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© 2004 Miele
TECHNICAL INFORMATION
CVA610 Coffee System
1

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Inhalt der Seiten


  • Page 1

    TECHNICAL INFORMATION
    CVA610 Coffee System

    © 2004 Miele



  • Page 2



  • Page 3

    CVA610 Coffee System - Table of Contents
    1.0 CONSTRUCTION & DESIGN
    1.1 Appliance Overview

    1

    1.2 Technical Data

    3

    1.3 Layout of Components

    5

    2.0 INSTALLATION
    Installation Procedures

    7

    3.0 COMMISSION and OPERATION
    3.1 General Operation

    9

    3.1.1 Preparing Coffee

    9

    3.1.2 Canceling the Preparation

    10

    3.1.3 Steam Control

    10

    3.1.4 Hot Water Dispensing

    11

    3.1.5 Adjusting the Coffee Grinder

    12

    3.1.6 Filling the Coffee Bean Container

    13

    3.1.7 Filling the Water Tank

    14

    4.0 DESCRIPTION of FUNCTION
    4.1 Door Switch

    15

    4.2 Overflow Switch

    15

    4.3 Brew Unit – Home Position

    16

    4.4 Brew Unit – Drive & Water Connections

    17

    4.5 Brewing Procedure

    18

    4.6 Waste Unit

    21

    4.7 Waste Unit Present Switch

    21

    4.8 Water Tank

    23

    4.9 Water Level Switch

    24

    4.10 Grinder Assembly

    25

    4.11Grinder – Overload Protection

    26

    4.12 Ground Coffee – Dispensing

    28

    4.13 Brew Unit Drives

    30

    4.14 Water Pump

    32

    4.15 Flow meter

    33

    4.16 Heater – Data

    33

    4.17 Heaters

    34



  • Page 4

    4.0 DESCRIPTION of FUNCTION (Continued)

    4.18 Water Path

    36

    4.18.1 Water Intake

    37

    4.18.2 Water Path - Coffee

    37

    4.18.3 Water Path – Hot Water

    37

    4.18.4 Water Path - Steam

    37

    4.18.5 Steam Valve and Steam Valve Switch

    37

    4.19 Heater Outlet Valve (Nipple)

    38

    4.20 Electronic Assembly

    39

    5.0 SERVICE and MAINTENANCE
    5.1 Lid – Removal

    41

    5.2 Mains Filter – Removal

    41

    5.3 Rear Panel – Removal

    42

    5.4 Adjustment Slide Switch Frame - Removal

    43

    5.5 Door Contact Switch - Removal

    44

    5.6 Base Plate - Removal

    45

    5.7 Drip Tray - Removal

    46

    5.8 Overflow Switch Actuator Float - Removal

    47

    5.9 Overflow Switch - Removal

    48

    5.10 Fluorescent Lamp – Removal

    49

    5.11 Lamp Starter - Removal

    49

    5.12 Rear Door Panel – Removal

    50

    5.13 Fascia Panel Cover – Replacement

    51

    5.14 Selector Switch - Removal

    52

    5.15 Display Module Electronic – Removal

    53

    5.16 Coffee Dispensing Nozzle – Removal

    54

    5.17 Coffee Dispensing Nozzle - Fitting

    55

    5.18 Steam Valve and Steam Valve Switch - Removal

    56

    5.19 Hot Water Nozzle - Removal

    57

    5.20 Hot Water Nozzle - Removal

    58

    5.21 Coffee Temperature - Check

    58

    5.22 Brew Unit – Removal (in start/home position)

    58

    5.23 Brew Unit – Removal (NOT in start//home position)

    59

    5.24 Brew Unit – Installation

    61

    5.25 Brew Unit – Cleaning Procedure

    61



  • Page 5

    5.0 SERVICE and MAINTENANCE (Continued)

    5.26 Brew Unit – Filter Cleaning

    62

    5.27 Brew Unit – Degreasing via the Rinse Cycle

    63

    5.28 Brew Unit – Lubrication

    65

    5.29 Brew Unit – Manual Reset to “Home Position” (Brew Unit Not Installed)

    66

    5.30 Brew Unit Creamer Valve – Removal

    67

    5.31 Brew Unit Handle – Removal

    67

    5.32 Brew Unit Funnel – Removal

    68

    5.33 Brew Unit Ram – Service

    69

    5.34 Water Tank Level Indicator Float – Removal

    71

    5.35 Water Tank Sealing Ring – Removal

    72

    5.36 Lower Section of Tank Valve – Removal

    73

    5.37 Bean Container – Removal

    75

    5.38 Bean Container Guide – Removal

    76

    5.39 Grinder Unit – Disassembly

    77

    5.40 Grinder Unit – Assembly & Basic Setting

    80

    5.41 Grinder Unit – Removal

    81

    5.42 Brew Unit Present Switch – Removal

    83

    5.43 Dispensing Solenoid – Removal

    83

    5.44 Dispenser Switch – Removal

    83

    5.45 Brew Unit Drives – Home Positioning

    84

    5.46 Waterpath / Flowmeter Check

    84

    5.47 Waterpath Leakage Test

    85

    5.48 Water Connections – Releasing

    86

    5.49 Water Connections – Fitting

    87



  • Page 6

    6.0 FAULT DIAGNOSIS
    6.1 Programming Mode

    89

    6.2 Service Mode

    90

    6.3 Displayed Messages

    92

    6.4 Uneven Filling

    94

    6.5 Brew Unit – Can’t be removed from appliance

    94

    6.6 Brew Unit – Can’t be installed

    94

    6.7Grinder Setting – Can’t be set to finer position

    95



  • Page 7

    CVA610 Coffee System – List of Figures
    1-1 Appliance Overview (Exterior)

    1

    1-2 Appliance Overview (Interior)

    2

    1-3 Product Dimensions

    3

    1-4 Overview of Components

    5

    2-1 Installation Information

    7

    3-1 Coffee cup placed under both dispensers

    9

    3-2 Pressing the Coffee Button

    9

    3-3 Displayed Message During Dispensing

    9

    3-4 Canceling the preparation

    10

    3-5 Steam Control

    10

    3-6 Cup placed under hot water dispenser

    11

    3-7 Hot Water Button

    11

    3-8 Grinder Adjustment Control

    12

    3-9 Filling the Coffee Bean Container

    13

    4-1 Door Contact Switch

    15

    4-2 Brew Unit in home position

    16

    4-3 Brew Unit drive connections

    17

    4-4 Brew Unit Filters

    18

    4-5 Brew Unit Components

    19

    4-6 Brew Unit releasing a “puck”

    20

    4-7 Waste Unit Present Switch

    21

    4-8 Waste Unit Magnet

    22

    4-9 Water Tank Valve

    23

    4-10 Water Level Switch

    24

    4-11 Water Level Switch Float

    24

    4-12 Grinder Assembly

    25

    4-13 Grinder Overload Protection Components

    26

    4-14 Grinder Cone Ball Positions

    27

    4-15 Coffee Dispensing Components

    28

    4-16 Dispensing Lever

    29

    4-17 Brew Unit Drive Components

    30

    4-18 Brew Unit Drive Assembly

    31

    4-19 Water Pump

    32

    4-20 Hot Water / Coffee Heater

    34

    4-21 Steam Heater

    35

    4-22 Water Path

    36

    4-23 Heater Drainage Nipple

    38



  • Page 8

    CVA610 Coffee System – List of Figures (Continued)
    4-24 Electronic Board (Layout)

    39

    5-1 Lid and Securing Screws

    41

    5-2 Mains Filter Mounting

    41

    5-3 Rear Panel – Removal

    42

    5-4 Removing the Slide Switch Frame

    43

    5-5 Door Switch

    44

    5-6 Base Plate Removal

    45

    5-7 Drip Tray

    46

    5-8 Overflow Switch Float

    47

    5-9 Overflow Switch

    48

    5-10 Fluorescent Lamp Access and Removal

    49

    5-11 Starter Removal

    49

    5-12 Rear Door Panel – Removal

    50

    5-13 Fascia Panel Cover Assembly

    51

    5-14 Selector Switch

    52

    5-15 Rear View of Front Door w/ Panel Removed

    53

    5-16 Coffee Dispensing Components

    54

    5-17 Steam Valve and Steam Valve Switch

    56

    5-18 Hot Water Valve

    57

    5-19 Brew Unit Connection Socket

    60

    5-20 Brew Unit Connection Socket Retaining

    60

    5-21 Brew Unit Removal

    61

    5-22 Brew Unit Installation

    62

    5-23 Cleaning Tablet being placed into brew unit

    63

    5-24 Brew Unit – lubrication points (1)

    65

    5-25 Brew Unit – lubrication points (2)

    65

    5-26 Moving the Brew Unit to the home position

    66

    5-27 Brew Unit in reset position

    66

    5-28 Brew Unit (output and retaining lugs)

    67

    5-29 Rear of Brew Unit

    68

    5-30 Front of Brew Unit

    68

    5-31 Brew Unit Ram

    69

    5-32 Brew Unit Chamber

    70

    5-33 Brew Unit Ram and Filter Removed

    70

    5-34 Removing cap to tank float

    71

    5-35 Levering off the Lip Seal Cap

    72

    5-36 Removing the Lip Seal

    72

    5-37 Water Tank Lip Seal – Removal

    73



  • Page 9

    CVA610 Coffee System – List of Figures (Continued)
    5-38 Underside view of the CVA610

    74

    5-39 Removing the Bean Container

    75

    5-40 Removing the Beans Container Guide

    76

    5-41 Accessing the Grinder

    77

    5-42 Upper section of the Grinder

    78

    5-43 Grinder

    79

    5-44 Grinder Removal

    81

    5-45 Grinder Coupling

    82

    5-46 Brew Unit Present Switch

    83

    5-47 Water System Connection

    86

    CVA610 Coffee System – List of Tables
    5-1 Programming Mode

    89

    5-2 Service Mode Navigation

    91

    5-3 Displayed Messages (part 1 of 2)

    92

    5-4 Displayed Messages (part 2 of 2)

    93



  • Page 10



  • Page 11

    CVA610 Coffee System
    Technical Information

    1.0

    Construction and Design

    1.1

    Appliance Overview

    Figure 1-1: Appliance Overview (Front & Controls)

    1



  • Page 12

    CVA610 Coffee System
    Technical Information

    Figure 1-2: Appliance Overview (Interior)

    2



  • Page 13

    CVA610 Coffee System
    Technical Information

    1.2

    Technical Data

    Figure 1-3: CVA610 Product Dimensions

    Electrical Information
    The CVA610 Coffee System is equipped with a power cord and a
    molded NEMA 6-15P plug for connection to a 240 (208) V, 15 A, 60
    Hz NEMA 6-15R (receptacle).

    3



  • Page 14

    CVA610 Coffee System
    Technical Information

    4



  • Page 15

    CVA610 Coffee System
    Technical Information

    1.3

    Layout of Components

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14

    Steam Valve Switch
    Door Magnet
    Fluorescent Bulb
    Starter
    Control Panel / Electronic
    Selector Switch
    Thermostat
    PTC Temperature Sensor
    Heater (Coffee & Water)
    Heater (Steam)
    Thermostat
    PTC Temperature Sensor
    Steam Solenoid
    Dispenser Solenoid
    15 Dispenser Switch

    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31

    Figure 1-4: Overview of Components

    5

    Terminal Block
    Flowmeter
    Interference Capacitor
    Electronic Board
    Door Interlock Switch
    Water Pump
    Grinder
    Drive Motor
    Brew Unit Present Switch
    Water Tank Level Switch
    Brew Unit Home Switch
    Overflow Float Switch
    Brew Unit Brew Position Switch
    Waste Unit Present Switch
    Hot Water Valve
    Lamp Ballast



  • Page 16

    CVA610 Coffee System
    Technical Information

    6



  • Page 17

    CVA610 Coffee System
    Technical Information

    2.0

    Installation

    Figure 2-1: Installation Information

    Note

    For further information, refer to the installation section of the
    Operating Manual -OR- the Miele installation Manual.

    7



  • Page 18

    CVA610 Coffee System
    Technical Information

    8



  • Page 19

    CVA610 Coffee System
    Technical Information

    3.

    Commission and Operation

    3.1

    General Operation

    3.1.1

    Preparing Coffee
    1. Place a cup under both coffee dispensers.

    Figure 3-1: Coffee cup placed under both dispensers.

    2. Press the desired coffee button once.

    Figure 3-2: Pressing the coffee button

    The coffee will be prepared.
    The following message will appear in the message window,
    depending on the button pressed:

    Figure 3-3: Displayed Message While Dispensing

    9



  • Page 20

    CVA610 Coffee System
    Technical Information

    3.1.2

    Canceling the Preparation
    Press one of the coffee buttons to stop preparation immediately.

    Figure 3-4: Canceling the preparation

    3.1.3

    Steam Control
    ● Turn the steam ON by turning the steam selector counterclockwise.
    ● Turn the steam OFF by turning the steam selector clockwise.

    Figure 3-5: Steam Control

    10



  • Page 21

    CVA610 Coffee System
    Technical Information

    3.1.4

    Hot Water Dispensing
    1. Place a cup under the hot water dispenser.

    Figure 3-6: Cup placed under hot water dispenser

    2. Press the hot water button. Hot water will be dispensed.
    3. Press the hot water button again to stop the hot water flow.

    Figure 3-7: Hot water button

    Service Tip
    The hot water dispensing stops automatically if…
    a specific volume (cup size) is programmed
    and
    the "Programmed Hot Water" feature is activated.

    11



  • Page 22

    CVA610 Coffee System
    Technical Information

    3.1.5

    Adjusting the Coffee Grinder
    Controls:
    to the left for finer grinding
    to the right for coarser grinding.

    Figure 3-8 Grinder Adjustment Controls

    If the coffee flows too quickly, the beans have been ground too
    coarsely. Adjust the grinder to a finer setting.
    If the coffee trickles, the beans have been ground too finer.
    Adjust the grinder to a coarser setting.

    Note
    You should be able to feel the notches when moving the slide
    control.
    If the slide control will not move:
    Close the machine and dispense a cup of coffee. Then try to
    move the slide control again.

    12



  • Page 23

    CVA610 Coffee System
    Technical Information

    3.1.6

    Filling the Coffee Bean Container
    1. Carefully pull the container outward until the lid is visible.
    2. Lift the lid (as shown in figure 3-9.
    3. Fill the container with coffee beans to about 1" from the top.
    4. Close the lid and push the container back into place.
    5. Shut the appliance door.

    Figure 3-9 Filling the Coffee Bean Container

    Important
    Only put pure espresso or coffee bean in the container. Anything
    else, including ground coffee, hot cocoa, instant coffee, or treated
    coffee beans (flavorings, caramel, or sugar) will damage the
    grinder.

    Service Tip
    Always remove all coffee beans before attempting to remove the
    bean container. Failure to do so will result in the beans spilling out!
    Refer to 5.37 for additional information.

    13



  • Page 24

    CVA610 Coffee System
    Technical Information

    3.1.7

    Filling the Water Tank
    The Water Tank must be cleaned and filled with fresh water before
    each day of use. A reminder will appear in the message
    window when the unit is first turned on.
    1. Open the front of the machine.
    2. Lift the water tank up and out of the appliance.
    3. Open the lid and fill the container with cold drinking water to
    within about 1" (2 cm) of the top.
    Important
    Never add hot water or any other liquids to the water tank.
    4. Close the lid and place the tank in the machine, pushing it
    straight back. Ensure the tank is fully seated into position.

    14



  • Page 25

    CVA610 Coffee System
    Technical Information

    4.0

    Description of Function

    4.1

    Door Switch (S24)
    The Door Switch interrupts the main power circuit when the door is
    opened.

    Figure 4-1: Door Contact Switch (S24)

    4.2

    Overflow Switch (B8/3)
    The Overflow Switch is mounted to the bottom of the casing. The
    associated float (with internal magnet) is located within the drip
    tray. Should a leak develop, water flows into the drip tray. The float
    rises and the Overflow Switch becomes actuated. The electronic
    then displays the “Watersystem Fault” message.

    15



  • Page 26

    CVA610 Coffee System
    Technical Information

    4.3

    Brew Unit – Home Position
    Refer to figure 4-2. The brew unit must be in the “home position”
    before it can be removed from the appliance.

    Fig. 4-2: Brew Unit in the “home” position

    16



  • Page 27

    CVA610 Coffee System
    Technical Information

    4.4

    Brew Unit – Drive and Water Connections
    Refer to figure 4-3.
    When the Brew Unit is installed, it locks into position. The Locking
    Mechanism Switch Lug (item 3), activates the Brew Unit Present
    Switch (item 4). The Drive Shaft (item 6), engages with the Drive
    Shaft Socket (item 1) to provide drive to the Brew Unit.
    When the Brew Unit moves into the “Brewing Position” the Hot
    Water / Water Connection Socket (item 2) connects to the Nozzle
    on the Hot Water / Coffee Heater (item 5).

    1 Drive Shaft Socket
    2 Water Connection Socket
    3 Locking Mechanism Switch Lug
    4 Brew Unit Present Switch
    5 Water Nozzle
    6 Drive shaft
    Figure 4-3: Brew Unit drive connections

    17



  • Page 28

    CVA610 Coffee System
    Technical Information

    4.5

    Brewing Procedure
    1. The output of the Grinder provides ground coffee to the
    Dispenser Housing; until it filled (as determined by the
    dispenser switch).
    2. The Grinder is then powered by off by the Electronic.
    3. The Dispenser Flap opens twice (two clicks can be heard) via
    the Dispenser Solenoid.
    4. The ground coffee falls into the Brew Unit (via the funnel).

    1 Funnel
    2 Percolator chamber
    3 Bottom filter

    Figure 4-4: Brew Unit Filters

    18



  • Page 29

    CVA610 Coffee System
    Technical Information

    Refer to figure 4-5
    5. The Brew Unit Drives move the Brew Unit into the “Brewing
    Position” (as determined by the Brew Position Switch). The
    grounds are compressed between the top filter (item 2) and
    bottom filter (item 5).
    6. The Water Pump is energized to pump the water through the
    Hot Water / Coffee Nozzle and into the Brew Unit via the Water
    Connection Socket (item 4). The hot water forces through the
    brew unit and the compressed grounds (Pos 3) and exits the top
    of brew unit via the drain spout (item 1).
    With the door of the appliance closed, the drain spout makes
    contact with the dispensing system on the front of the appliance.
    The users cup is filled with coffee, as the coffee flow exits.

    1 Percolator Outlet
    2 Top Filter
    3 Compressed Coffee
    4 Water Connection Socket
    5 Bottom Filter
    Figure 4-5: Brew Unit components.

    19



  • Page 30

    CVA610 Coffee System
    Technical Information

    Refer to figure 4-6…
    7. The drives are energized (in reverse) and move the Brew Unit
    toward the “home position” position. As this action occurs the
    coffee chamber moves upward and releases the used
    compressed coffee grounds. (item1).
    8. The drives continue, returning the Brew Unit to the “home
    position” (as determined by the Home Position Switch.

    Figure 4-6: Brew Unit, showing compressed coffee “puck”.

    20



  • Page 31

    CVA610 Coffee System
    Technical Information

    4.6

    Waste Unit
    After coffee has been prepared, the compressed coffee grounds
    “puck” falls into the Waste Unit. The electronic monitors the number
    of the compressed “pucks”, until a specific value is reached. The
    electronic then displays the “Empty Waste Unit” message to the
    user.

    4.7

    Waste Unit Present Switch
    The Waste Unit Present Switch is mounted to the bottom of the
    CVA610 housing (behind the area of the Waste Unit) – as shown in
    the figure 4-7.

    Figure 4-7: Waste Unit Present Switch.

    21



  • Page 32

    CVA610 Coffee System
    Technical Information

    The actuating magnet (Figure 4-8, item 1) for the Waste Unit
    Present Switch is located at the bottom edge of the Waste Unit.

    Figure 4-8: Waste Unit. (1) Magnet for Waste Unit
    Present Switch.

    Note
    On newer manufactured Waste Units, an additional magnet is
    present to keep the waste unit attached to the metal frame inside
    the appliance. The magnet for the Waste Unit Present Switch
    remains in the same location.

    22



  • Page 33

    CVA610 Coffee System
    Technical Information

    4.8

    Water Tank
    Refer to the figure 4-9.
    The Water Tank holds the water for the coffee, hot water and
    steam. When the water tank is fitted in position, the sealing ring
    presses upward so water cannot leak.

    Figure 4-9: Water Tank (1) Valve Assembly.

    When the Water Tank is removed from the appliance; a spring
    forces the sealing ring into a position so water cannot flow from the
    tank.

    23



  • Page 34

    CVA610 Coffee System
    Technical Information

    4.9

    Water Level Switch
    The Water Level Switch is located within the housing, in the area
    behind the Water Tank Cavity (as shown in figure 4-10).

    Figure 4-10: Water Level Switch

    The Actuating Magnet for the Water Level Switch is located within
    the float. The float is then installed into the Water Tank (as shown
    in figure 11, item 1).

    Figure 4-11: Water Level Switch Float

    With the Water Tank installed and containing at least 900-1000
    milliliters of water, the Water Level Switch contacts are closed.
    When the water level drops below the minimum quantity, the Water
    Level Switch contacts open. At this time the quantity incoming
    water is monitored by the Electronic (via the flowmeter). Once 800
    milliliters of water is measured, the “Fill Water Tank” message is
    displayed.

    24



  • Page 35

    CVA610 Coffee System
    Technical Information

    4.10

    Grinder Assembly
    Refer to figure 4-12.

    The grinding grade depends on the gap between the Grinding
    Cone (Item 1) and the Grinding Ring (Item 2).
    The gap is set via the Adjustment Lever, (Item 5) on the
    Adjustment Ring (Item 3). The smaller the gap, the finer the
    grind of coffee will be.

    1 Grinding cone
    2 Grinding ring
    3 Adjustment ring
    4 Intake worm gear
    5 Adjustment lever
    6 Handle
    Figure 4-12: Grinder Assembly

    Warning!
    To avoid binding the grinder, adjustments should be made in small
    steps.

    25



  • Page 36

    CVA610 Coffee System
    Technical Information

    4.11

    Grinder - Overload Protection
    Should the grinder become blocked by a foreign object (i.e. stone /
    pebble), the slip coupling interrupts the drive between the motor
    and the grinder.
    Refer to figure 4-13…
    The Grinder Motor (item 1) drives the Mounting (item 3) via the
    Carriers (item 2). This rotary force transfers through the Balls, (item
    5) to the Grinder Cone (Item 6).

    1 Grinder motor
    2 Carrier
    3 Mounting
    4 Spring
    5 Ball
    6 Grinding cone
    7 Washer
    8 Intake worm gear
    Figure 4-13: Components of the Grinder Overload Protection

    26



  • Page 37

    CVA610 Coffee System
    Technical Information

    Should the grinder cone become blocked, the Balls get pressed into
    the Mounting (as shown below in figure 4-14, Item C) resulting in
    the drive force being interrupted.

    A Normal operation
    B Overload protection activated
    C Force transfer interrupted
    Figure 4-14: Grinder cone ball positions under various operating conditions.

    27



  • Page 38

    CVA610 Coffee System
    Technical Information

    4.12

    Ground Coffee - Dispensing
    Refer to figure 4-15.
    By adjusting the Dispenser Lever (item 1), the position of the
    Dispensing Switch (item 2) is modified. The change results in
    change to the volume of the dispenser container; hence the
    quantity of ground coffee changes. Each position along the setting
    alters the coffee quantity by about 0.5 grams.
    The grinder fills the dispenser container with ground coffee. When
    the dispenser container is full, the Dispenser Switch is activates
    and the grinder motor is switched off.

    1 Dispenser Lever
    2 Dispensing Switch (1S13)
    3 Catch - Switch - Dispensing
    4 Catch - Coil - Dispensing
    5 Coil - Dispensing (1L1)
    6 Spring
    7 Actuator
    8 Bolt
    9 Dispenser Flap
    10 Wiper
    Figure 4-15: Coffee Dispensing Components

    28



  • Page 39

    CVA610 Coffee System
    Technical Information

    Figure 4-16: Dispensing Lever

    The dispensing solenoid is activated twice by the electronic. During
    the initial activation the ground coffee drops into the brew unit. The
    second activation is to ensure no loose grounds block the channel,
    as the wiper passes and loosens any ground coffee residues.
    If the dispenser container is not filled (i.e. no coffee beans)
    the Dispenser Switch is not activated and the “Fill Coffee Beans”
    message is displayed.

    29



  • Page 40

    CVA610 Coffee System
    Technical Information

    4.13

    Brew Unit Drives
    Refer to figure 4-17…
    The Brew Unit locks into position against the Drives Mounting
    Plate. The locking mechanism Switch Lug (Item 3) activates the
    Brew Unit Present Switch (Item 4). The Drive Shaft, (Item 6)
    engages with the Percolator Drive Shaft Socket,
    1 Drive Shaft Socket
    2 Socket
    3 Locking Mechanism & Switch Lug
    4 Brew Unit Present Switch
    5 Coffee / Hot Water Heater Nozzle
    6 Drive Shaft

    Figure 4-17: Components of the Brew Unit Drive Assembly.

    30



  • Page 41

    CVA610 Coffee System
    Technical Information

    Refer to figure 5-18.
    The Drive Motor (Item 4) powers the Worm Gear (Item 3). The drive
    action is transferred to the Step-down Gear and then the Drive
    Gear. The center of the Drive Gear contains the Drive Shaft that
    connects to the Brew Unit Drive Shaft Socket. The drive gear The
    drive shaft cog wheel has two switch actuators, (Items 2 & 5) for the
    limit switches for the brew position and home position. The
    electronic unit registers the brew position and the home position via
    the limit switches, (Items 1 and 7).

    1
    2
    3
    4
    5
    6
    7

    Switch – home position switch
    Switch actuator – home position
    Bearing bush
    Brew unit drive motor
    Switch actuator – brew position
    Fitting marking
    Switch – brew position

    Figure 4-18: Brew Unit Drive Assembly

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    4.14

    Water Pump
    The pump is self-priming and can develop a pressure of up to
    approx. 16 bar. For espresso preparation a pressure of approx. 8
    bar is required so that the water can be forced through the
    compressed ground coffee. A further increase in pressure does not
    improve beverage quality.
    The pump is fitted with a safety valve which opens at 16 bar system
    pressure. If pressure is too high, water is passed from the safety
    valve via a hose to the fitting plate and from there to the housing
    under the percolator unit. The water is then passed through the
    door rear panel to the drip tray.
    The pump is connected in series with a temperature limiter. The
    temperature limiter switches off the pump if a high temperature is
    developed.

    Figure 4-19: Water Pump

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    4.15

    Flow meter
    All water taken from the water container flows through the flow
    meter. The flow meter passes signals to the electronic unit
    proportional to the quantity of water passing through it.
    The electronic unit then establishes the quantity of water that has
    flowed and stores the figure. Approx. 300 pulses from the flow
    meter indicate a flow of 100 ml water.
    The electronic unit controls the required water quantity for beverage
    preparation and ensures that it remains constant. The service mode
    can be used to check the proper operation of the flow meter.

    4.16

    Heater - Data
    Coffee / Hot Water Heater 1R1 & 1R2
    Voltage 220(240) V
    Power rating 1090 W / 437 W

    Steam Heater 2R1
    Voltage 220(240) V
    Power rating 1100 W

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    4.17

    Heaters
    Refer to the figure 4-20…
    The Coffee / Hot Water consist of a large heater element (Item 1)
    and a smaller heater element (item 7). The Steam Heater has
    consist of one heater element (figure 4-21, Item 3).
    Each Heater uses a temperature sensor (Item 5) that provides
    signals to the Electronic to monitor the temperature ; and control
    the cycling (switching) of the Heater Element(s).
    Additionally, each Heater assembly is equipped with a Temperature
    Monitor (Item 3) connected electrically in series with the element.
    Should the temperature become excessive, the device electrically
    interrupts the power to the heater element.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10

    Heater element
    Connector
    Temperature monitor
    Temperature safety fuse
    PTC Temperature sensor
    Temperature safety fuse
    Heater element - Small
    Connector
    Mounting
    Outlet

    Figure 4-20: Hot Water / Coffee Heater (1R1 and 1R2)

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    The heating circuit also contains a Temperature Activated Safety
    Fuse. Should the temperature exceed a specific threshold due to
    an operating fault, the fuse blows and interrupts power to the
    element(s).
    Should this fuse be blown, the cause must be located and resolved
    before replacing the fuse.

    1
    2
    3
    4
    5
    6

    Temperature monitor (thermostat)
    Temperature safety fuse
    Heater element
    Connector - Pressure system to steam valve in door
    Connector - Pressure system from steam valve (solenoid valve)
    PTC Temperature sensor (2R30)

    Figure 4-21: Steam Heater (2R1)

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    4.18

    Water Path

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14

    Water tank
    Sealing ring
    Water filter
    Flow meter
    Pump
    Valve - Safety
    Drain hose - Excess pressure
    Through-flow heater - Coffee
    Outlet to brew unit (nipple)
    Valve - Steam (solenoid valve)
    Valve - Hot water (solenoid valve)
    Through-flow heater - Steam
    Valve - Steam (in door)
    Frothing nozzle

    Figure 4-22: Water Path

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    4.18.1

    Water Intake
    The Water Pump is responsible for taking in water from the Water
    Tank. The bottom of the pump contains a safety valve. The valve is
    designed to open should the system pressure exceed 16 bar (232
    psi). A hose is connected to the valve to route the water away from
    the components.

    4.18.2

    Water Path - Coffee
    Water exiting the Water Pump is pumped under pressure through
    the Flowmeter, through the Coffee / Hot Water Heater and through
    the Heater Outlet Valve (Nipple) into the Brew Unit. Water passes
    through the compressed coffee grounds and exits the Brew Unit as
    coffee. The coffee then flows to the dispenser tubes on the front of
    the appliance into the user cup.

    4.18.3

    Water Path - Hot water
    Water exiting the Water Pump is pumped under pressure through
    the Flowmeter, through the Coffee Heater and through the Hot
    Water Valve and Hot Water Outlet.

    4.18.4

    Water Path - Steam
    Water flows the same as the hot water system, except the water
    exiting the Coffee / Hot Water Heater is routed via Steam Solenoid
    into the Steam Heater. Steam exits the Steam Heater and exits via
    the Steam Valve and Frothing Nozzle.

    4.18.5

    Steam Valve and Steam Valve Switch
    The Steam Valve is a mechanical valve regulated via a knob on the
    front of the appliance. As the knob is turned counterclockwise the
    amount of steam exiting the valve increases.
    The Steam Valve Switch is mounted to the Steam Valve Bracket.
    When the Steam Valve is opened, the Steam Valve Switch is
    actuated.
    The switch is monitored by the Electronic and when actuated, the
    Electronic energizes the Steam Solenoid (routing the exiting water
    from the Coffee / Hot Water to the Steam Heater).

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    4.19

    Heater Outlet Valve (Nipple)
    The Heater Outlet Valve is normally closed. However, during the
    brewing process the Brew Unit is driven into the “Brew Position and
    mechanically opens valve. This allows the hot water (under
    pressure) to flow through the brew unit.
    The Heater Outlet Valve uses several o-rings to ensure the
    connection between the Outlet Valve and the Brew Unit remain air
    and water tight. This ensures air does not entering the water path
    and disrupt the proper flow and pressure; and water does leak from
    the system.

    Figure 4-23: Heater Drainage (Nipple)

    The two o-rings that form the seal to the brew unit can be accessed
    and replaced from the front / inside area of the appliance - once the
    brew unit removed.
    To access the upper seal or for service on the valve; the Heater
    Assembly must be removed from the appliance. This permits easy
    disassembly of the valve for a thorough inspection. Although
    components of the valve are available separately, it is highly
    recommended the three components be replaced at one time.

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    4.20

    Electronic Assembly

    Figure 4-24: Preview of Electronic Board Assembly

    For further information on the electronic modes
    – refer to section 6 “Fault Diagnosis”

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    40



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    5.0

    Service and Maintenance

    5.1

    Lid - Removal
    1. Remove the lid screws, as shown in Figure 5-1
    2. Remove the lid.

    Figure 5-1: Lid and securing screws

    5.2

    Mains Filter (Z1) - Removal
    1.
    2.
    3.
    4.

    Perform: Lid removal (5.1).
    Remove the mains filter nut (Figure 2 - Item 1).
    Remove the Filter.
    Disconnect the mains filter electrical connections

    Figure 5-2: Mains Filter (Z1) Mounting Location

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    5.3

    Rear Panel - Removal
    1.
    2.
    3.
    4.
    5.

    Remove the lid (5.1).
    Remove the Mains Filter (5.2).
    Remove the fixing screws from the rear panel.
    Disconnect the earth lead from the rear panel.
    Remove the rear panel upwards.

    Figure 5-3: Rear Panel Removal

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    5.4

    Adjustment Slide Switch Frame - Removal
    1. Open the door.
    2. Pull off the slide switch knobs.
    3. Press the retaining lugs inwards with a small screwdriver
    (Figure 5-4).
    4. Remove the frame.

    Figure 5-4: Removing the Adjustment Slide Switch Frame (Bezel).

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    5.5

    Door Contact Switch (S24) - Removal
    Refer to figure 5-5 below…
    1.
    2.
    3.
    4.
    5.

    Remove the lid (5.1)
    Open the door.
    Disconnect the door switch connections.
    Press the switch retaining lugs inwards with a small screwdriver.
    Remove the door switch to the front.

    Figure 5-5: Door Switch (shown with appliance door in open position)

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    5.6

    Base Plate - Removal
    1.
    2.
    3.
    4.
    5.

    Remove the Lid, Mains and Rear Panel (5.1 to 5.3)
    Open the door.
    Remove the grounds container.
    Remove the water tank.
    Check if water is present in the drip tray with a finger through
    the opening under the water container.
    6. If water is present, remove it via a suitable device / tool.
    7. Remove the percolator unit.
    8. Remove the coffee beans from their container.
    9. Remove the base plate fixing screws.
    10. Tilt the unit onto its rear.
    11. Remove the base plate and disconnect its earth lead.

    Figure 5-6: Base Plate – Removal

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    5.7

    Drip Tray - Removal
    1. Remove the Lid, Mains and Rear Panel (5.1 to 5.3)
    2. Remove the Base Plate (5.6)
    3. Remove the drip tray.

    Figure 5-7: Drip Tray

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    5.8

    Overflow Switch Actuator Float - Removal
    1. Remove the Lid, Mains and Rear Panel (5.1 to 5.3)
    2. Remove the Base Plate (5.6)
    Note
    The orientation of the float before removal – ensure it is re-installed
    in the same direction.
    3. Remove the Float.

    Figure 5-8: Overflow Switch Float

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    5.9

    Overflow Switch (B8/3) - Removal
    1.
    2.
    3.
    4.

    Remove the Lid, Mains and Rear Panel (5.1 to 5.3)
    Remove the overflow switch fixing screw (Figure 9 – Item 1).
    Remove the overflow switch.
    Disconnect the overflow switch connections from the electronic.

    Figure 5-9: Overflow Switch

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    5.10

    Fluorescent Lamp - Removal
    Refer to the figure 5-10 below…
    1. Open the door.
    2. Unclip the cover and remove it.
    3. Turn the lamp tube 90° in the direction to remove the lamp.

    Figure 5-10: Fluorescent Lamp Access and Removal.

    5.11

    Lamp Starter - Removal
    Refer to the figure 5-11 below…
    1. Open the door.
    2. Unclip the neon tube cover and remove it.
    3. Turn the starter in the direction of the arrow.
    4. Remove the starter.

    Figure 5-11: Starter Removal

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    5.12

    Rear Door Panel - Removal
    Refer to figure 5-12.
    1. Open the door.
    2. Remove the upper rear panel fixing screws (Item 1).
    3. Remove the lower rear panel fixing screws (Item 2).

    Figure 5-12: Rear Door Panel – Removal.

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    5.13

    Fascia Panel Cover – Removal
    1. Open the door.
    2. Remove the Rear Door Panel (5.12).
    3. Remove the cover fixing screws (Figure 12 – Item 3).
    4. Remove the cover.

    1 Fascia
    2 Cable guide
    3 Fixing screws
    4 Cover
    5 Magnet
    6 Cable guide

    Figure 5-13: Fascia Panel Cover Assembly

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    5.14

    Selector Switch - Removal
    Refer to figure 5-14.
    1. Open the door.
    2. Remove the Rear Door Panel and Fascia Panel Cover
    (5.12 & 5.13).
    3. Disconnect the connections from the selector switch,
    4. Remove the switch knob (Item 9).
    5. Remove the selector switch with its housing from the fascia.
    6. Remove the selector switch fixing screws.
    7. Remove the selector switch from its housing.

    Figure 5-14: Selector Switch

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    5.15

    Display Module Electronic - Removal
    Refer to figure 5-15.
    1. Open the door.
    2. Remove the Rear Door Panel and Fascia Panel Cover
    (5.12 & 5.13).
    3. Pull off the pushbutton knobs (Item 1).
    4. Disconnect the connections from the electronic (Item 7).
    5. Remove the electronic unit fixing screws (Item 6).
    6. Remove the electronic unit.
    7. Remove the display module fixing screws (Item 3).

    1
    2
    3
    4
    5
    6

    7

    Pushbuttons
    Display module,
    Display module fixing screws
    Display module and electronic unit connection
    Control and power modules connection
    Electronic unit fixing screws
    Electronic unit

    Figure 5-15: Rear View of Front Door with Rear Panel Removed.

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    5.16

    Coffee Dispensing Nozzle - Removal
    Refer to Figure 5-16.
    1. Open the door.
    2. Remove the grille and drip tray from the door.
    3. Remove the fixing screws from the white panel under and
    behind the nozzle.
    4. Remove the white panel.
    Note
    The two fixing screws for the moveable coffee-dispensing nozzle
    are on the rear of the dispenser unit.

    5. Remove the 2 screws from the coffee-dispensing nozzle
    by hand.
    6. Pull out the hose (Item 6), from the outlet, (Item 7).
    7. Pull out the moveable coffee dispensing nozzle (Item 9),
    to its end stop.
    8. Unclip the outlet and remove it.
    9. Remove the moveable coffee dispensing nozzle.

    1 Fixing screw
    2 Drip tray
    3 Underlay
    4 Outlet
    5 Cable holder
    6 Connection hose
    7 Outlet
    8 Retainers
    9 Moveable dispensing nozzle
    10 Cover

    Figure 5-16: Components of the Coffee Dispensing Nozzle.

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    5.17

    Coffee Dispensing Nozzle - Fitting
    Refer to figure 5-16.
    1. Slide the outlet (Item 7), onto the connection hose (Item 6).
    2. Position the moveable coffee dispensing nozzle, (Item 9), in the
    cover (Item 10).
    3. Clip the outlet (Item 7), in the cover (Item 10).
    Note
    The two fixing screws for the coffee dispensing nozzle should be
    tightened by hand only as they can easily be over tightened.
    4. Fit the Coffee Dispensing Nozzle in the frame. Using a suitable
    bit, tighten the two fixing screws by hand.
    5. Refit the white panel and screw it in position.

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    5.18

    Steam Valve and Steam Valve Switch (S79) – Removal
    Refer to Figure 5-17.
    1. Open the door.
    2. Remove the Rear Door Panel and Fascia Panel Cover
    (5.12 & 5.13).
    3. Pull off the switch knob (Item 8).
    4. Remove the holder fixing screws (Item 3).
    5. Remove the holder.
    6. Remove the steam generator switch screws (Item 10).
    7. Remove the steam generator switch.
    8. Disconnect the steam generator switch connections.

    1 Switch - Steam generator (S79)
    2 Underlay
    3 Fixing screws - Holder
    4 Fixing screws - Valve housing
    5 Holder
    6 Valve housing - Steam
    7 Valve insert - Steam
    8 Switch knob
    9 Switch feeler
    10 Fixing screw - Switch
    Figure 5-17: Components of Steam Valve and Steam Valve Switch

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    5.19

    Hot Water Nozzle – Removal
    Refer to figure 5-18.
    1. Open the door.
    2. Remove the Rear Door Panel and Fascia Panel Cover
    (5.12 & 5.13).
    3. Loosen the nut (Item 2).
    4. Remove the holder (Item 5).
    5. Unscrew the sleeve, (Item 1) from the connector (Fig. 6).
    6. Pull out the hot water nozzle (Item 3), from the connector.

    1 Sleeve
    2 Nut
    3 Hot water nozzle
    4 Fixing screws - Holder
    5 Holder
    6 Connector
    7 Hot water valve (Y12)
    Figure 5-18: Hot Water Valve Components

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    5.20

    Hot Water Valve (Y12) – Removal
    Refer to figure 5-18.
    1. Open the door.
    2. Remove the Rear Door Panel and Fascia Panel Cover
    (5.12 & 5.13).
    3. Disconnect the connections from the hot water valve (Item 7).
    4. Loosen the hot water valve nuts.
    5. Pull out the hot water valve from the connector (Item 6).

    5.21

    Coffee Temperature - Check
    1. Set the grinding grade to medium.
    2. Set the coffee quantity to medium.
    3. Set the coffee (medium size) temperature to medium (standard
    setting).
    4. Set the number of pulses for the flow meter for 1 coffee to 350
    (standard setting), see — . Diagnosis mode.
    5. Prepare 3 coffees (medium size) one after the other.
    6. When the fourth coffee is being dispensed, hold the sensor
    probe directly in the flow of coffee.
    If the temperature at the coffee dispenser is 171o F - 194o F the
    unit is in order.

    5.22

    Brew Unit — Removal (in start/home position)
    1.
    2.
    3.
    4.

    Open the door.
    Remove the grounds container.
    Hold the handle and press on the part marked PRESS.
    Remove the percolator from the unit.

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    5.23

    Brew Unit — Removal ( NOT in
    start/home position)
    Warning
    This procedure will remove the brew unit from the appliance without
    damages. However.., after the brew unit is removed; the drives
    must be carefully inspected (and repaired if necessary) then placed
    into the start (home) position via the service mode.
    Before performing this procedure close the front door, turn the
    power on to initiate a drive reset during the start-up sequence.
    Once “Ready...” is displayed; open the front door and attempt to
    remove the brew unit. If the brew unit still cannot be easily
    removed, continue as follows:
    Refer to figures 5-19 and 5-20.
    1.
    2.
    3.
    4.

    Open front door - Remove the waste container.
    Locate the Philips screw (Figure 19 – Item 2).
    Remove the Philips screw.
    Use a small flat tip screwdriver to left up on the retaining tab
    (Figure 20).
    5. Grasp the brew unit handle and pull the brew unit out till the
    connection socket on the brew unit (Figure 19 – Item 1)
    unsnaps from the brew unit and remains inside the appliance
    attached to the water nozzle.
    6. Remove the brew unit.
    7. Slide the connection down to remove it from the appliance.
    8. Re-~install the connection socket to the brew unit.
    9. Carefully inspect the drives for defects.
    10. Test the starting (home) switch and brew unit position switch for
    proper operation.

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    Figure 5-19: Brew Unit (1) Connection Socket (2) Retaining Screw

    Figure 5-20: Brew Unit Connection Socket Retaining Screw and Retaining Tab.

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    5.24

    Brew Unit - Installation
    Slide the brew unit into position in the appliance until the locking
    mechanism engages with the drive mounting plate.
    Note
    Do not press the part marked PRESS during the installation of the
    brew unit.

    5.25

    Brew Unit – Cleaning Procedure
    Note
    - Clean the brew unit by hand only. The moving parts and the
    rubber gaskets SHOULD NOT be cleaned in a dishwasher.
    - Lubricate the brew unit with silicon every 500 cups (see
    "Lubricating the brew unit").
    1. Remove the waste unit. The brew unit can only be removed
    after the waste unit has been taken out.
    2. Grasp the brew unit by the handle and press with the thumb on
    "PRESS". (Figure 21 – Item 1).

    Figure 5-21: Brew Unit – Removal for Cleaning

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    3. Pull the brew unit out (Figure 21 – Item 2).
    4. Clean the brew unit thoroughly under running warm water
    without detergent.
    5. Rub away coffee residues from the steel filters with a sponge.
    6. Dry the funnel to prevent ground coffee from sticking.
    7. After cleaning press "PRESS".

    Figure 5-22: Brew unit installation

    8. Push the brew unit in the track straight into the appliance
    without pressing "PRESS" until it clicks in place.

    5.26

    Brew Unit – Filter Cleaning
    1. Wipe away coffee residues from the steel filter in the funnel of
    the brew unit with a sponge.
    2. The filters can be removed for thorough cleaning.
    3. Remove the brew unit.
    4. Fit a 5mm Allen Wrench to the connection point in the brew unit.
    Turn counterclockwise while supporting the chrome filter from
    below. Remove the filter by lifting it from the brew unit.
    5. Access the second filter by placing a long shaft Philips
    Screwdriver through the center of the funnel and remove the
    screw in the center of the filter.
    6. Manually move the brew unit into the “brew position”.
    7. Turn brew upside down – filter will fall out.
    8. Clean both sides of the filter with hot water and dry.
    9. Re-install the second filter back in position.
    10. Manually move the brew unit to the “home position”
    11. Re-install the Philips screw in the center of the filter.
    12. Return the first filter to the brew unit and secure by turning the
    Allen Wrench clockwise.

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    5.27

    Brew Unit - Degreasing via the Rinse Cycle
    Note
    The natural oil found in coffee can cause the brew unit to clog. The
    message "Rinsing cycle" will flash in the message window after 500
    cups to remind you to clean the unit using “cleaning tablets”
    These specialty-cleaning tablets can be purchased from Miele via
    the Technical Support Center at 1-800-999-1360.
    1. Remove the waste unit.
    2. Take out the brew unit and put the detergent tablet in the brew
    unit funnel. Fig. 5-23.

    Figure 5-23: Cleaning tablet being placed into the brew unit funnel.

    3. Return the brew unit and waste unit to the appliance and close
    the door.
    4. Set a 3 cup (25 oz) container under the coffee dispensers.
    5. Press the rinse/ pre-warm button. (The unit must be pre-heated
    and ready to use otherwise the button will not respond.)
    6. The display will read:

    7. Press

    to select "Rinsing cycle" with the asterisk.

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    8. Press ENTER. The display will read:

    A small amount of water will flow out the coffee dispensers.
    After a pause more water will flow out. This process will run 4
    times, dispensing 2 cups (17 oz) of hot water. The whole
    process lasts about 5 minutes.

    At the end of the cleaning cycle the display will read:

    The brew unit is now clean and ready to use.

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    5.28

    Brew Unit – Lubrication
    1. Remove the Brew Unit.
    Note
    Check that the brew unit is in the basic position with the
    funnel slightly lifted and the socket in vertical position.
    Ensure the correct lubricant (Miele P/N 5132001) is used
    for this procedure. Lubricant is available through the Miele
    Technical Support Center at: 1-800-999-1360.
    2. Refer to figure 5-24 below; lubricate the following:
    A: joints
    B: axel
    C: tracks
    D: gasket

    Figure 5-24: Brew unit lubrication points

    3. Refer to figure 25 below; lubricate the following:
    E: bolt assembly
    F: joints

    Figure5-25: Brew unit lubrication points

    4. Re-Install the Brew Unit into the appliance.

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    5.29

    Brew Unit – Manual Reset to “Home Position”
    (Brew Unit not installed in appliance)
    Refer to figure 5-26
    3. Press on the latch A; and press the funnel down B.
    4. Push the connection piece to the far left position C.
    5. Press "PRESS" once.

    Figure 5-26: Moving the brew unit to home position.

    6. The “home” position (Figure 27) after resetting the Brew Unit.
    The Brew Unit can now be reinstalled into the appliance.

    Figure 5-27: Brew unit in reset position.

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    5.30

    Brew Unit Creamer Valve - Removal
    1.
    2.
    3.
    4.

    5.31

    Remove the Brew Unit
    Remove the output fixing screws.
    Remove the output.
    Remove the spring with Creamer Valve.

    Brew Unit Handle - Removal
    1. Remove the Brew Unit from the appliance.
    2. Press the handle retaining lugs inwards (Figure 5-28).
    3. Remove the handle.

    Figure 5-28: Brew Unit Highlighting the Output Assembly (Covers the Creamer
    Valve) and the Retaining Lugs Securing the Handle to the Assembly.

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    5.32

    Brew Unit Funnel - Removal
    1. Remove the Brew Unit from the appliance.
    2. Press the funnel locking lug (Figure 29, Item 1), so that the
    funnel is no longer raised.
    3. Lever the funnel upwards out of its holder (Figure 5-30).
    Note
    When refitting the Funnel, ensure the spring (Figure 5-30, Item 1)
    is seated correctly.

    Figure 5-29: Rear of Brew Unit, highlighting the funnel lock

    Figure 5-30: Front of Brew Unit, showing spring location and holder

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    Technical Information

    5.33

    Brew Unit Ram - Service
    1. Remove the Brew Unit from the appliance.
    2. Remove the funnel (5.32).
    3. Remove the bottom filter screw and filter
    (Figure 5-31, Items 1 &2).

    Figure 5-31: Releasing the ram from the bottom of the Brew Unit.

    4. Unclip the lever from the ram.
    5. Pull the ram outward to remove from the brew unit.

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  • Page 80

    CVA610 Coffee System
    Technical Information

    6. Clean the brewing chamber (Figure 32), ram and bottom filter by
    hand with warm water without detergent, then dry.
    7. Apply silicone grease to the ram lubrication points
    (Figure 5-33, Item 3).

    Figure 5-32: Brewing unit chamber inside the brew
    unit assembly.

    Figure 5-33: Ram assembly. (1) Filter Screw
    (2) Filter (3) Lubrication points

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  • Page 81

    CVA610 Coffee System
    Technical Information

    5.34

    Water Tank Level Indicator Float - Removal
    1.
    2.
    3.
    4.

    Open the door.
    Remove the Water Tank.
    Lever off the cap from the Water Tank level indicator.
    Remove the Water Tank level indicator.

    Figure 5-34: Removing the cap to access the float in the Water Tank

    71



  • Page 82

    CVA610 Coffee System
    Technical Information

    5.35

    Water Tank Valve Sealing Ring - Removal
    1. Open the door.
    2. Remove the Water Tank.

    Figure 5-35: Levering off the Lip Seal Cap.

    3. Lever off the Lip Seal Cap (Figure 35).
    4. Remove the Lip Seal (Figure 16, Item 1).

    Figure 5-36: Removing the Lip Seal

    72



  • Page 83

    CVA610 Coffee System
    Technical Information

    5.36

    Lower Section of Tank Valve - Removal
    1.
    2.
    3.
    4.

    Open the door.
    Remove the Water Tank.
    Lip seal removal.
    Remove the lower part of the valve fixing screws
    (Figure 37 – Item 1).

    Figure 5-37: Water Tank Lip Seal - Removal.

    73



  • Page 84

    CVA610 Coffee System
    Technical Information

    5. Remove the Bottom Plate and Drip Tray (5.6 & 5.7)
    6. Disconnect the lower part of the valve connections,
    7. Remove the lower part of the valve.

    Figure 5-38: Underside view of the CVA610 with Base Plate and
    Drip Tray removed.

    74



  • Page 85

    CVA610 Coffee System
    Technical Information

    5.37

    Bean Container - Removal
    1. Open the door.
    2. Remove the Beans Container end stop screw (Figure 39).
    3. Hold a suitable vessel under the container to collect the beans
    that will fall from the opening in the Beans Container.

    Figure 5-39: Removing the Bean Container.

    75



  • Page 86

    CVA610 Coffee System
    Technical Information

    5.38

    Bean Container Guide - Removal
    1.
    2.
    3.
    4.
    5.
    6.

    Open the door.
    Perform the Beans Container. (5.37)
    Remove the Waste Container, Brew Unit and Water Tank.
    Remove the Top Lid (5.1).
    Remove the screws (Figure 5-40 - Item 2).
    Remove the guide and carrier, (Figure 5-40 – Item 1).

    Note
    When refitting, first fit the carrier (Figure 5-40 – Item 1), in position
    and then fit the guide on the carrier.

    Figure 5-40: Removing the Beans Container guide

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  • Page 87

    CVA610 Coffee System
    Technical Information

    5.39

    Grinder Unit - Disassembly
    Note
    The grinder ring (Figure 5-41, Item 5), and grinder cone
    (Figure 41 – Item 6), should always be replaced together.
    1.
    2.
    3.
    4.
    5.
    6.

    Open the door.
    Remove the Beans Container. (5.37).
    Remove the Waste Container, Brew Unit and Water Tank.
    Remove the Top Lid (5.1).
    Remove the Beans Container Guide removal (5.38).
    Set the Grinding Adjustment Lever to the mid setting.

    Figure 5-41: Accessing the grinder

    7. Pull off the handle (Figure 5-41, Item 1).
    8. Remove the adjustment lever fixing screws
    (Figure 5- 41, Item 2).
    9. Remove the lever.

    77



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    CVA610 Coffee System
    Technical Information

    10. Turn the adjustment ring (Figure 5-42, Item 1),
    counterclockwise until the blue marking aligns with the blue
    marking on the carrier (Figure 5-42, Item 2).

    Figure 5-42: Upper Section of Grinder (1) Adjustment Ring, (2) Carrier & (3)
    Bracket.

    11. Remove the bracket (Figure 5-42, Item 3)
    12. Remove coffee residues, e.g. with a vacuum cleaner.
    Note
    The grinding cone fixing screw has a left-hand thread.
    13. Remove the grinding cone fixing screw (Figure 5-43, Item 1) by
    turning it clockwise.
    14. Remove the intake worm gear (Figure 5-43, Item 2).
    15. Remove the washer (Figure 5-43, Item 3).

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    CVA610 Coffee System
    Technical Information

    Note
    When the grinding cone (Figure 5-43, Item 6), is removed the balls,
    (Figure 5-43, Item 8), may stick to it and then fall off.
    Refer to figure 5-43.
    16. Remove the grinding cone (Item 6).
    17. Remove the balls (Item 8).
    18. Remove the mounting (Item 7).
    19. Remove the springs (Item 9).
    20. Remove the carriers (Item10).
    21. Remove the felt ring (Item 11).

    1 Grinding cone fixing screw
    2 Intake worm gear
    3 Washer
    4 Adjustment ring
    5 Grinding ring
    6 Grinding cone
    7 Mounting
    8 Balls
    9 Springs
    10 Carriers
    11 Felt ring
    12 Grinder motor
    Figure 5-43: Grinder

    79



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    CVA610 Coffee System
    Technical Information

    5.40

    Grinder Unit - Assembly & Basic Setting
    Refer to Figure 5-43 on the previous page…
    Note
    The grinder ring (Item 6), and grinder cone, (Item 5), should only
    be exchanged together.
    1.
    2.
    3.
    4.
    5.
    6.

    Fit the felt ring (Item 11).
    Fit the carriers (Item 10).
    Fit the mounting (Item 7).
    Fit the springs (Item 9).
    Fit the balls (Item 8).
    Fit the grinding cone (item 6); ensure the balls are seated in the
    grinding cone.
    7. Fit the washer (Item 3).
    8. Fit the intake worm gear (Item 2), press it down, and turn it until
    the coupling engages.
    Note
    The grinding cone fixing screw (Item 1), has a left-hand thread.
    9. Tighten the grinding cone fixing screw, (Item 1), counter
    clockwise. Ensure the intake worm gear coupling has engaged
    properly.
    Note
    Before setting the grinder, remove all coffee from the grinder.
    10. Fit the bracket (Item 3).
    11. The blue marking on the carrier (Item 2), has the same position
    as the blue marking on the adjustment ring (item 1); both point
    toward the front of the appliance.
    12. Turn the adjustment ring clockwise as far as possible.
    13. Turn the adjustment ring counterclockwise by 6 settings so that
    the adjustment lever can be secured at a mid setting.
    14. Fit the adjustment lever such that the grinder is set to a medium
    grinding grade.
    15. Tighten the adjustment lever fixing screws.
    16. Push on the handle.

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  • Page 91

    CVA610 Coffee System
    Technical Information

    5.41

    Grinder Unit - Removal
    1. Open the door.
    2. Perform the Beans container removal (5.37).
    3. Remove the Waste Container, Brew Unit and Water Tank.
    4. Remove the Top Lid (5.1)
    5. Remove the Beans Container Guide (5.38).
    6. Adjustment slide switch frame removal (5.4).
    7. Remove the adjustment lever fixing screws.
    8. Remove the adjustment lever.
    9. Remove the cover fixing screws (Figure 5-44, Item 4).
    10. Remove the cover.
    Note
    Mark the polarity of the plug (Figure 5-44, Item 1), connected
    to the electronic unit.

    Figure 5-44: Accessing the grinder for complete removal

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    Technical Information

    11. Remove the plug from the Electronic.
    12. Lift the grinder upwards from the dampers (Figure 5-45, Item 2).

    1 Motor holder
    2 Damper
    3 Mounting plate
    Figure 5-45: Grinder coupling

    Note
    When refitting the grinder, the dampers should be seated in the
    mounting plate and motor holder to ensure the grinder coupling is
    set to an optimal position and grinder noise is kept to a minimum.

    82



  • Page 93

    CVA610 Coffee System
    Technical Information

    5.42

    Brew Unit Present Switch - removal
    1.
    2.
    3.
    4.

    Remove the Top Lid.
    Remove the Rear Panel.
    Disconnect the switch (Figure 5-46, Item 2).
    Press the retainers outward to remove the switch.

    Figure 5-46: Brew unit present switch location and removal.

    5.43

    Dispensing Solenoid - Removal
    1.
    2.
    3.
    4.
    5.

    Remove the Top Lid (5.1).
    Remove the Rear Panel (5.3).
    Remove the Beans Container (5.37).
    Remove the Beans Container Guide (5.38).
    Press the coil retainers outwards. Slide the coil upwards out of
    the guide.
    6. Disconnect the coil connections.

    5.44

    Dispenser Switch - Removal
    7.
    8.
    9.
    1.
    2.
    3.
    4.

    Remove the Top Lid (5.1).
    Remove the Rear Panel (5.3).
    Remove the Beans Container (5.37).
    Remove the Beans Container Guide (5.38).
    Remove the Dispensing Solenoid (5.34)
    Press the switch retainers outwards. Remove the switch.
    Disconnect the connections.

    83



  • Page 94

    CVA610 Coffee System
    Technical Information

    5.45

    Brew Unit Drives – Home Positioning
    1.
    2.
    3.
    4.
    5.

    5.46

    Remove the Brew Unit from the appliance.
    Re-install the Waste Unit.
    Close the door.
    Turn the selector switch to one of the operating settings.
    Allow the drives to reset into the home position.

    Waterpath / Flowmeter Check

    84



  • Page 95

    CVA610 Coffee System
    Technical Information

    5.47

    Water Path Leakage Test
    Should water be present in bottom of the appliance (i.e.
    Watersystem Fault); or a leak is suspected the following procedure
    can be used to locate the source of the leak.
    Caution
    The Heaters are hot during this test, and hot water under
    pressure could leak from the system.
    1.
    2.
    3.
    4.

    Fill the Water Tank
    Place the appliance into the Service Mode
    Quickly turn the selector knob to the “Programming” position
    Press and hold all three coffee buttons - check for signs of leakage
    (dripping, squirting etc...) hold buttons as long as necessary.
    5. Release the three coffee buttons to end the test

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    CVA610 Coffee System
    Technical Information

    If the steps 1-5 do not disclose any leaks - continue as follows.
    6. Fill the Water Tank
    7. Place the appliance into the Service Mode
    8. Quickly turn the selector knob to the “Operation” position
    9. Press and hold all three coffee buttons for 30 seconds
    10. Quickly turn the selector knob to the “Programming” position
    11. Press and hold all three coffee buttons - check for signs of leakage
    (dripping, squirting etc...)
    12. Release the three coffee buttons to end the test

    5.48

    Water Connections – Releasing
    Danger - Risk of burning or scalding!
    Components may be hot.
    Pressurized Steam could exist in the system.
    Before any service work is performed, allow time to cool.
    Refer to Figure 5-47 below
    1. Remove the retaining spring (Item 1).
    2. Pull out the hose from the connector.
    3. Remove the sealing rings (Item 2).

    1
    2
    3

    Retaining spring
    Sealing rings
    Pressed-on ring

    Figure 5-47: Water system connections with clip

    86



  • Page 97

    CVA610 Coffee System
    Technical Information

    5.49

    Water Connections - Fitting
    1.
    2.
    3.
    4.
    5.

    Check the Sealing Rings for damage - replace as necessary.
    Fit the Sealing Rings on the hose.
    Insert the Hose into the Connector.
    Fit the Retaining Spring behind the Pressed-On Ring.
    Ensure the Hose cannot be pulled from its Connector.

    Note
    The Pressed-On Rings cannot be replaced as a separate
    component. Should replacement be necessary the hose (as an
    assembly) must be replaced.

    87



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    Technical Information

    88



  • Page 99

    CVA610 Coffee System
    Technical Information

    6.

    Fault Diagnosis

    6.1

    Programming Mode
    The Programming Mode is available for access by the customer.
    The Programming Mode allows various options and / or features to
    configured.
    To access the Programming Mode, simply turn the selector knob to
    the “Program Mode” position

    Language
    Rinsing
    Water hardness
    Temperature long coffee
    Temperature coffee
    Temperature short
    (espresso) coffee
    Pre-brewing
    Pre-grinding
    Program hot water
    Total coffee
    Descaling
    Standby timer

    German, Dutch, Portuguese, Spanish, English,
    Italian or French
    on, off
    hardness levels 1 to 4
    minimum, low, medium, high, maximum
    minimum, low, medium, high, maximum
    minimum, low, medium, high, maximum
    on, off,
    off, on
    off, on
    number of coffee servings
    automatic descaling program
    to put unit in, selectable in 15 minute periods

    Table 5-1: Programming Mode

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    CVA610 Coffee System
    Technical Information

    6.2

    Service Mode
    The Service Mode is used to check the status of various input
    switches and operate components in the appliance. The Service
    Mode is designed for accessed by qualified service personnel only.
    Initial requirements
    • Switch off the appliance
    • Ensure the front door is closed
    Access
    1. Press and hold the SMALL COFFEE button and the HOT
    WATER button.
    2. Refer to the Service Mode chart on the following page… turn
    the selector knob to the desired position.
    3. Release the SMALL COFFEE and HOT WATER buttons.
    4. Press the applicable button to activate the function listed.
    Acknowledgement Indicator
    The following is an example indicates the appliance is in the
    Service Mode…
    Electronic
    Version

    The display indicates the switches currently actuated.
    1. Brewing position switch (brew unit drives)
    2. Home position switch (brew unit drives)
    3. Dispenser switch
    4. Steam valve switch
    5. Waste container present switch
    6. Brew unit present switch
    7. Water tank level switch
    8. Flow meter pulse (not always displayed)
    A. Drip tray filled (water system fault)

    90



  • Page 101

    CVA610 Coffee System
    Technical Information

    Service Mode - Navigation
    Displays Water Temperature for Water
    Heater and Steam Heater in Celsius.
    Displays firmware version
    (not used)
    (not used)
    (not used)
    Water Pump ON
    Steam Solenoid ON
    Hot Water Valve ON
    Displays 5
    Displays 4
    Button Test “1” displayed
    Button Test “2” displayed
    Button Test “3” displayed
    Button Test “5” displayed
    Button Test “4” displayed
    Drive motor ON till Brew Position
    Switch is contacted
    Drive motor ON (reverse direction) till
    Home Switch is contacted
    Grinder ON
    (not used)
    Dispenser Solenoid ON
    Hot Water / Coffee Side Heater
    Element ON
    Hot Water / Coffee Upper Heater
    Element ON
    Steam Heater Element ON
    Front Lights (CVA615)
    (not used)

    Large Coffee
    LOCK

    PROGRAM
    MODE

    LIGHT

    Med Coffee
    Small Coffee
    Hot Water
    Rinse
    Large Coffee
    Med Coffee
    Small Coffee
    Hot Water
    Rinse
    Large Coffee
    Med Coffee
    Small Coffee
    Hot Water
    Rinse
    Large Coffee

    ON W/
    LIGHT

    Med Coffee
    Small Coffee
    Hot Water
    Rinse
    Large Coffee

    ON

    Med Coffee
    Small Coffee
    Hot Water
    Rinse

    Table 5-2: Service Mode

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  • Page 102

    CVA610 Coffee System
    Technical Information

    6.3

    Displayed Messages
    Displayed Message

    Information
    The brew unit is dirty.
    The brew unit is blocked.
    The brew unit is Jammed.

    BREW UNIT BLOCKED



    Clean / inspect brew unit / check drives
    Air is present with the water system –

    EXPEL AIR



    Perform “Expel Air” procedure.
    The beans container is empty OR
    The grinder may be jammed.



    FILL COFFEE BEANS



    Add coffee beans to the beans
    container.
    Clean the conical grinder (top of
    grinder)

    Brew unit is not installed OR
    Not installed correctly.

    BREW UNIT MISSING




    Reinstall the brew unit
    Check brew unit present switch

    DESCALING



    Perform the Descale Procedure.

    Waste unit is not installed OR the
    waste unit is not installed correctly

    WASTE UNIT MISSING





    Re-install the waste unit
    Check magnet on rear of waste unit
    Check brew unit present switch

    Table 5-3: Displayed messages (continued on table 5-4)

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    CVA610 Coffee System
    Technical Information

    Displayed Message

    Information
    The appliance is in the energy saving

    STANDBY…



    Press ENTER
    The level switch has been actuated by
    water being present in the base of
    the appliance

    WATER SYSTEM FAULT



    Clear unit of water from lower pan and
    locate / repair source of leak.
    • Check level switch for proper operation
    The water tank level switch is not actuated
    – water tank float is below the switch level




    FILL WATER TANK

    Refill the water tank
    Check that float and switch operate



    Check that flowmeter is plugged into
    the correct position of the electronic
    Appliance is warming up, as warming up
    the “. . .” in the display disappear

    EMPTY WATERTANK
    WARMING UP…

    Table 5-4: Displayed messages (continued from table 5-3)

    93



  • Page 104

    CVA610 Coffee System
    Technical Information

    6.4

    Uneven Filling - When two cups of coffee/espresso
    are being prepared at the same time
    1. Ensure the appliance is level – correct as necessary.
    2. Clean the coffee nozzle.

    6.5

    Brew Unit – Can’t be removed from appliance
    The brew unit is not in the starting (home) position.
    Reset the brew unit to the starting (home) position via the
    service mode.
    The brew unit is jammed and cannot be removed by resetting the
    appliance (i.e. shutting the door and turning on the power).
    1. Perform the manual removal procedure.
    2. Inspect the brew unit and/or drives to locate fault.

    6.6

    Brew Unit – Can’t be installed
    Ensure the handle section marked “PRESS” is pressed during
    installation of the Brew Unit. This area is only pressed during
    removal of the Brew Unit.
    The brew unit is not in the starting (home position).
    Perform the “Brew Unit — manual resetting procedure (5.29).
    The Drive Shaft is not in the starting (home) position.
    1. Reset the brew unit to the starting (home) position via the
    service mode.
    2. Inspect the Brew Unit and/or drives to locate fault (i.e. defective
    switch etc...)

    94



  • Page 105

    CVA610 Coffee System
    Technical Information

    6.7

    Grinding Setting – Can’t be set to a finer position
    (adjustment lever blocked)
    Check for ground coffee between the grinding ring and grinding
    cone. The ground coffee may have clogged the gap between the
    ring and cone.
    1. Set the adjustment lever to the finest setting possible.
    2. Prepare a coffee.
    3. Set the adjustment lever to a finer setting.
    Advise the customer the grinder should only be adjusted in small
    increments

    95



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    Technical Information

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