Nespresso Maestria EF 285 Service Manual page 3

5.3.5 Status indication of milk frother.............................................................. 33
6 Troubleshooting
6.1 Check list for Maestria coffee machine ............................................................ 34
6.2 Check list for Gran Maestria coffee machine ................................................... 37
7 Repairs
................................................................................................................ 40
7.1 Safety instructions ........................................................................................... 40
7.2 Repair and mounting tips ................................................................................. 40
7.3 Tools and accessories ..................................................................................... 42
7.4 Repair instructions - Maestria .......................................................................... 42
7.4.1 General disassembly - Maestria ............................................................ 42
7.4.2 Replacing water tank connector ............................................................ 47
7.4.3 Replacing power cord ............................................................................ 48
7.4.4 Replacing electronic mainboard (Maestria) ........................................... 49
7.4.5 Replacing changeover (outlet) valve ..................................................... 51
7.4.6 Replacing steam valve .......................................................................... 53
7.4.7 Replacing thermoblocks and NTC temperature sensors ....................... 54
7.4.8 Replacing coffee pump and flow meter ................................................. 55
7.4.9 Replacing steam pump .......................................................................... 59
7.4.10 Replacing Espresso / Lungo push/turn controls .................................... 60
7.4.11 Replacing On/Off button assembly ........................................................ 62
7.4.12 Replacing brewing unit .......................................................................... 63
7.4.13 Replacing steam pipe ............................................................................ 64
7.4.14 Replacing support for cup holder........................................................... 66
7.4.15 Reassembly and wiring instructions - Maestria ..................................... 66
7.5 Repair instructions - Gran Maestria ................................................................. 73
7.5.1 General disassembly - Gran Maestria ................................................... 73
7.5.2 Replacing milk frother connector ........................................................... 80
7.5.3 Replacing cup heater............................................................................. 81
7.5.4 Replacing electronic mainboard (Gran Maestria) .................................. 82
7.5.5 Replacing milk regulator assembly ........................................................ 83
7.5.6 Reassembly and wiring instructions - Gran Maestria ............................ 83
8 Wiring diagrams
8.1 Wiring diagram versions .................................................................................. 91
8.2 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) ................................... 96
8.2.4 Wiring diagram Maestria 120 V, 50 - 60 Hz (UL) ULKA......................... 98
8.2.5 Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) ...................... 100
8.2.6 Wiring diagram Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA ............ 102
8.3 Wiring diagrams - Gran Maestria EF 287 ...................................................... 104
8.3.1 Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) ............ 104
8.3.2 Wiring diagram Gran Maestria 220 - 240 V / 50 - 60 Hz (IEC) ULKA.. 106
8.3.3 Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL)....................... 108
8.3.4 Wiring diagram Gran Maestria 120 V / 50 - 60 Hz (UL) ULKA ............ 110
8.3.5 Wiring diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) ............. 112
8.3.6 Wiring diagram Gran Maestria 100 - 127 V, 50 - 60 Hz (IEC) ULKA ... 114
............................................................................................... 34
............................................................................................... 91
Maestria / Gran Maestria service manual
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