Technical Information
2
CM6
Table of Contents
A Warning and Safety Instructions ....................................................................... 6
1 General .................................................................................................................. 6
2 Risk of Burning or Scalding ................................................................................... 6
3 Touch Current Measurement ................................................................................ 6
4 Before the First Use .............................................................................................. 7
B Modification History ............................................................................................ 7
C Technical Data ..................................................................................................... 7
D Layout of Electrical Components .................................................................... 10
1 CM 61x0 .............................................................................................................. 10
2 CM 63x0 .............................................................................................................. 11
001 Overview ............................................................................................................ 12
2 Function ............................................................................................................... 12
2.1 Optical Interface ........................................................................................... 12
2.2 Water Paths .................................................................................................. 12
2.2.1 Overview .................................................................................................. 12
2.2.2 Coffee ...................................................................................................... 13
2.2.3 Hot Water (CM 63x0 Only) ...................................................................... 14
2.2.4 Hot Milk .................................................................................................... 14
2.2.5 Milk Froth ................................................................................................. 15
2.2.6 Rinse........................................................................................................ 15
2.3 Brew Unit Drive ............................................................................................. 16
2.3.1 Microswitch Locations ............................................................................. 16
2.3.2 Brew Unit Presence Monitoring ............................................................... 16
2.3.3 Electronic Grind Amount Compensation ................................................. 16
2.3.4 Brew Unit Drive, Home Position .............................................................. 18
2.3.5 Brew Unit Drive, Compressing Position (Brew Position) ......................... 18
2.3.6 Brew Unit Drive, Drain Position ............................................................... 19
2.4 Machine Response after Power Supply Failure ............................................ 20
2.5 Drip-Tray Sensing ......................................................................................... 20
2.5.1 Fill Level .................................................................................................. 20
2.5.2 Presence ................................................................................................. 20
3 Fault Repair ......................................................................................................... 21
3.1 F1 - Short Circuit in Heater NTC (R30-14).................................................... 21
3.2 F2 - Open Circuit in Heater NTC (R30-14) ................................................... 22
3.3 F10 - No Water Flow .................................................................................... 22
3.4 F17 - Insufficient Water Flow ........................................................................ 23
3.5 F28 - Too Much Ground Coffee in Brew Unit ................................................ 24
3.6 F38 - Display/Control Electronic EPB (N1-2) and Power Electronic EPL
(1N1-1, 2N1-1) Not Compatible .................................................................... 24
3.7 F40 - Power Electronic EPL Fault (1N1-1, 2N1-1) ........................................ 25
3.8 F41 - EEPROM Faulty/Data Fault ................................................................ 25
3.9 F42 - Line Frequency Not Registered ........................................................... 25
3.10 F73 - Brew Unit Fault .................................................................................... 25
3.11 F74 - Ceramic Valve (M29) Fault .................................................................. 26
3.12 F76 - Brew Unit Compression Fault .............................................................. 27
3.13 F77 - Ceramic Valve (M29) Initialization Fault .............................................. 27
3.14 F80 - Heater (R1) Not Heating ...................................................................... 27
3.15 F82 - Heater (R1) Too Hot ............................................................................ 28
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