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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...
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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...
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.
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.
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)
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).
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)
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...
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...
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)
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)
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...
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...
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...
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...
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...
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...
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.
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.
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 ...
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 ..............
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) ..............
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.
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”...
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...
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 •...
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).
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...
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...
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.
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...
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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...
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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...
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...
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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...
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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...
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.
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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)
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 •...
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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...
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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.
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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. •...
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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.
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). •...
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.
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)
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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 •...
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...
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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).
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 •...
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).
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.
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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).
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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) •...
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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.
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). •...
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...
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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).
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).
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).
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). •...
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R E P A I R S Assembly checkpoint • Replace the black seal (92) in housing (1) correctly. Maestria / Gran Maestria service manual...
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).
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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...
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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.
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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...
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R E P A I R S Wiring on right side of Maestria Maestria / Gran Maestria service manual...
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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.
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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...
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.
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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...
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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...
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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.
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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. •...
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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...
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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.
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.
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). •...
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)
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.
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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.
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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...
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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...
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R E P A I R S Wiring on right side of Gran Maestria Maestria / Gran Maestria service manual...
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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.
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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.
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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...
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"...
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...
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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...
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...
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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...
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...
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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...
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...
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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...
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.
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: •...
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.
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.
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.
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.
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.
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.
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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.
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.
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.
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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.
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.
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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...
(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.
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:...
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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. •...
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.
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.
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.
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. •...
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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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...
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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...
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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...
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...
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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°...
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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...