Schaerer Ambiente 2

Table of Contents
SMSO-2-02.00- 15.07.03 3
5.4.7 Brewing unit ..................................................................................................................................................................138
5.4.8 Brewing unit piston motor .............................................................................................................................................141
5.4.9 Rotary-vane type pump.................................................................................................................................................143
5.4.10 Distributor cabinet .........................................................................................................................................................145
5.4.11 Flowmeter .....................................................................................................................................................................147
5.4.12 Instant heater coffee .....................................................................................................................................................148
5.4.13 Instant heater coffee (Booster) .....................................................................................................................................150
5.4.14 Instant heater tea..........................................................................................................................................................152
5.4.15 Instant heater tea (Booster) ..........................................................................................................................................154
5.4.16 Steam generator ...........................................................................................................................................................156
5.4.17 Valve battery.................................................................................................................................................................158
5.4.18 Dispenser carriage........................................................................................................................................................159
5.4.19 Power PCB ...................................................................................................................................................................161
5.4.20 Unit control system .......................................................................................................................................................162
5.5 Service..........................................................................................................................................................................163
5.5.1 Replace heating foil ......................................................................................................................................................163
5.5.2 Grinder..........................................................................................................................................................................164
5.5.3 Brewing unit ..................................................................................................................................................................167
5.5.4 Rotary-vane type pump.................................................................................................................................................171
5.5.5 Clean flowmeter / replace O-ring ..................................................................................................................................174
5.5.6 Replace safety thermostat ............................................................................................................................................175
5.5.7 Repair valve battery......................................................................................................................................................176
5.5.8 Replace Flash-ROM, EEPROM ....................................................................................................................................177
5.5.9 Replace, install microswitch..........................................................................................................................................178
6 Control system diagram............................................................................................. 179
6.1 Safety regulations .........................................................................................................................................................179
6.2 Control system diagram ................................................................................................................................................179
6.3 Technical diagram.........................................................................................................................................................179
6.4 Trouble-shooting electrical circuits................................................................................................................................179
6.4.1 Voltage data..................................................................................................................................................................179
6.4.2 System test / initial test .................................................................................................................................................180
6.4.3 Selecting the test locations ...........................................................................................................................................180
6.4.4 Conventions of presentation .........................................................................................................................................180
6.4.5 Colour coding for cables ...............................................................................................................................................180
6.4.6 Electrical circuits / conductor designations ...................................................................................................................180
6.5 Trouble-shooting electrical circuits................................................................................................................................181
6.5.1 Power supply line..........................................................................................................................................................181
6.5.2 Power PCB, control voltage ..........................................................................................................................................183
6.5.3 Power PCB, stabiliser, control voltage..........................................................................................................................185
6.5.4 Cup plate heating..........................................................................................................................................................186
6.5.5 Ventilators.....................................................................................................................................................................187
6.5.6 Ventilators (from SW NT2v1.07) ...................................................................................................................................188
6.5.7 Panel switch..................................................................................................................................................................189
6.5.8 Drawer for coffee grounds – limit switch .......................................................................................................................190
6.5.9 Grinder motor “left hand side ........................................................................................................................................191
6.5.10 Grinder motor “right hand side”....................................................................................................................................192
6.5.11 Piston motor..................................................................................................................................................................193
6.5.12 Limit switch for brewing unit start position.....................................................................................................................194
6.5.13 Instant heater – “coffee”, 3kW heater............................................................................................................................197
6.5.14 Temperature sensor “coffee” ........................................................................................................................................198
6.5.15 Flow meter ....................................................................................................................................................................199
6.5.16 Brewing valve ...............................................................................................................................................................200
6.5.17 Brewing valve (Booster)................................................................................................................................................201
6.5.18 Flush valve....................................................................................................................................................................202
6.5.19 Valve for additional water (optional features)................................................................................................................203
6.5.20 Booster .........................................................................................................................................................................204
6.5.21 Rotary-vane type pump, motor .....................................................................................................................................207
6.5.22 Instant heater – tea, 3kW heater...................................................................................................................................209
6.5.23 Temperature sensor – “tea” ..........................................................................................................................................210
6.5.24 Discharge valve – “tea” .................................................................................................................................................211
6.5.25 Steam generator heating, 3kW .....................................................................................................................................213
6.5.26 Temperature sensor - “steam” ......................................................................................................................................214
6.5.27 Level probe – “steam” ...................................................................................................................................................215
6.5.28 Feed valve – “steam” ....................................................................................................................................................216
6.5.29 Discharge valve – “steam” ............................................................................................................................................217
6.5.30 Discharge valve – “steam, milk”....................................................................................................................................218
6.5.31 Discharge valve – “steam, milk foam”...........................................................................................................................219
6.5.32 Refrigerator, cover switch .............................................................................................................................................220