TECHNICAL INFORMATION
CVA 640x and CVA 680x Coffee Systems
© 2015 Miele USA
, CVA 640x/680x
Technical Information
Table of Contents
A Warning and Safety Instructions ....................................................................... 7
1 General.................................................................................................................. 7
2 Risk of Burning or Scalding ................................................................................... 7
3 Touch Current Measurement ................................................................................ 8
B Modification History ............................................................................................ 8
C Technical Data ..................................................................................................... 9
D Component Layouts.......................................................................................... 14
1 Optical Interface .................................................................................................. 14
2 Electrical Components ........................................................................................ 15
001 General ............................................................................................................... 21
2 Function............................................................................................................... 21
2.1 Optical Interface ........................................................................................... 21
2.2 Water Paths .................................................................................................. 21
2.2.1 Overview ..................................................................................................21
2.2.2 Water Path – Coffee ................................................................................22
2.2.3 Water Path - Decompression - Coffee ....................................................23
2.2.4 Water Path – Hot Water ..........................................................................23
2.2.5 Water Path – Decompression - Hot Water ..............................................24
2.2.6 Water Path – Milk Froth ...........................................................................24
2.2.7 Water Path – Hot Milk..............................................................................25
2.2.8 Water Path – Cold Rinse .........................................................................25
2.2.9 Water Path – Hot Rinse ...........................................................................26
2.3 Brew Unit Control ......................................................................................... 26
2.3.1 Switch Positions ......................................................................................26
2.3.2 Electronic Grind Amount Compensation .................................................27
2.3.3 Brew Unit Drive, Home Position ..............................................................28
2.3.4 Brew Unit Drive, Compressing Position (Brew Position) .........................29
2.3.5 Brew Unit Drive, Drain Position ...............................................................30
2.4 Waste-Container Monitoring ......................................................................... 31
2.5 Machine Response after a Power Failure ..................................................... 31
2.6 Safety Concept for Water Intake (CVA 6x05 Only) ....................................... 31
3 Fault Repair ......................................................................................................... 32
3.1 F001 -- Coffee/Hot Water NTC (R30-14) Short-Circuited ............................. 32
3.2 F002 -- Coffee/Hot Water NTC (R30-14) Open-Circuited ............................. 32
3.3 F003 -- Steam NTC (R30-13) Short-Circuited .............................................. 33
3.4 F004 -- Steam NTC (R30-13) Open-Circuited .............................................. 33
3.5 F010 -- No Water Intake ............................................................................... 34
3.6 F017 -- Insufficient Water Intake................................................................... 35
3.7 F028 -- Too Much Ground Coffee in Brew Unit ............................................ 36
3.8 F040 - Power Electronic EPL (N1-1) Fault.................................................... 36
3.9 F041 -- EEPROM Faulty/Data Fault ............................................................. 37
3.10 F042 -- Line Frequency Not Registered ....................................................... 37
3.11 F073 -- Brew Unit Fault................................................................................. 37
3.12 F074 -- Ceramic Valve (1M29) Fault ............................................................ 38
3.13 F076 -- Brew Unit Compression Fault .......................................................... 38
3.14 F077 -- Ceramic Valve (1M29) Initialization Fault ......................................... 38
3.15 F080 -- Coffee/Hot-Water Heater (R1-2) Not Heating .................................. 39
3.16 F081 -- Steam Heater (R1-1) Not Heating .................................................... 39
2
,CVA 640x/680x
Technical Information
3.17 F082 -- Coffee/Hot-Water Heater (R1-2) Overheating .................................. 40
3.18 F083 -- Steam Heater (R1-1) Overheating ................................................... 41
3.19 F094 -- Water Intake Fault (CVA 6x05 Only) ................................................ 41
3.20 F225 -- Ceramic Valve (2M29) Fault ............................................................ 42
3.21 F226 -- Ceramic Valve (2M29) Initializing Fault ............................................ 43
3.22 F227 -- Cup-Edge Sensor (1B10) Short-Circuited ........................................ 43
3.23 F228 -- Cup-Edge Sensor (1B10) Open-Circuited ........................................ 43
3.24 F229 -- Cup-Edge Sensor (2B10) Short-Circuited ........................................ 43
3.25 F230 -- Cup-Edge Sensor (2B10) Open-Circuited ........................................ 44
3.26 F233 -- Cup Protection Switch (S86) Not Active ........................................... 44
3.27 F234 -- Cup Protection Switch (S86) Was Activated .................................... 45
3.28 F235 -- Display Electronic EPB (N1-2) Communication Fault....................... 46
3.29 F236 -- Auxiliary Electronic EPZ (N1-25) Communication Fault ................... 46
3.30 "X Servings until Descaling" Shown in Display ............................................. 46
3.31 "Empty Drip Tray" Message, Even Though Drip Tray Is Not Full.................. 46
3.32 "Replace Drip Tray" Message, Even Though Drip Tray Is Inserted .............. 46
3.33 “Empty Waste Container” Message, But Waste Container Is Not Full .......... 47
3.34 ”Fill Milk Container” Message Not Displayed ................................................ 47
3.35 Built-In Depths Different ............................................................................... 47
3.36 Door Jams when Opening ............................................................................ 48
3.37 Coffee or Espresso Too Cold ....................................................................... 48
3.38 Milk Froth Unsatisfactory or Sputtering ......................................................... 48
3.39 No or Very Little Coffee Flowing from Spout................................................. 49
3.40 Coffee Tastes Too Bitter ............................................................................... 49
3.41 Coffee Grounds Next to the Brew Unit ......................................................... 49
3.42 Coffee/Hot Water Pump or Steam Pump Inoperative ................................... 50
3.43 Diagnostic Support Cannot Establish a Connection ..................................... 50
3.44 Pump Running Constantly ............................................................................ 51
3.45 Milk Froth Stream is Inconsistent.................................................................. 51
3.46 Empty Milk Container Not Detected .............................................................. 51
4 Service ................................................................................................................ 52
4.1 Drink Settings (Customer Programming) ...................................................... 52
4.1.1 CVA 640x ................................................................................................52
4.1.2 CVA 680x ................................................................................................53
4.2 Machine Settings (Customer Programming) ................................................. 55
4.2.1 CVA 640x ................................................................................................55
4.2.2 CVA 680x ................................................................................................59
4.3 Service Programming Mode ......................................................................... 63
4.3.1 CVA 640x ................................................................................................63
4.3.2 CVA 680x ................................................................................................64
4.4 Service Mode................................................................................................ 65
4.4.1 CVA 640x ................................................................................................65
4.4.2 CVA 680x ................................................................................................70
4.5 Removing the Appliance from a Cabinet ...................................................... 74
4.6 Top Rear Panel Removal ............................................................................. 74
4.7 Bottom Rear Panel Removal ........................................................................ 75
4.8 Preparing Machine for Servicing ................................................................... 76
4.9 Heater (Steam R1-1 or Coffee/Hot-Water R1-2) Removal ........................... 77
4.10 Heater NTC (Steam R30-13 or Coffee/Hot-Water R30-14) Removal ........... 78
4.11 Heater Temperature Limiter (Steam F1-5 or Coffee/Hot-Water F1-8) Removal
78
4.12 Heater Fuse (Steam F8-1 or Coffee/Hot-Water F8-2) Removal ................... 78
4.13 Pump (Steam M7-1 or Coffee/Hot-Water M7-2) Removal ............................ 78
3
, CVA 640x/680x
Technical Information
4.14 Pump Temperature Limiter (Steam F3-1 or Coffee/Hot-Water F3-2) Removal79
4.15 Ceramic Valve 1M29 Removal ..................................................................... 79
4.16 Ceramic Valve 2M29 Removal ..................................................................... 80
4.17 Inlet Valve Removal (CVA 6x05 Only) .......................................................... 80
4.18 EPL Power Electronic (N1-1) Removal ......................................................... 80
4.19 Coffee Chute Monitor Switch (S87-5) Removal ............................................ 81
4.20 Beans Container Sensor (1B3-14, 2B3-14) Removal ................................... 83
4.21 Grinder (M25) Removal ................................................................................ 84
4.22 Grinder Temperature Limiter (F3-3) Removal............................................... 85
4.23 Brew Unit Drive (M26) Removal ................................................................... 85
4.24 Brew Unit Present Switch (S87-2) Removal ................................................. 87
4.25 Brew Unit Position Switch (S60-1, S60-2) Removal ..................................... 87
4.26 Grind Amount Step Contact Switch (S51-4) Removal .................................. 87
4.27 Door Contact Switch (S24) Removal ............................................................ 87
4.28 Removing the Drip Tray Contact Springs from Inside the Appliance ............ 88
4.29 Water Tank Level Switch (S12-1 or S12-3) Removal ................................... 88
4.30 Flow Meter (B3-4) Removal .......................................................................... 88
4.31 Waste Container Present Switch (S87-4) Removal ...................................... 90
4.32 RemoteVision Module Removal (CVA 680x Only) ........................................ 90
4.33 Inner Door Cover Removal ........................................................................... 90
4.34 Dispenser Adjustment Motor (M19) Removal (CVA 680x Only) ................... 92
4.35 Spout Monitor Switch (S87-6) Removal ........................................................ 93
4.35.1 CVA 640x ................................................................................................93
4.35.2 CVA 680x ................................................................................................93
4.36 Dispensing-Area Light (H3) Removal ........................................................... 95
4.36.1 CVA 640x ................................................................................................95
4.36.2 CVA 680x ................................................................................................95
4.37 Cup Protection Switch (S86) Removal (CVA 680x Only) .............................. 97
4.38 Cup-Edge Sensor (1B10, 2B10) Removal (CVA 680x Only) ........................ 97
4.39 Milk Container Level Sensor (S12-4) Removal ............................................. 98
4.40 Milk Valve (M24) Removal .......................................................................... 100
4.41 Air Valve (M28) Removal ............................................................................ 101
4.42 Auxiliary Electronic EPZ (N1-25) Removal ................................................. 101
4.43 Control Panel and Display Electronic EPB (N1-2) Removal ....................... 102
List of Figures
Figure D-1: Optical Interface for Diagnostic Support and Program Updating ................. 14
Figure D-2: CVA 6401 ..................................................................................................... 15
Figure D-3: CVA 6405 ..................................................................................................... 16
Figure D-4: CVA 6800 ..................................................................................................... 17
Figure D-5: CVA 6805 ..................................................................................................... 19
Figure 001-1: CVA Water Path - Overview ..................................................................... 21
Figure 001-2: Coffee Water Path .................................................................................... 22
Figure 001-3: Coffee Water Path, Decompression ......................................................... 23
Figure 001-4: Hot-Water Path ......................................................................................... 23
Figure 001-5: Hot-Water Path, Decompression .............................................................. 24
Figure 001-6: Milk Froth Path.......................................................................................... 24
Figure 001-7: Hot-Milk Path ............................................................................................ 25
Figure 001-8: Cold-Rinse Path........................................................................................ 25
4
CVA 640x and CVA 680x Coffee Systems
© 2015 Miele USA
, CVA 640x/680x
Technical Information
Table of Contents
A Warning and Safety Instructions ....................................................................... 7
1 General.................................................................................................................. 7
2 Risk of Burning or Scalding ................................................................................... 7
3 Touch Current Measurement ................................................................................ 8
B Modification History ............................................................................................ 8
C Technical Data ..................................................................................................... 9
D Component Layouts.......................................................................................... 14
1 Optical Interface .................................................................................................. 14
2 Electrical Components ........................................................................................ 15
001 General ............................................................................................................... 21
2 Function............................................................................................................... 21
2.1 Optical Interface ........................................................................................... 21
2.2 Water Paths .................................................................................................. 21
2.2.1 Overview ..................................................................................................21
2.2.2 Water Path – Coffee ................................................................................22
2.2.3 Water Path - Decompression - Coffee ....................................................23
2.2.4 Water Path – Hot Water ..........................................................................23
2.2.5 Water Path – Decompression - Hot Water ..............................................24
2.2.6 Water Path – Milk Froth ...........................................................................24
2.2.7 Water Path – Hot Milk..............................................................................25
2.2.8 Water Path – Cold Rinse .........................................................................25
2.2.9 Water Path – Hot Rinse ...........................................................................26
2.3 Brew Unit Control ......................................................................................... 26
2.3.1 Switch Positions ......................................................................................26
2.3.2 Electronic Grind Amount Compensation .................................................27
2.3.3 Brew Unit Drive, Home Position ..............................................................28
2.3.4 Brew Unit Drive, Compressing Position (Brew Position) .........................29
2.3.5 Brew Unit Drive, Drain Position ...............................................................30
2.4 Waste-Container Monitoring ......................................................................... 31
2.5 Machine Response after a Power Failure ..................................................... 31
2.6 Safety Concept for Water Intake (CVA 6x05 Only) ....................................... 31
3 Fault Repair ......................................................................................................... 32
3.1 F001 -- Coffee/Hot Water NTC (R30-14) Short-Circuited ............................. 32
3.2 F002 -- Coffee/Hot Water NTC (R30-14) Open-Circuited ............................. 32
3.3 F003 -- Steam NTC (R30-13) Short-Circuited .............................................. 33
3.4 F004 -- Steam NTC (R30-13) Open-Circuited .............................................. 33
3.5 F010 -- No Water Intake ............................................................................... 34
3.6 F017 -- Insufficient Water Intake................................................................... 35
3.7 F028 -- Too Much Ground Coffee in Brew Unit ............................................ 36
3.8 F040 - Power Electronic EPL (N1-1) Fault.................................................... 36
3.9 F041 -- EEPROM Faulty/Data Fault ............................................................. 37
3.10 F042 -- Line Frequency Not Registered ....................................................... 37
3.11 F073 -- Brew Unit Fault................................................................................. 37
3.12 F074 -- Ceramic Valve (1M29) Fault ............................................................ 38
3.13 F076 -- Brew Unit Compression Fault .......................................................... 38
3.14 F077 -- Ceramic Valve (1M29) Initialization Fault ......................................... 38
3.15 F080 -- Coffee/Hot-Water Heater (R1-2) Not Heating .................................. 39
3.16 F081 -- Steam Heater (R1-1) Not Heating .................................................... 39
2
,CVA 640x/680x
Technical Information
3.17 F082 -- Coffee/Hot-Water Heater (R1-2) Overheating .................................. 40
3.18 F083 -- Steam Heater (R1-1) Overheating ................................................... 41
3.19 F094 -- Water Intake Fault (CVA 6x05 Only) ................................................ 41
3.20 F225 -- Ceramic Valve (2M29) Fault ............................................................ 42
3.21 F226 -- Ceramic Valve (2M29) Initializing Fault ............................................ 43
3.22 F227 -- Cup-Edge Sensor (1B10) Short-Circuited ........................................ 43
3.23 F228 -- Cup-Edge Sensor (1B10) Open-Circuited ........................................ 43
3.24 F229 -- Cup-Edge Sensor (2B10) Short-Circuited ........................................ 43
3.25 F230 -- Cup-Edge Sensor (2B10) Open-Circuited ........................................ 44
3.26 F233 -- Cup Protection Switch (S86) Not Active ........................................... 44
3.27 F234 -- Cup Protection Switch (S86) Was Activated .................................... 45
3.28 F235 -- Display Electronic EPB (N1-2) Communication Fault....................... 46
3.29 F236 -- Auxiliary Electronic EPZ (N1-25) Communication Fault ................... 46
3.30 "X Servings until Descaling" Shown in Display ............................................. 46
3.31 "Empty Drip Tray" Message, Even Though Drip Tray Is Not Full.................. 46
3.32 "Replace Drip Tray" Message, Even Though Drip Tray Is Inserted .............. 46
3.33 “Empty Waste Container” Message, But Waste Container Is Not Full .......... 47
3.34 ”Fill Milk Container” Message Not Displayed ................................................ 47
3.35 Built-In Depths Different ............................................................................... 47
3.36 Door Jams when Opening ............................................................................ 48
3.37 Coffee or Espresso Too Cold ....................................................................... 48
3.38 Milk Froth Unsatisfactory or Sputtering ......................................................... 48
3.39 No or Very Little Coffee Flowing from Spout................................................. 49
3.40 Coffee Tastes Too Bitter ............................................................................... 49
3.41 Coffee Grounds Next to the Brew Unit ......................................................... 49
3.42 Coffee/Hot Water Pump or Steam Pump Inoperative ................................... 50
3.43 Diagnostic Support Cannot Establish a Connection ..................................... 50
3.44 Pump Running Constantly ............................................................................ 51
3.45 Milk Froth Stream is Inconsistent.................................................................. 51
3.46 Empty Milk Container Not Detected .............................................................. 51
4 Service ................................................................................................................ 52
4.1 Drink Settings (Customer Programming) ...................................................... 52
4.1.1 CVA 640x ................................................................................................52
4.1.2 CVA 680x ................................................................................................53
4.2 Machine Settings (Customer Programming) ................................................. 55
4.2.1 CVA 640x ................................................................................................55
4.2.2 CVA 680x ................................................................................................59
4.3 Service Programming Mode ......................................................................... 63
4.3.1 CVA 640x ................................................................................................63
4.3.2 CVA 680x ................................................................................................64
4.4 Service Mode................................................................................................ 65
4.4.1 CVA 640x ................................................................................................65
4.4.2 CVA 680x ................................................................................................70
4.5 Removing the Appliance from a Cabinet ...................................................... 74
4.6 Top Rear Panel Removal ............................................................................. 74
4.7 Bottom Rear Panel Removal ........................................................................ 75
4.8 Preparing Machine for Servicing ................................................................... 76
4.9 Heater (Steam R1-1 or Coffee/Hot-Water R1-2) Removal ........................... 77
4.10 Heater NTC (Steam R30-13 or Coffee/Hot-Water R30-14) Removal ........... 78
4.11 Heater Temperature Limiter (Steam F1-5 or Coffee/Hot-Water F1-8) Removal
78
4.12 Heater Fuse (Steam F8-1 or Coffee/Hot-Water F8-2) Removal ................... 78
4.13 Pump (Steam M7-1 or Coffee/Hot-Water M7-2) Removal ............................ 78
3
, CVA 640x/680x
Technical Information
4.14 Pump Temperature Limiter (Steam F3-1 or Coffee/Hot-Water F3-2) Removal79
4.15 Ceramic Valve 1M29 Removal ..................................................................... 79
4.16 Ceramic Valve 2M29 Removal ..................................................................... 80
4.17 Inlet Valve Removal (CVA 6x05 Only) .......................................................... 80
4.18 EPL Power Electronic (N1-1) Removal ......................................................... 80
4.19 Coffee Chute Monitor Switch (S87-5) Removal ............................................ 81
4.20 Beans Container Sensor (1B3-14, 2B3-14) Removal ................................... 83
4.21 Grinder (M25) Removal ................................................................................ 84
4.22 Grinder Temperature Limiter (F3-3) Removal............................................... 85
4.23 Brew Unit Drive (M26) Removal ................................................................... 85
4.24 Brew Unit Present Switch (S87-2) Removal ................................................. 87
4.25 Brew Unit Position Switch (S60-1, S60-2) Removal ..................................... 87
4.26 Grind Amount Step Contact Switch (S51-4) Removal .................................. 87
4.27 Door Contact Switch (S24) Removal ............................................................ 87
4.28 Removing the Drip Tray Contact Springs from Inside the Appliance ............ 88
4.29 Water Tank Level Switch (S12-1 or S12-3) Removal ................................... 88
4.30 Flow Meter (B3-4) Removal .......................................................................... 88
4.31 Waste Container Present Switch (S87-4) Removal ...................................... 90
4.32 RemoteVision Module Removal (CVA 680x Only) ........................................ 90
4.33 Inner Door Cover Removal ........................................................................... 90
4.34 Dispenser Adjustment Motor (M19) Removal (CVA 680x Only) ................... 92
4.35 Spout Monitor Switch (S87-6) Removal ........................................................ 93
4.35.1 CVA 640x ................................................................................................93
4.35.2 CVA 680x ................................................................................................93
4.36 Dispensing-Area Light (H3) Removal ........................................................... 95
4.36.1 CVA 640x ................................................................................................95
4.36.2 CVA 680x ................................................................................................95
4.37 Cup Protection Switch (S86) Removal (CVA 680x Only) .............................. 97
4.38 Cup-Edge Sensor (1B10, 2B10) Removal (CVA 680x Only) ........................ 97
4.39 Milk Container Level Sensor (S12-4) Removal ............................................. 98
4.40 Milk Valve (M24) Removal .......................................................................... 100
4.41 Air Valve (M28) Removal ............................................................................ 101
4.42 Auxiliary Electronic EPZ (N1-25) Removal ................................................. 101
4.43 Control Panel and Display Electronic EPB (N1-2) Removal ....................... 102
List of Figures
Figure D-1: Optical Interface for Diagnostic Support and Program Updating ................. 14
Figure D-2: CVA 6401 ..................................................................................................... 15
Figure D-3: CVA 6405 ..................................................................................................... 16
Figure D-4: CVA 6800 ..................................................................................................... 17
Figure D-5: CVA 6805 ..................................................................................................... 19
Figure 001-1: CVA Water Path - Overview ..................................................................... 21
Figure 001-2: Coffee Water Path .................................................................................... 22
Figure 001-3: Coffee Water Path, Decompression ......................................................... 23
Figure 001-4: Hot-Water Path ......................................................................................... 23
Figure 001-5: Hot-Water Path, Decompression .............................................................. 24
Figure 001-6: Milk Froth Path.......................................................................................... 24
Figure 001-7: Hot-Milk Path ............................................................................................ 25
Figure 001-8: Cold-Rinse Path........................................................................................ 25
4
