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Nespresso Maestria EF 285 Service Manual

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Table of Contents
S E R V I C E M A N U A L
M A E S T R I A / G R A N M A E S T R I A
C O F F E E M A C H I N E S
Maestria
Gran Maestria
EF 285
EF 287
Version 0.1 en

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Summary of Contents for Nespresso Maestria EF 285

  • Page 1 S E R V I C E M A N U A L M A E S T R I A / G R A N M A E S T R I A C O F F E E M A C H I N E S Maestria EF 285 Gran Maestria...
  • Page 2: Table Of Contents

    3.3.2 Water circuit diagram - Gran Maestria ...........20 4 Technical Data ....................21 Rating plates ....................21 4.1.1 Nespresso specific rating plates ............21 4.1.2 Rating plate details ................21 4.1.3 Rating plate of milk frother ..............22 Summary of technical data................23 4.2.1 Technical data of coffee machines ............23 4.2.2 Technical data of milk frother ..............24...
  • Page 3 ....................91 Wiring diagram versions .................. 91 Wiring diagrams - Maestria EF 285 ..............92 8.2.1 Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) ......92 8.2.2 Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) ULKA ....94 8.2.3 Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) ........
  • Page 4 10.2 Exploded drawings for Gran Maestria EF 287 ..........147 11 Spare parts Lists .....................155 11.1 Spare part selection criteria................155 11.2 Spare parts list - Maestria EF 285 ..............155 11.3 Spare parts list - Gran Maestria EF 287 ............158 12 Notes .........................161...
  • Page 5 Spare parts lists and exploded drawings are subject to change. To obtain the last version, please contact your official spare parts supplier. Access is restricted Visit the Nespresso technical website periodically to check for upgrades, technical and can be obtained modifications, counter measures etc. for these coffee machines: by asking your https://business.nespresso.com...
  • Page 6: General Safety Notes

    G E N E R A L S A F E T Y N O T E S G E N E R A L S A F E T Y N O T E S Risk of fatal electrical shock and fire! Mains voltage inside the coffee machine.
  • Page 7: Model Range

    M O D E L R A N G E M O D E L R A N G E Maestria Front view, right and left side. Simultaneous heat-up of both thermoblocks is only possible with 220 - 240 V versions. This basic model is equipped with a steam pipe.
  • Page 8: Main Components

    M A I N C O M P O N E N T S M A I N C O M P O N E N T S Main components - Maestria 3.1.1 Overview - Maestria 1) Water tank 7) Tray cover 2) Steam pipe (pivotable, with steam 8) Capsule container (for used capsules, nozzle and frothing sleeve)
  • Page 9: Operating Elements - Maestria

    M A I N C O M P O N E N T S 3.1.2 Operating elements - Maestria 1) On/Off button 4) Push/turn control (Lungo) 2) Lever 5) Push/turn control (Espresso) 3) Indication lights (3x) 6) Steam handle The On/Off button (1) automatically switches off the coffee machine after a preset time of non-use (factory setting 9 min).
  • Page 10: Interior View 1 - Maestria

    M A I N C O M P O N E N T S 3.1.3 Interior view 1 - Maestria Left side view, front side. Top cover, side pan- els and bottom part removed. 1) Micro switches (2x) 5) Thermoblock types 2010 (coffee) and 2) Steam valve 2011 (steam) arranged behind one 3) Brewing unit (TCBU)
  • Page 11: Interior View 2 - Maestria

    M A I N C O M P O N E N T S 3.1.4 Interior view 2 - Maestria Right side view, rear side. Top cover, side pan- els and bottom part removed. 1) Pump for coffee preparation 3) Flow meter 2) Pump for steam preparation ON/OFF switch assembly Maestria / Gran Maestria service manual...
  • Page 12: Interior View 3 - Maestria

    M A I N C O M P O N E N T S 3.1.5 Interior view 3 Maestria View from below. Bot- tom cover removed. 1) Terminal block 3) Electronic main board assembly (power cord connection) 2) Water tank connector Maestria / Gran Maestria service manual...
  • Page 13: Main Components - Gran Maestria

    M A I N C O M P O N E N T S Main components - Gran Maestria 3.2.1 Overview - Gran Maestria 1) Drip grid 8) Power cord 2) Cup support (pivotable) 9) Maintenance unit cpl. 3) Cup heater 10) Capsule container (for used capsules, 4) Metal plate for magnetic contact backlighted)
  • Page 14: Overview - Milk Frother

    M A I N C O M P O N E N T S 3.2.2 Overview - milk frother The milk frother is part of the Gran Maestria coffee machine. 1) Lid 5) Spout 2) Seal 6) Power socket 3) Indication of max. milk and foam level 7) Whisk 4) Jug The inside of the jug (4)
  • Page 15: Operating Elements - Gran Maestria

    For possible settings of the push/turn controls (4, 5, 6) see “Machine settings” on page 27. The cup heater is designed for the size The cup heater is activated by pressing down its three rips (4) with the rim of a cup. of Nespresso’s espresso cups. Maestria / Gran Maestria service manual...
  • Page 16: Interior View 1 - Gran Maestria

    M A I N C O M P O N E N T S 3.2.4 Interior view 1 - Gran Maestria Left side view. Side panels removed. 1) Thermoblock types 2010 (coffee) and 3) Pivoting mechanism for cup support 2011 (cup heating) arranged behind 4) Snap lock for capsule container one another 2) NTC temperature sensor...
  • Page 17: Interior View 2 - Gran Maestria

    M A I N C O M P O N E N T S 3.2.5 Interior view 2 - Gran Maestria Right side view. Side panels removed. 1) Pump for coffee preparation 3) Milk regulator 2) Pump for cup heating and flow meter (not visible) Maestria / Gran Maestria service manual...
  • Page 18: Interior View 3 - Gran Maestria

    M A I N C O M P O N E N T S 3.2.6 Interior view 3 Gran Maestria View from below. Bot- tom cover removed. 1) Terminal block (power cord 3) Electronic main board assembly connection) 4) Micro switches (3x) of cup heater 2) Water tank connector 5) Milk frother connector Maestria / Gran Maestria service manual...
  • Page 19: Fluid System

    M A I N C O M P O N E N T S Fluid System 3.3.1 Water circuit diagram - Maestria TB 2010 TB 2011 TCBU 1) Flow meter 9) Thermoblock (2011) 2) Pump 10) Vent valve (optional) 3) Thermoblock (2010) 11) Drip tray 4) Water tank 12) Vent valve...
  • Page 20: Water Circuit Diagram - Gran Maestria

    M A I N C O M P O N E N T S 3.3.2 Water circuit diagram - Gran Maestria TB 2010 TB 2011 TCBU 1) Flow meter 8) Pump 2) Pump 9) Thermoblock (2011) 3) Thermoblock (2010) 10) Outlet valve (optional) 4) Water tank 11) Cup warmer 5) Water tank valve...
  • Page 21: Technical Data

    T E C H N I C A L D A T A T E C H N I C A L D A T A Rating plates The rating plate can 4.1.1 Nespresso specific rating plates be found at the bot- tom of each coffee Maestria, EU-version Gran Maestria, EU-version machine.
  • Page 22: Rating Plate Of Milk Frother

    T E C H N I C A L D A T A Decoding the alphanumeric serial number By decoding the date Example: of production and machine type, the 120 19 2 871 0007 782 1JG coffee machine can be Checksum (if available) identified exactly.
  • Page 23: Summary Of Technical Data

    T E C H N I C A L D A T A Summary of technical data 4.2.1 Technical data of coffee machines Technical data are Mains voltage ranges valid for both models, Mains voltage Maestria and Gran Maestria, unless explicitly - Europe, RU, AU, CN, KR, SG, HK, ME, ZA, IL, BR, AR ...
  • Page 24: Technical Data Of Milk Frother

    T E C H N I C A L D A T A 4.2.2 Technical data of milk frother Mains voltage Version 92948: Europe, RU, AU, CN, KR, SG, HK, ME, ZA, IL, BR, AR....220-240 V / 50-60 Hz Version 92947: USA, Canada, BR, MX ..............
  • Page 25: Dimensions And Weight - Maestria

    T E C H N I C A L D A T A 4.2.3 Dimensions and weight - Maestria Dimensions (A x B x C) ..............385 x 302 x 170 mm Power cord length ..................approx. 1 m Weight (without water) ................approx. 5.3 kg 4.2.4 Dimensions and weight - Gran Maestria Dimensions (A x B x C) ..............
  • Page 26: Dimensions And Weight - Milk Frother

    T E C H N I C A L D A T A 4.2.5 Dimensions and weight - milk frother Jug diameter (D)..................max. 95 mm Jug height (H)..........approx. 170 mm (jug without lid 165 mm) Dimensions of whisk (diameter x height).............33 x 32 mm Weight (with spring whisk)..............approx.
  • Page 27: Machine Settings And Modes

    M A C H I N E S E T T I N G S A N D M O D E S M A C H I N E S E T T I N G S A N D M O D E S General information For an overview of operational controls see “Main Components”...
  • Page 28: Milk Frother Setting (Gran Maestria)

    M A C H I N E S E T T I N G S A N D M O D E S 5.2.3 Milk frother setting (Gran Maestria) The push/turn control at the right side of the Gran Maestria coffee machine determines the operation mode of the milk frother according to the following table: Dial setting Operating mode...
  • Page 29: Status Indication

    M A C H I N E S E T T I N G S A N D M O D E S Espresso push/turn control Lungo push/turn control Dial setting Menu / Function Dial setting Setting / Value Press Lungo button: Reset to factory setting 1 / 2 / 3 / 4 •...
  • Page 30: General Status Indication

    M A C H I N E S E T T I N G S A N D M O D E S 5.3.2 General status indication The middle LED is The left and right LEDs on the front side show the status of the coffee machine while the bicoloured (white / middle LED shows the status of the steam pipe (Maestria) or cup heater (Gran Maestria).
  • Page 31: Descaling Status Indication - Maestria

    M A C H I N E S E T T I N G S A N D M O D E S Left Middle Right Machine status etc. LED signal Middle LED Emptying (evaporating) blinking with 2 Hz steam circuit / cup heater (0.25 s on, 0.25 s off) Left / right LEDs on Steam circuit / cup heater...
  • Page 32: Descaling Status Indication - Gran Maestria

    M A C H I N E S E T T I N G S A N D M O D E S 5.3.4 Descaling status indication - Gran Maestria Special light signals show the progress during descaling. Left Middle Right Descaling status LED signal...
  • Page 33: Maestria / Gran Maestria Service Manual

    M A C H I N E S E T T I N G S A N D M O D E S 5.3.5 Status indication of milk frother The LED next to the push/turn control at the right side of the coffee machine is bicoloured (red / blue) shows the status of the milk frother according to the following table: Milk frother status etc.
  • Page 34: Troubleshooting

    T R O U B L E S H O O T I N G T R O U B L E S H O O T I N G Check list for Maestria coffee machine After an initial inspec- Measure / Further measures / Check...
  • Page 35 T R O U B L E S H O O T I N G Measure / Further measures / Check Error symptoms repair work repair work One or both LEDs above 4 Switch on coffee 4.3 Coffee machine Espresso and Lungo push/turn - check Espresso / Lungo machine with ON/ does not get ready...
  • Page 36 NO - continue inspection (see “Function tests” 12.2 No errors found YES - For further investigation on page 116 according to check please contact the Nespresso list? Service Division End of check list Maestria / Gran Maestria service manual...
  • Page 37: Check List For Gran Maestria Coffee Machine

    T R O U B L E S H O O T I N G Check list for Gran Maestria coffee machine After an initial inspec- Measure / Further measures / Check Error symptoms tion in accordance repair work repair work with this check list, 1.1 Housing parts YES - replace housing parts...
  • Page 38 T R O U B L E S H O O T I N G Measure / Further measures / Check Error symptoms repair work repair work 5.1.1 Cup heater (pump) starts YES - check rips / micro if only one or two rips are switches pressed? NO - continue...
  • Page 39 NO - continue resolving problem(s). inspection (see 12.2 No errors found YES - For further investigation “Function tests” according to check please contact the Nespresso on page 116 list? Service Division End of check list Maestria / Gran Maestria service manual...
  • Page 40: Repairs

    Nespresso coffee machines. As a rule, similar components (e.g. pumps, thermoblocks etc.) of the two coffee machine models are presented in detail only once in the Maestria repair instructions.
  • Page 41 R E P A I R S Observe max. torque for the screw connections according to the following table: Screws Screw connections Torques on new aluminium parts without threads, e.g. 200 (+50/-50) Ncm TX 20, self-tapping upper cover, base 2 (+0.5/-0.5) Nm 60 (+20/-10) Ncm TX 10 (4 x) on lever of brewing unit (TCBU)
  • Page 42: Tools And Accessories

    R E P A I R S Tools and accessories With the following assortment of tools, all repairs described can be made: • TORX screwdrivers • Small permanent magnet (mounting A bit holder with appropriate bits can (TX 8, TX 10, TX 20) aid) also be used as •...
  • Page 43 R E P A I R S Only if necessary: • Turn cable holder (168) to the side. • Remove power cord from strain relief and cable-storage fixation. • Loosen 6 screws (TX 20) and remove base cover (167) from base (160). Maestria / Gran Maestria service manual...
  • Page 44 R E P A I R S • Loosen fixing screw and remove steam handle (824). • Position a small permanent magnet as mounting aid at the base (160) to fix its coun- A small permanent terpart (161). magnet (161), loosely inserted in the base acts as magnetic mounting for the drip tray.
  • Page 45 R E P A I R S Coffee machine is shown upside down for better visibility of fixing screws. • Loosen 4 fixing screws (TX 20) of side panels (169, 170) at base (160). • Loosen 4 upper fixing screws (TX 20) of side panels. •...
  • Page 46 R E P A I R S • Loosen 4 fixing screws (TX 20) of upper part of housing (132). • Open lever (130) vertically. • Lift upper part of housing (132) a little bit at the front side and pivote the housing from the back to the front following the lever.
  • Page 47: Replacing Water Tank Connector

    R E P A I R S 7.4.2 Replacing water tank connector The water tank con- nector (808) is replaced together with gasket and sieve insert. Hose to flow meter Hose to steam pump • Pull off both hoses from water tank connector (808). •...
  • Page 48: Replacing Power Cord

    R E P A I R S 7.4.3 Replacing power cord • Loosen 2 screws (TX 10) and remove strain relief clamp (165). • Unscrew power cord connections (166) from terminal block (164). Assembly checkpoints • The strain relief clamp (165) is designed for different cable diameters. Check that the strain relief clamp is correctly mounted (correct side up or down, see detail in illustration and following table) by pulling on the cable.
  • Page 49: Replacing Electronic Mainboard (Maestria)

    R E P A I R S 7.4.4 Replacing electronic mainboard (Maestria) Top covers removed. The bottom cover has 2 cable guides (8). Other guides are present on the print cover. Cables must be correctly guided to avoid squeezing. Connectors The connectors are 1) no wiring 4) Flow meter connector (white)
  • Page 50 R E P A I R S • Unclip and remove electronic cover (125). • Unplug all connectors and flat receptacles from electronic main board. • Remove all wires from cable guides on electronic main board assembly (806). • Loosen 4 fixing screws (TX 10) and remove electronic main board assembly. Assembly checkpoints •...
  • Page 51: Replacing Changeover (Outlet) Valve

    R E P A I R S 7.4.5 Replacing changeover (outlet) valve • Pull both clips (58) from fluid connections and remove outlet valve (61). Maestria / Gran Maestria service manual...
  • Page 52 R E P A I R S Assembly checkpoint Also note the arrows • Observe correct mounting position of outlet valve (61) according to illustration. on top of the outlet valve case (61): arrow in - from thermoblock arrow out - towards relieve tank (820).
  • Page 53: Replacing Steam Valve

    R E P A I R S 7.4.6 Replacing steam valve • Pull clips from fluid connections and remove both pressure hoses. • Loosen screw (TX 10) and remove steam valve clip (82). • Loosen 2 screws (TX 10) and remove steam valve (821). Assembly tip •...
  • Page 54: Replacing Thermoblocks And Ntc Temperature Sensors

    R E P A I R S 7.4.7 Replacing thermoblocks and NTC temperature sen- sors A defect thermoblock can only be replaced with an assembly consisting of: Depending on national regulations, thermoblock cover (upper or lower part of encapsulation), one or two thermo thermoblock, fuses are mounted on each pre-wiring with NTC temperature sensor and thermo fuse(s).
  • Page 55: Replacing Coffee Pump And Flow Meter

    R E P A I R S 7.4.8 Replacing coffee pump and flow meter Coffee pump and thermal protection variants The coffee machine is equipped either with a Ulka/Ceme pump with thermo fuse or a Sysko pump with a thermostat depending on the voltage range. It is important to know the main features of the different thermal protection devices.
  • Page 56 R E P A I R S Remove coffee pump assembly with flow meter The Sysko pump is shown as example. Position numbers of the Ulka / Ceme pump and its accessory are indicated in brackets. (811) • Pull fluid connection clip (58) and remove pressure hose from outlet of pump (805 / 811).
  • Page 57 R E P A I R S • Remove flow meter hose from water tank connector (see “Replacing water tank connector” on page 47). Upper (15 / 197) and lower (14 / 196) pump holders have stop- pers and latches. (197) (196) •...
  • Page 58 R E P A I R S (811) (201) (197) (196) • Pull pump inlet out of molded tube (21 / 201) • Remove upper pump holder (15 / 197) from pump (805 / 811). To replace flow meter: • Remove cable connector from flow meter (22) if not already done.
  • Page 59: Replacing Steam Pump

    R E P A I R S 7.4.9 Replacing steam pump • For better access remove lower pump holder (14) with coffee pump and flow meter first (see “Replacing coffee pump and flow meter” on page 55). • Remove hose (10) from pump inlet (6). •...
  • Page 60: Replacing Espresso / Lungo Push/Turn Controls

    R E P A I R S 7.4.10 Replacing Espresso / Lungo push/turn controls • Set defect push/turn button (802 / Espresso or Lungo / 803) to position 1. Don't remove com- • To release button, lift clip (139) slightly with pletely the clip (139) a small hook (preferred) as it is not easy to put...
  • Page 61 R E P A I R S • To remove the push/turn control module (Espresso 802, Lungo 803), press down latch (A) of holder (152) with a screwdriver. • Then insert thumb or finger tip in front opening and press push/turn control module backwards with caution until it is released from latch (A).
  • Page 62: Replacing On/Off Button Assembly

    R E P A I R S 7.4.11 Replacing On/Off button assembly • Remove all wires of On/Off button (804) from electronic mainboard (see “Replacing electronic mainboard (Maestria)” on page 49). • Loosen 2 screws (TX 10) with screwdriver and remove On/Off button assembly (804).
  • Page 63: Replacing Brewing Unit

    Loosen 2 screws (TX 20 (axle bolt) and TX 10) and remove lever brake assembly has no lever brake. (823 with other parts, for Maestria EF 285 only). • Loosen 4 screws (TX 10) and remove brewing unit (96) from holder (95).
  • Page 64: Replacing Steam Pipe

    R E P A I R S 7.4.13 Replacing steam pipe • Remove On/Off button assembly (see “Replacing On/Off button assembly” on page 62). • Remove clip from brewing unit hose connection at thermoblock (809) or at brewing unit TCBU (96). •...
  • Page 65 R E P A I R S Assembly checkpoint • Replace the black seal (92) in housing (1) correctly. Maestria / Gran Maestria service manual...
  • Page 66: Replacing Support For Cup Holder

    R E P A I R S 7.4.14 Replacing support for cup holder • Loosen screw (TX 10) and remove relieve tank (820, Maestria only). • Loosen 2 screws (TX 10) and remove support (807) for cup holder together with spring (70).
  • Page 67 R E P A I R S Wiring on left side of Maestria Wiring instructions: 1) Insert wires in comb-like cable guide. Maestria / Gran Maestria service manual...
  • Page 68 R E P A I R S 2) Secure ground wires with retaining washer. 3) Insert wires in comb-like cable guide. 4) Connect wires to micro switches cor- rectly (red wire is connected to top micro switch). If in doubt, test steam valve functional- ity.
  • Page 69 R E P A I R S 6) Insert wires to electronic main board in 2 cable guides. 7) Insert wires to electronic main board in cable guide. 8) Insert wires in latch at heat sink. Maestria / Gran Maestria service manual...
  • Page 70 R E P A I R S Wiring on right side of Maestria Maestria / Gran Maestria service manual...
  • Page 71 R E P A I R S Wiring instructions: 1) Pass wires towards Espresso and Lungo push/turn control modules between brewing unit and its metallic holder. Pass wires towards Espresso and Lungo push/turn control modules between brewing unit and its metallic holder.
  • Page 72 R E P A I R S 3) Insert wires in cable guide. 4) Insert wires in comb-like cable guide. 5) Insert wires in comb-like cable guide. Lay wire from pump behind pressure hose. 6) Insert wires in latch at heat sink. Maestria / Gran Maestria service manual...
  • Page 73: Repair Instructions - Gran Maestria

    R E P A I R S Repair instructions - Gran Maestria For similar components (e.g. pumps, thermoblocks etc.) of the two coffee machine models, refer to the Maestria repair instructions. 7.5.1 General disassembly - Gran Maestria This general disassembly gives access to the components and wiring of the coffee machine.
  • Page 74 R E P A I R S • Place the coffee machine on a dismantling surface that will not damage or scratch the metallic housing of the machine. • Loosen 6 screws (TX 20) and remove aluminium base (173). Maestria / Gran Maestria service manual...
  • Page 75 R E P A I R S Only if necessary: • Turn cable holder (175) to the side. • Remove power cord from strain relief and cable-storage fixation. • Loosen 10 screws (TX 20) and remove plastic base (174). Maestria / Gran Maestria service manual...
  • Page 76 R E P A I R S • Position a small permanent magnet as mounting aid at the base (141) to fix its coun- A small permanent terpart (142). magnet (142), loosely inserted in the base acts as magnetic mounting for the drip tray.
  • Page 77 R E P A I R S Coffee machine is shown upside down for better visibility of fixing screws. • Loosen 4 fixing screws (TX 20) of side panels (148, 149) at base (141). • Loosen 4 upper fixing screws (TX 20) of side panels. •...
  • Page 78 R E P A I R S For easy removal lift • Pull off spring clip (64) and remove the turning knob (117) from milk regulator (821). spring clip with pliers away from housing. Maestria / Gran Maestria service manual...
  • Page 79 R E P A I R S • Loosen 4 fixing screws (TX 20) of upper part of housing (114). • Open lever (112) vertically. • Lift upper part of housing (114) a little bit at the front side and pivote the housing from the back to the front following the lever.
  • Page 80: Replacing Milk Frother Connector

    R E P A I R S 7.5.2 Replacing milk frother connector Simplified base illus- tration. 167 + 168 + 172 • Unclip and remove electronic cover (108) from electronic mainboard (806). • Unplug from electronic mainboard milk frother connector all milk frother wires with flat receptacles.
  • Page 81: Replacing Cup Heater

    R E P A I R S 7.5.3 Replacing cup heater Simplified base illus- tration. • Remove plastic grid (164) from cup heater (820). • Unplug all flat receptacles from micro switches on cup heater. • Pull clip from fluid connection and remove steam hose from thermoblock (810). •...
  • Page 82: Replacing Electronic Mainboard (Gran Maestria)

    R E P A I R S 7.5.4 Replacing electronic mainboard (Gran Maestria) Top covers removed. The bottom cover has 2 cable guides (8). Other guides are present on the print cover. Cables must be correctly guided to avoid squeezing. Connectors 1) Milk frother connector (4 colours) 4) Flow meter connector (white)
  • Page 83: Replacing Milk Regulator Assembly

    R E P A I R S 7.5.5 Replacing milk regulator assembly • Unplug connector for milk regulator (821) from electronic mainboard (806). Do not lose cable • Remove 3 cable clips (111) from holder (1) by pressing the retention latches clips! inwards.
  • Page 84 R E P A I R S Wiring instructions and checks A final wiring check must be conducted before mounting the side panels and the bottom cover. Refer to the following left and right side views for critical places and spots where wiring For wiring of elec- problems can appear.
  • Page 85 R E P A I R S Wiring instructions: 1) Insert wires in comb-like cable guide. 2) Secure ground wires with retaining washer. 3) Insert wires in comb-like cable guide. Maestria / Gran Maestria service manual...
  • Page 86 R E P A I R S 4) Insert wires in cable clamp. 5) Insert wires to electronic main board in 2 cable guides. 6) Insert wires to electronic main board in cable guide. 7) Insert wires in latch at heat sink. Maestria / Gran Maestria service manual...
  • Page 87 R E P A I R S Wiring on right side of Gran Maestria Maestria / Gran Maestria service manual...
  • Page 88 R E P A I R S Wiring instructions: 1) Pass wires towards Espresso and Lungo push/turn control modules between brewing unit and its metallic holder. Pass wires towards Espresso and Lungo push/turn control modules between brewing unit and its metallic holder.
  • Page 89 R E P A I R S 3) Insert wires in cable guide. 4) Insert wires in 2 cable guides. 5) Insert wires in comb-like cable guide. 6) Insert wires in comb-like cable guide. Lay wire from pump behind pressure hose.
  • Page 90 R E P A I R S 7) Insert wires in latch at heat sink. 8) Wire micro switches of cup heater in series. Maestria / Gran Maestria service manual...
  • Page 91: Wiring Diagrams

    W I R I N G D I A G R A M S W I R I N G D I A G R A M S Wiring diagram versions Each coffee machine has its own set of wiring diagrams. Wiring diagrams which contain "ULKA"...
  • Page 92: Wiring Diagrams - Maestria Ef 285

    W I R I N G D I A G R A M S Wiring diagrams - Maestria EF 285 8.2.1 Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) Maestria / Gran Maestria service manual...
  • Page 93 W I R I N G D I A G R A M S Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) - part 2 Maestria / Gran Maestria service manual...
  • Page 94: Wiring Diagram Maestria 220 - 240 V, 50 - 60 Hz (Iec) Ulka

    W I R I N G D I A G R A M S 8.2.2 Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) ULKA Maestria / Gran Maestria service manual...
  • Page 95 W I R I N G D I A G R A M S Wiring diagram Maestria 220 - 240 V, 50 - 60 Hz (IEC) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 96: Wiring Diagram Maestria 120 V, 50 - 60 Hz (Ul)

    W I R I N G D I A G R A M S 8.2.3 Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) Maestria / Gran Maestria service manual...
  • Page 97 W I R I N G D I A G R A M S Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) - part 2 Maestria / Gran Maestria service manual...
  • Page 98: Wiring Diagram Maestria 120 V, 50 - 60 Hz (Ul) Ulka

    W I R I N G D I A G R A M S 8.2.4 Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) ULKA Maestria / Gran Maestria service manual...
  • Page 99 W I R I N G D I A G R A M S Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 100: Wiring Diagram Maestria 100 - 127 V, 50 - 60 Hz (Iec)

    W I R I N G D I A G R A M S 8.2.5 Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) Maestria / Gran Maestria service manual...
  • Page 101 W I R I N G D I A G R A M S Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) - part 2 Maestria / Gran Maestria service manual...
  • Page 102: Wiring Diagram Maestria 100 - 127 V, 50 - 60 Hz (Iec) Ulka

    W I R I N G D I A G R A M S 8.2.6 Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA Maestria / Gran Maestria service manual...
  • Page 103 W I R I N G D I A G R A M S Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 104: Wiring Diagrams - Gran Maestria Ef 287

    W I R I N G D I A G R A M S Wiring diagrams - Gran Maestria EF 287 8.3.1 Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) Maestria / Gran Maestria service manual...
  • Page 105 W I R I N G D I A G R A M S Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) - part 2 Maestria / Gran Maestria service manual...
  • Page 106: Wiring Diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (Iec) Ulka

    W I R I N G D I A G R A M S 8.3.2 Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) ULKA Maestria / Gran Maestria service manual...
  • Page 107 W I R I N G D I A G R A M S Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 108: Wiring Diagram Gran Maestria 120 V / 50 - 60 Hz (Ul)

    W I R I N G D I A G R A M S 8.3.3 Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL) Maestria / Gran Maestria service manual...
  • Page 109 W I R I N G D I A G R A M S Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL) - part 2 Maestria / Gran Maestria service manual...
  • Page 110: Wiring Diagram Gran Maestria 120 V / 50 - 60 Hz (Ul) Ulka

    W I R I N G D I A G R A M S 8.3.4 Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL) ULKA Maestria / Gran Maestria service manual...
  • Page 111 W I R I N G D I A G R A M S Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 112: Wiring Diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (Iec)

    W I R I N G D I A G R A M S 8.3.5 Wiring diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) Maestria / Gran Maestria service manual...
  • Page 113 W I R I N G D I A G R A M S Wiring Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) - part 2 Maestria / Gran Maestria service manual...
  • Page 114: Wiring Diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (Iec) Ulka

    W I R I N G D I A G R A M S 8.3.6 Wiring diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA Maestria / Gran Maestria service manual...
  • Page 115 W I R I N G D I A G R A M S Wiring diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA - part 2 Maestria / Gran Maestria service manual...
  • Page 116: Function Tests

    F U N C T I O N T E S T S F U N C T I O N T E S T S All basic function Safety instructions tests are shown with the Gran Maestria EF 287 coffee machine only. Some function tests are performed with an energized, partly opened coffee machine.
  • Page 117: Pressure Gauge Adaptor

    F U N C T I O N T E S T S 9.2.2 Pressure gauge adaptor 1) Quick action coupling for pressure 3) Connecting unit hose 4) Fixation unit 2) Operating lever This pressure gauge adaptor is designed for the coffee machines EF 285 and EF 287. The pressure gauge adaptor has 2 parts: •...
  • Page 118: Mounting Pressure Gauge Adapter

    F U N C T I O N T E S T S 9.2.3 Mounting pressure gauge adapter Insert the pressure gauge cautiously to avoid scratches on the metal housing. 1) Open closing handle. 3) Turn connecting unit and insert seal- 2) Insert connecting unit in brewing unit.
  • Page 119: Measure Flow Rate

    F U N C T I O N T E S T S Measure flow rate 1) Fill and insert water tank. 2) Insert and lock pressure gauge adap- tor in brewing unit (see “Mounting The pressure adaptor pressure gauge adapter” on must sit firmly in the capsule bay.
  • Page 120: Pressure And Leakage Checks

    F U N C T I O N T E S T S 7) Open the valve until water begins to flow. 7. / 8. / 11. 8) Close the valve until the pressure gauge indicates 12 bar. Constantly monitor the pressure gauge and if required readjust the valve.
  • Page 121: Preparations

    F U N C T I O N T E S T S 9.4.1 Preparations 1) Remove milk frother. 2) Remove cup support and maintenance unit. 3) Remove both side panels (refer to "General disassembly - Gran Maes- tria" on page 73. 4) Fill and insert water tank.
  • Page 122: Test Run

    F U N C T I O N T E S T S 9.4.2 Test run 10 sec 9) After heating up, set Lungo push/turn control to "3" and push button. 10) Open the valve and let the water flow for approximately 10 sec out of the drain hose.
  • Page 123: Measure Coffee Temperature

    F U N C T I O N T E S T S 13) Switch off the coffee machine. 14) Open the valve and let water flow out of the pressure tester. Measure coffee temperature 1) Switch on coffee machine. 2) Place a measuring cup on cup sup- port.
  • Page 124 F U N C T I O N T E S T S 3) After heating up, set push/turn control to "3" and push button to preheat the coffee outlet with hot water. 4) Empty measuring cup and place it back on cup support.
  • Page 125: Milk Frother Tests (Gran Maestria)

    F U N C T I O N T E S T S Milk frother tests (Gran Maestria) Prerequisite Use newly opened UHT, full fat or semi-skimmed milk at fridge temperature The disregard of this (+ 6 °C ± 2 °C (43 °F ± 3° F) for the following tests only. specification can affect the measuring results.
  • Page 126: Function Test For Cup Heater (Gran Maestria)

    F U N C T I O N T E S T S Function test for cup heater (Gran Maestria) The cup heater is equipped with 3 rips resp. push buttons (see detail) to control the correct placement of a cup on the cup heater. Only if all push buttons are activated together the cup heating process starts.
  • Page 127 F U N C T I O N T E S T S 4) Press cup onto the cup heater until system is filled and hot water starts streaming. Then release cup. The cup gets hot 5) Press cup onto the cup heater again during the test.
  • Page 128: Function Test For Steam Pipe (Maestria)

    F U N C T I O N T E S T S Function test for steam pipe (Maestria) 1) Fill 100 ml (100 gr) tap water in a measuring cup. 2) Switch on coffee machine. 3) Turn steam handle to position "ON" to heat up steam circuit.
  • Page 129 F U N C T I O N T E S T S 8) Check measuring cup: The volume should be less than < 120 ml 120ml. 9) Check if the temperature has signifi- cantly increased. Maestria / Gran Maestria service manual...
  • Page 130: Protective Earth (Pe) Continuity Test

    (with a test current of 200 mA DC). Test equipment Special test equipment is needed that complies with the regulations to perform protec- Ask Nespresso for tive earth continuity measurements. Detailed requirements and tolerances must be veri- recommendations about test equipment.
  • Page 131: Test Sequence

    F U N C T I O N T E S T S 9.9.3 Test sequence 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. 1) Connect black measuring cable to ground pin of power plug with an insu- lated alligator clip (example shown:...
  • Page 132 F U N C T I O N T E S T S Test points for Gran Maestria: • Choose one of the marked test points (screw heads): • on plastic base (174) • on aluminium base (173) • under head of coffee machine. •...
  • Page 133: What To Do If The Protective Earth Continuity Test Fails

    F U N C T I O N T E S T S 3) Press tip of red test probe onto selected test point. 4) Press "measure" button and read off displayed resistance. The resistance must be lower than 0.3 Ohm. Fill in measured value(s) in a test report.
  • Page 134: Protective Insulation Test

    Test equipment Special test equipment is needed that complies with the regulations to perform insulation Ask Nespresso for and withstanding voltage tests. Detailed requirements and tolerances must be verified recommendations about test equipment.
  • Page 135: Test Sequence

    F U N C T I O N T E S T S 9.10.3 Test sequence Danger of electrical shock/short circuit! Do not plug in the coffee machine during insulation test. Danger of electrical shock! Do not touch tip of test probes. Do not touch metallic parts of coffee machine during test.
  • Page 136: What To Do If The Insulation Test Fails

    F U N C T I O N T E S T S 9.10.4 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. •...
  • Page 137: Exploded Drawings

    E X P L O D E D D R A W I N G S 1 0 E X P L O D E D D R A W I N G S 10.1 Exploded drawings for Maestria EF 285 Maestria / Gran Maestria service manual...
  • Page 138 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 139 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 140 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 141 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 142 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 143 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 144 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 145 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 146 E X P L O D E D D R A W I N G S Exploded drawings for Maestria EF 285 (continued) Maestria / Gran Maestria service manual...
  • Page 147: Exploded Drawings For Gran Maestria Ef 287

    E X P L O D E D D R A W I N G S 10.2 Exploded drawings for Gran Maestria EF 287 Maestria / Gran Maestria service manual...
  • Page 148 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 149 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 150 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 151 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 152 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 153 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 154 E X P L O D E D D R A W I N G S Exploded drawings for Gran Maestria EF 287 (continued) Maestria / Gran Maestria service manual...
  • Page 155: Spare Parts Lists

    Pos. 182 = colour and brand-dependent Gran Maestria EF 287 Pos. 112 / 114 / 141 / 148 and 149 = colour-dependent Pos. 184 = color and brand-dependent 11.2 Spare parts list - Maestria EF 285 Spare parts list for Maestria EF 285 Pos. Component...
  • Page 156 S P A R E P A R T S L I S T S Spare parts list for Maestria EF 285 Pos. Component Remark Clip D=5mm browned inox Screw KST/PT 3,0x12 bl galvan rd head Torx-10 CA point Hose FEP D4,0/2,50x200mm 2 clamp ring/2 tubul.rivets...
  • Page 157 S P A R E P A R T S L I S T S Spare parts list for Maestria EF 285 Pos. Component Remark Clip 285 button inox Holder 285 coffee black Light cond. 285 cover print Base 285 alu...
  • Page 158: Spare Parts List - Gran Maestria Ef 287

    S P A R E P A R T S L I S T S Spare parts list for Maestria EF 285 Pos. Component Remark Spare lever brake 285 Spare lever 285 steam valve Polystyr. 285 4-part PE film 600x1100x0,025mm...
  • Page 159 S P A R E P A R T S L I S T S Spare parts list for Gran Maestria EF 287 Pos. Component Remark Hose FEP D4,0/2,50x207mm 2 clamp rings/2 tubul. rivets Hose silic 08,0x1,75x125 60 Shore,white Temperature gauge 285 cpl NTC104M5-S220A2 Fluid connect V shape 125°...
  • Page 160 S P A R E P A R T S L I S T S Spare parts list for Gran Maestria EF 287 Pos. Component Remark Base 287 bottom Cable holder 285 black fixing Shaft 285 cup holder inox, short Sleeve 285 cup holder black Floater 287 drip tray red...
  • Page 161: Notes

    N O T E S 1 2 N O T E S Maestria / Gran Maestria service manual...
  • Page 162 N O T E S Maestria / Gran Maestria service manual...

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