to release 4 latches. 4. Open closing handle. 5. Lift and remove cover (2). Assembly checkpoints • Check if damper (10) for closing handle is installed on cover (2). • For correct layout of the wires to the coffee button prints, see “Replacing electronic control board with button prints” on page 116. • Assemble left side panel (3) first. • Insert right side panel (4) into hinges at the top of the left side panel. Then fold down right side panel and click latches. • Check that all latches are engaged.
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8.8.2 Replacing electronic control board with button prints e
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• Refer to page 114 for removing cover (2). The replacement board (42) is equipped with protec­ tive housing and cover.
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Remove first ­ NTC connector from electronic control board, ­ connector cable from flow meter, ­ electronic lid (43), ­ faston receptacles from electronic control board. • Insert tip of screwdriver between chassis (1) and protective case of electronic control board (42) to release latches. Then pull out assembly. m
• The left and right button prints (42) are marked with "L" or "R" for easy identification. • After assembly check the plug arrangement of the mainboard (see “Wiring diagrams” on page 118 and following). • Lay connection wires to button prints in brackets and cable guides like shown. Citiz service manual e
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Assembly checkpoints For installing and connecting a new electronic control board, the service techni­ cian must be earthed with a grounding band.
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8.9 Wiring diagrams e
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Wiring diagram 220 V ­ 240 V IEC ­ model Citiz, EF 483/484
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8.9.1 Wiring diagrams ­ model Citiz 118 Citiz service manual o
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Wiring diagram 120 V UL (USA/Canada) ­ model Citiz, EF 483/484
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Wiring diagram 120 V ­ 127 V IEC (Brazil) ­ model Citiz, EF 483/484
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120 Citiz service manual o
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Wiring diagram 120 V ­ 127 V IEC (Mexico) ­ model Citiz, EF 483/484
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Wiring diagram 110 V IEC (Taiwan) ­ model Citiz, EF 483/484
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122 Citiz service manual o
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Wiring diagram 100 V IEC (Japan) ­ model Citiz, EF 483/484
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8.9.2 Wiring diagrams ­ model Citiz & milk, EF 485/486 w
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Wiring diagram 220 V ­ 240 V IEC ­ model Citiz & milk, EF 485/486
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Wiring diagram 120 V UL (USA/Canada) ­ model Citiz & milk, EF 485/ 486
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Wiring diagram 120 V ­ 127 V IEC (Brazil) ­ model Citiz & milk, EF 485/ 486
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Wiring diagram 120 V ­ 127 V IEC (Mexico) ­ model Citiz & milk, EF 485/486
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8.9.3 Wiring diagrams ­ model Citiz & Co, EF 487/488 w
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Wiring diagram 220 V ­ 240 V IEC ­ core unit, model Citiz & Co, EF 487/488
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Wiring diagram 220 V ­ 240 V IEC ­ model Citiz & Co, EF 487/488
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Citiz service manual 129 o
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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. e
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9 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. 9.2 Required equipment 9.2.1 Overview Symbolic illustration of function test equip­ ment. 1) Pressure gauge (EFR no. 16195) 2) Citiz pressure gauge adapter 3) Digital multimeter (for NTC temperature sensor test) 130 Citiz service manual 4) Electronic thermometer (or digital multimeter suitable for temper­ ature measurement) 5) Timer 6) Measuring beaker 7) Test equipment for protective earth con­ tinuity test and protective insulation test
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9.2.2 Citiz pressure gauge adapter e
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1) Quick action coupling for pressure hose 2) Operating lever 3) Connecting unit 4) Fixation unit
This pressure gauge adapter is designed for the Citiz coffee machines. The pressure gauge adapter has 2 parts: • A connecting unit (3) with a sealing cone that is inserted in the capsule cage of the brewing unit. • A hand actuated fixation unit (4) to lock and seal the complete pressure gauge adapter in the brewing unit. Citiz service manual 131 d
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9.3 Measure flow rate e
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1) Fill and insert water tank. 2) Open closing handle. The pressure adapter must sit firmly in the capsule bay. 3) Insert connecting unit of pressure adapter into capsule bay. Push back sealing cone into capsule cage. 4) Insert fixation unit of pressure adapter into capsule bay. 5) Press down operating lever. 6) Connect pressure hose to pressure tester. 7) Place a measuring cup under the drain hose of the pressure tester.
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8) Switch on coffee machine. 9) After heating up, press the "small cup" button. 10) Open the valve until water begins to flow. 11) Close the valve until the pressure gauge indicates 12 bar. e
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Constantly monitor the pressure gauge and if required readjust the valve. As the temperature increases, so does the pressure, readjust the pressure to 12 bar when required. 12) Carry out measurement for approx. 30 sec. 13) Control measuring cup: at least 60­ 120 ml of water must be in the measur­ ing cup. 14) Open the valve and let water flow out of the pressure tester. Notices: • Should < 60 ml leak out, then the pump is defective or there is a leak in the water system. • Large deviations in indicated pressure while measuring (± 4 bar) means that the pump is defective. 9.4 Pressure and leakage checks Check the following parts of the coffee machine for leakages: • Compact brewing unit • Hose connections • Thermoblock • Pump • Self priming device Dangerous mains voltage inside the coffee machine! Do not touch any parts under voltage while checking for leakages! Dangerous hot parts under pressure inside the coffee machine! Do not touch any hot/pressurized parts while checking for leakages! Always wear protective goggles.
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9.4.1 Preparations w
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1) Remove left side panel of core unit. 2) Insert core unit back into platform. 3) Fill and insert water tank. The pressure adapter must sit firmly in the capsule bay. 4) Insert connecting unit of pressure adapter into capsule bay. Push back sealing cone into capsule cage. 5) Insert fixation unit of pressure adapter into capsule bay. 6) Press down operating lever. 7) Connect pressure hose to pressure tester. 8) Place a measuring cup under the drain hose of the pressure tester.
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Depending on core unit range, refer to "Disassembly of core unit, C­range" on page 91 or "Disassembly of core unit, D­range" on page 109. o
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9) Connect mains cable. 10) Switch on coffee machine. 9.4.2 Test run 11) After heating up, press the "small cup" button. 12) Open the valve and let the water flow for approximately 10 sec out of the drain hose. 13) Close the valve completely. The pres­ sure stabilizes after increasing briefly between 16­19 bar (pressure check). The pressure increases slowly with increasing temperature. Should the pressure exceed 23 bar, switch off the coffee machine and release the pressure by opening the valve. For better visibility use a flashlight. 14) Check all connections under pressure for audible and visible leaks. Do not run the pump for more than 50 sec with the valve closed.
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15) Switch off the coffee machine. 16) Open the valve and let water flow out of the pressure tester. 9.5 Measure coffee temperature 1) Switch on coffee machine. 2) Place a measuring cup on cup sup­ port.
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3) After heating up, press the "small cup" button for approximately 10 sec to pre­ heat the coffee outlet with hot water. 4) Empty measuring cup and place it back on cup support. 5) Insert capsule (Cosi is best suited). 6) Press the "small cup" button again. 7) Wait until the measuring cup contains 20 ml of coffee. 8) Then measure the coffee temperature approx. 5­10 mm under the coffee out­ let. The coffee temperature should be 86 °C ± 3 °C (187 °F ± 5.4 °F).
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9.6 Milk frother tests w
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Use newly opened UHT, full fat or semi­skimmed milk at fridge temperature (+ 8 °C till + 10 °C) for the following tests only. 9.6.1 Measure hot milk temperature e
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Prerequisite Spattered milk may cause burns. Only use milk frother with lid. • Prepare 240 ml hot milk in milk frother (use mixer without spring). • Measure temperature immediately after preparation in jug. The milk temperature should be between + 60 °C and + 70 °C (140 °F till 158 °F). 9.6.2 Measure milk froth ratio • Prepare cold milk froth out of 120 ml milk in milk frother (use whisk with spring). • Empty content of milk frother into measuring beaker. • Determine the ratio x [%] of milk froth to liquid milk with following formula: 2 H 1
x = H
­­­­­­­­­­­­­­­­­­­­­ ´ 100
H 1 Approximate values: direct after preparation .....................................................................................x = 250 60 sec after preparation ....................................................................................x = 190 138 Citiz service manual o
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9.7 NTC temperature sensor functionality e
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An easy way to check the functionality of the NTC temperature sensor is to measure the ohmic resistance at ambient temperature. With this measurement, most defect NTC temperature sensors can be detected. w
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The resistance of the NTC temperature sensor must be within a defined range, other­ wise the temperature regulation will not work properly and the coffee machine will stay/ go into failure mode. Avoid contamination of sensor contact sur­ face during handling. 1) Unplug NTC temperature sensor from electronic control board. 2) Remove NTC temperature sensor from thermoblock (refer to page 104 and following). 3) Measure temperature of sensor body (do not touch either temperature or NTC sensor by hand). 4) Measure resistance of NTC tempera­ ture sensor by connecting a multime­ ter at the plug. 5) Compare measuring values with fol­ lowing diagram or table.
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NTC Diagram e
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NTC temperature sensor, R/T characteristics Graph 1 ........................................................................................ max. resistance value Graph 2 ......................................................................................... min. resistance value Measurement table NTC temperature [°C] 15 20 25 30 35 140 Citiz service manual NTC temperature [°F] 59 68 77 86 95 NTC min. resistance NTC max. resistance [kOhm] [kOhm] 155.63 168.48 122.41 131.23 97.00 103.00 76.63 82.12 60.90 65.86
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9.8 Protective earth (PE) continuity test e
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This test is only necessary ­ for class 1 equipment (three­wire power cord with protective earth) ­ for models Citiz & milk, EF 485/486 ­ after a repair whenever a general disassembly of the platform and/or core unit was performed. w
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9.8.1 What coffee machine has to be tested and when? 9.8.2 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 60335­1 “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 and 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 plug and touchable, conductive housing parts ­ the permissible ground resistance of those conductive, touchable parts 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 protec­ tive earth continuity measurements. Detailed requirements and tolerances must be veri­ fied by your local authorities or measurement supplier in any case. Ask Nespresso for recommendations about test equipment.
Test report For legal reasons a repair or test report should be prepared and filed with following infor­ mation ­ 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 Citiz service manual 141 d
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9.8.3 Test sequence w
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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. e
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This test sequence is not applicable for cof­ fee machines with two­wire power cords (with­ out ground pin). 1) Connect black measuring cable to ground pin of power plug with an alli­ gator clip (example shown: Swiss power plug). Symbolic illustration of test equipment. 2) Switch on test equipment and select protective earth continuity test. The coffee machine Citiz & Co has 2 test holes to check both thermoblocks. Test holes on bottom of Citiz / Citiz & milk / Citiz & Co platforms 3) Insert tip of red test probe in test hole and touch thermoblock. 4) Press "measure" button and read off displayed resistance. The resistance must be lower than 0.3 Ohm. 5) Fill in measured value(s) in a test report.
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Do not damage inside coating of milk frother jug with the probe tip. e
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Additional test for coffee machine Citiz & milk: 1) Touch upper metallic part of milk frother with red test probe. 2) Press "measure" button and read off displayed resistance. 3) Repeat measurement on another metallic spot of milk frother for verifica­ tion. The resistance must be lower than 0.3 Ohm. 4) Fill in measured value(s) in a test report.
9.8.4 What to do if the protective earth continuity test fails • Check/measure ground connection in platform (refer to page 75). • Check/measure ground connection on milk frother connector (refer to page 73 and page 124 for wiring diagram). Replace milk frother connector if necessary. • Clean ground contact on milk frother. Measure resistance between ground contact and jug of milk frother. Replace milk frother if necessary. Citiz service manual 143 d
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9.9 Protective insulation test w
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9.9.1 What coffee machines have to be tested and when? e
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This test is necessary ­ for class 1 and 2 equipment (with/without protective earth) ­ after a repair whenever a general disassembly of the platform and/or core unit was performed. 9.9.2 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 60335­1 “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 require­ ments 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 Ask Nespresso for recommendations about test equipment.
Special test equipment is needed that complies with the regulations to perform insula­ tion and withstanding voltage tests. Detailed requirements and tolerances must be veri­ fied 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. Test report For legal reasons a repair or test report should be prepared and filed with following infor­ mation ­ 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 144 Citiz service manual o
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9.9.3 Test sequence e
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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. w
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Danger of electrical shock/short circuit! Do not plug in the coffee machine during insulation test. A Swiss power plug is shown here as an example. 1) Connect the phase and neutral pin of the power plug together with a test adapter (procured by the repair centre). 2) Connect the black measuring cable to the test adapter (see image). 3) Turn the ON­OFF machine's main switch on position I (ON). Use a short circuit plug or special alliga­ tor clips etc. as sub­ stitute for this test adapter. Symbolic illustration of test equipment. 4) Switch on test equipment and select an insulation test voltage of 500 V DC. Some test equipment displays test passed or failed instead of the insulation resistance. 5) Touch closing handle with red test probe. 6) Press "measure" button. 7) Read off displayed insulation resist­ ance or test result. The insulation resistance must be higher than 300 kOhm (300,000 Ohm).
Citiz service manual 145 d
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The coffee machine Citiz & Co has 2 test holes to check both thermoblocks. e
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Test holes on bottom of Citiz / Citiz & milk / Citiz & Co platforms 8) Insert tip of red test probe in test hole and touch thermoblock. 9) Press "measure" button. 10) Read off displayed insulation resist­ ance or test result. The insulation resistance must be higher than 300 kOhm (300’000 Ohm). 11) Switch off test equipment. 12) Short red with black test probe to make sure that test voltage is dis­ charged. 13) Fill in results in a test report. Additional tests for coffee machine Citiz & milk: 1) Touch upper metallic part of milk frother with red test probe. 2) Press "measure" button. 3) Read off displayed insulation resist­ ance or test result.
146 Citiz service manual o
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4) Remove milk frother from platform. 5) Insert red test probe in central opening of milk frother connector (ground con­ nection). 6) Press "measure" button. 7) Read off displayed insulation resist­ ance or test result. 8) Switch off test equipment. 9) Short red with black test probe to make sure that test voltage is dis­ charged. 10) Fill in result in test report. 9.9.4 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 troubleshooting check list (see page 49). • In case of doubt an insultation test on the milk frother alone can be carried out on the coffee machine Citiz & milk: touch phase and neutral contacts at the bottom with one test probe successively and the metallic upper part with the other test probe. If insulation test fails, replace milk frother. Citiz service manual 147 d
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10.1Model Citiz, core unit D­range (EF 483)
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1 0 E X P L O S I O N D R A W I N G S 148 Citiz service manual o
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10.2 Model Citiz, core unit C­range (EF 484)
Citiz service manual 149 d
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10.3 Model Citiz & milk, core unit D­range (EF 485)
150 Citiz service manual o
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10.4 Model Citiz & milk, core unit C­range (EF 486)
Citiz service manual 151 d
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10.5 Model Citiz & Co, core unit D­range (EF 487)
152 Citiz service manual o
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10.6 Model Citiz & Co, core unit C­range (EF 488)
Citiz service manual 153 d
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Pos. 7 8 8 9 10 11 12 11 13 14 14 Chassis A Chassis B Cover A Cover B Side panel A left Ivory (old: Creamy White) Side panel A right Ivory (old: Creamy White) Side panel A left Black (old: Piano Black) Side panel A right Black (old: Piano Black) Side panel B left Grey (Slate) Side panel B right Grey (Slate) Side panel B left Red (old: Retro Red) Side panel B right Red (old: Retro Red) Outlet B spare, containing ­ Front Cover (1x) ­ Outlet B chrome (1x) Outlet A Chrome Waste water spare, containing ­ Waste water A+B (1x) ­ Cup support stop (2x) Capsule Container A+B Cup support A Cup support B Blind Damper MBU closing handle Espresso Button A Coffee Button A Coffee Button B Steam Cover TMBU TMBU 15 Thermobloc 230 V 15 Thermobloc 120 V (USA) 15 Thermobloc 120 V (Brasilien/Taiwan) 15 Thermobloc 120 V (Mexico) 15 Thermobloc 230 V 15 Thermobloc 120 V (USA) 15 Thermobloc 120 V (Brasilien/Mexico) 15 Thermobloc 100 V 15 Thermobloc 230 V 5 5 6 154 Citiz service manual Remark e
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1 1 2 2 3 4 3 4 3 4 3 4 Component de
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1 1 P A R T S L I S T Handle A Handle B Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC Complete assembly incl. support, complete wiring (safety), with NTC
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Pos. Pump 230 V 18 Pump 120 V 18 Pump 100 V 18 Pump 127 V IEC 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 33 34 35 36 37 38 39 40 41 42 42 42 42 43 44 44 45 45 46 46 46 46 46 46 47 48 48 Thermostat Clip Thermostat Pump support upside Pump support downside Pump connector 90° O­ring 5, 28 x 1, 78 Pump cover APD Flowmeter FHKSC12 4.5­24VDC, 5­13mA Hose Pump ­ APD Hose TB ­ TMBU Tube guiding Angle hose FM in Angle hose FM Pump Angle hose APD out Angle hose APD out M4 Connector clip 5mm Connector clip 4mm O­ring 3.40 x 1.90 Hose connector 55° Isolation spout angular NTC (Cable length =160 mm) PT Screw Torx K30 x 12 PT Screw Oval K30 x 12 Electronic Control Board M1+3 220­240 V 50/60 Hz Electronic Control Board M1+3 120­127 V 50/60 Hz Electronic Control Board M1+3 100­110 V 50/60 Hz Electronic Control Board M4 220­240 V 50/60 Hz Electronic lid Water tank 1 Water tank 4 Water tank 1 cover Water tank 4 cover Drip tray 1 Drip tray 1 Drip tray 1 Drip tray 1 Drip tray 1 Drip tray 1 Rubber feet (Drip tray 1) Drip tray 3 Drip tray 4 e
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18 Complete assembly incl. support, complete wiring (safety), with NTC Incl. thermostat and both wires, pump cover, pump sup­ ports, 90° angle. Invensys, no Ceme, no Sysko Incl. thermostat and both wires, pump cover, pump sup­ ports, 90° angle. Invensys, no Ceme, no Sysko Incl. thermostat and both wires, pump cover, pump sup­ ports, 90° angle. Invensys, no Ceme, no Sysko Incl. thermostat and both wires, pump cover, pump sup­ ports, 90° angle. Invensys, no Ceme, no Sysko w
Thermobloc 230 V w
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15 Complete (Birdy FS: 5.6V, 4­5mA) new standard Delivery without o­rings (you can loose them) Delivery without o­rings (you can loose them) Also part of TB spare assembly Also part of TB spare assembly Incl. housing Incl. housing Incl. housing Incl. housing Nespresso (inc.rubber feet) Krups (incl. rubber feet) Turmix (incl. rubber feet) DeLonghi (incl. rubber feet) Magimix (incl. rubber feet) Koenig (incl. rubber feet) Citiz service manual 155 o
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Pos. Inc. rubber feet Inc. rubber feet Inc. rubber feet Inc. rubber feet Inc. rubber feet Inc. rubber feet Incl. filter & seal Incl. filter & seal 2­pol 1­pol new marquardt Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation e
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Citiz service manual w
156 Drip Grid A 1 Drip Grid B 1 Drip grid A 3 Drip grid B 3 Drip grid A 4 Drip grid B 4 Base plate 1 top Base plate 3 top Base plate 4 top Base plate 1 bottom Base plate 3 bottom Base plate 4 bottom Rubber feet Water tank connector 1 Water tank connector 4 ON/OFF switch incl. support (spare parts) ON/OFF switch incl. support (spare parts) Power supply cord JP 2pol Connection cable UL 1 Connection cable 230 V country spec. M1 (SEV) Connection cable 230 V country spec. M1 (AU) Connection cable 230 V country spec. M1 (IL) Connection cable 230 V country spec. M1 (UK) Connection cable 230 V country spec. M1 (Cebec) Connection cable 230 V country spec. M1 (AR) Connection cable 230 V country spec. M1 (KR) Connection cable 230 V country spec. M1 (ZA 220 V) Connection cable 230 V country spec. M1 (CN) Connection cable 230 V country spec. M1 (SG) Power supply cord TW 3pol Connection cable 230 V country spec. M1 (BR 220 V) Power supply cord BR 3pol Power supply cord BR 3pol Connection cable UL M3 country spec Connection cable UL US/MX M3 Connection cable 230 V country spec. M3 (ZA) Connection cable 230 V country spec. M3 (BR 220 V) Connection cable 230 V country spec. M3 (UK) Connection cable 230 V country spec. M3 (AR) Connection cable 230 V country spec. M3 (AU) Connection cable 230 V country spec. M3 (SEV) Connection cable 230 V country spec. M3 (CN) Connection cable 230 V country spec. M3 (Cebec) Connection cable 230 V country spec. M3 (IL) Connection cable 230 V country spec. M3 (KR) Connection cable 230 V country spec. M3 (SG) Connection cable 230 V country spec. M4 (SEV) Connection cable 230 V country spec. M4 (Cebec) Connection cable 230 V country spec. M4 (UK) Connection cable 230 V country spec. M4 (AU) Connection cable 230 V country spec. M4 (IL) Connection cable 230 V country spec. M4 (AR) w
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49 49 49 49 49 49 50 50 50 51 51 51 52 53 53 54 54 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 55 o
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Citiz service manual .v
Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation Incl. receptacle and isolation w
Connection cable 230 V country spec. M4 (SG) Connection cable 230 V country spec. M4 (ZA) Connection cable 230 V country spec. M4 (BR­220 V) Connection cable 230 V country spec. M4 (CN) Cable bracket UL 2­pol Cable bracket UL 3­pol Cable bracket IEC 3­pol Otter connector CS7 Cup storage Aeroccino 3 220­240 V 50/60 Hz Aeroccino 3 120­127 V 50/60 Hz Mixer (hot milk) Whisk (foam) Aeroccino Lid incl. seal Angle hose water 4 Angle hose venting 4 Angle hard double M4 Tank snap hook Connection isolation Double Tab 4.8­Sn Cable fixation TB Cover stopper w
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55 55 55 55 56 56 56 57 58 59 59 60 61 62 63 64 65 66 69 70 71 72 157 d
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1 2 N O T E S
158 Citiz service manual 
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