Removing core unit | Nespresso EF487/488, EF485/486, EF483/484

R E P A I R S

8.5.6 Removing core unit

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.

Citiz service manual

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Image 77

Nespresso EF487/488, EF485/486, EF483/484 manual Removing core unit

Contents

Service MA NUA L Citiz Coffee MA Chines Contents Repairs 130 Version Content Upda TESPrefa CE To contact with both cir cuit conductors Genera L SA Fety Notes With core unit Drange With core unit Crange Model OverviewModel range Different components range Core unit versionsrangeCrange Overview core unit, Drange MA in Components Interior view core unit, Drange Overview core unit, Crange Interior view core unit, Crange Overview model Citiz Overview model Citiz & milk Overview milk frother AERO3 Overview model Citiz & Co Fluid System Water circuit diagram of core unit all Citiz versions Water circuit of models Citiz/Citiz & milk Water circuit of model Citiz & Co Rating plates Technica L DA TAExamples of brand specific rating plates Nespresso, EUversion Koenig, CHversion DeLonghi, EUversion Magimix, EUversion Krups, EUversion Turmix, ATversion Rating plate details Example Rating plate of milk frother model Citiz & milkDecoding the alphanumeric serial number Technical data of coffee machines Summary of technical data Pump TemperaturesCapacities Various data Technical data of milk frother model Citiz & milk Performance data Dimensions and weight model CitizTemperature Dimensions and weight milk frother Dimensions and weight model Citiz & milk Dimensions and weight model Citiz & Co General information Opera TionStatus indication Status indication of coffee machine Button Status indication of milk frother AERO3 Machine status etc Operating button Light signal Machine modes of Citiz coffee machines Enter mode Actions Exit modeMachine modes Machine modes of milk frother AERO3 Machine modeMachine mode Enter mode Actions Exit mode Programming the fill up level Program/reset fill up levelResetting the fill up level Empty water system Before first coffee or at the start of day Daily maintenance and cleaningMA Intena NCE After last coffee or at the end of day Milk frother of model Citiz & milk Descaling Descaling procedure for models Citiz and Citiz & milk Observe the safety instructions on the descaler package I N T E N a N C E Rinse thoroughly to remove any residue Descaling procedure for model Citiz & Co Do not open handles dur ing descaling process I N T E N a N C E I N T E N a N C E Check list for coffee machine all models Check Error symptomsTroub L Eshooting Work Check Error symptoms Measure Check list for milk frother Error symptoms Measure Repair workCheck Further measures / repair Work Repair and mounting tips Safety instructionsRepa IRS Bottom of platform Designation of spare parts Wiring arrangementElectrostatic discharge protection Residual water Tools and accessories General disassembly Platform disassembly model Citiz Bottom cover Assembly checkpoints Replacing water tank connector Replacing mains switch Assembly checkpoints Replacing power cord Wiring with twocore power cord Wiring with threecore power cord Removing core unit Use apair of flat pliers Assembly checkpoints Platform disassembly model Citiz & milk P a I R S P a I R S Assembly checkpoints Replacing water tank connector Assembly checkpoints Replacing milk frother connector Receptacles Replacing power cord Assembly checkpoints Removing core unit Tacle Assembly checkpoints Platform disassembly model Citiz & Co Core units are If necessary use a screwdriver to remove protective cover Assembly checkpoints Replacing water tank connector Replacing mains switch Assembly checkpoints Replacing power cord Assembly checkpoints Removing core units Assembly checkpoints Remove left side panel Disassembly of core unit, Crange P a I R S Remove blind Remove right side panel Remove front cover with outlet Remove cover Assembly checkpoints Replacing compact brewing unit Assembly checkpoints General Replacing pump Replacing pump assembly Seat for the fork wrench 101 Assembly checkpointReplacing flow meter Replacing automatic priming device APD 103 Replacing thermoblock with NTC sensor and fine wire fuses Assembly checkpoint NTC temperature sensor Replacing NTC temperature sensorReplacing fine wire fuses 105 Assembly checkpoints thermoblock Assembly checkpoints fine wire fuses 107 Replacing electronic control board with button prints P a I R S 109 Disassembly of core unit, DrangeRemove outlet Remove right side panel 111 Swing up and remove right side panel 113 Closing handle should be opened 115 Refer to page 114 for removing cover 117 Wiring diagram 220 V 240 V IEC model Citiz, EF 483/484 Wiring diagramsWiring diagrams model Citiz 119 Wiring diagram 120 V UL USA/Canada model Citiz, EF 483/484 P a I R S 121 Wiring diagram 110 V IEC Taiwan model Citiz, EF 483/484 123 Wiring diagram 100 V IEC Japan model Citiz, EF 483/484 Wiring diagrams model Citiz & milk, EF 485/486 125 P a I R S 127 Wiring diagrams model Citiz & Co, EF 487/488 129 Overview Function TestsRequired equipment 131 Citiz pressure gauge adapter Measure flow rate 133 Pressure and leakage checks Preparations 135 Test run Measure coffee temperature 137 Coffee temperature should be 86 C ± 3 C 187 F ± 5.4 F Milk frother tests Measure hot milk temperatureMeasure milk froth ratio Prerequisite 139 NTC temperature sensor functionality Measurement table NTC DiagramNTC temperature NTC min. resistance NTC max. resistance What coffee machine has to be tested and when? Protective earth PE continuity testGeneral 141 Resistance must be lower than Ohm Test sequence Additional test for coffee machine Citiz & milk What to do if the protective earth continuity test fails143 What coffee machines have to be tested and when? Protective insulation test 145 Additional tests for coffee machine Citiz & milk 147 What to do if the insulation test fails 10.1Model Citiz, core unit Drange EF Expl Osion DRA Wings 149 Model Citiz, core unit Crange EF Model Citiz & milk, core unit Drange EF 151 Model Citiz & milk, core unit Crange EF Model Citiz & Co, core unit Drange EF 153 Model Citiz & Co, core unit Crange EF Remark PA RTS L ISTPos.Component Pos Component 155 Connection cable UL 157 T E S