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Miele CVA 4062 Technical Information

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TECHNICAL INFORMATION
CVA 406x Coffee Systems
© 2012 Miele USA

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  Summary of Contents for Miele CVA 4062

  • Page 1 TECHNICAL INFORMATION CVA 406x Coffee Systems © 2012 Miele USA...
  • Page 2: Table Of Contents

    1  Front View ......................14  2  Interior View ......................15  3  Electrical Components ..................16  3.1   CVA 4062, CVA 4068 ................... 16   3.2   CVA 4066 ..................... 17   010  Housing ......................18  4  Service ........................ 19  4.1  ...
  • Page 3 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 4.2   Dispenser Present Switch (S87/6) Removal ..........33   4.3   Dispensing Area Light (1H3, 2H3) Removal ..........33   4.4   Door Removal ....................33   030  Drive, Brew Unit ....................35 ...
  • Page 4 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 2  Function ....................... 74  2.1   Water Tank ....................74   2.2   Filling the Water Tank ................... 74   2.2.1 Manually Filling the Water Tank .............. 74     2.2.2 Automatically Filling the Water Tank (CVA 4066 Models Only) ....75  ...
  • Page 5 1   Some CVAs May Experience a Power Electronic TRIAC Failure ..... 105  2   The Display Clock on Models CVA 4062 and CVA 4066 May Change Time Unexpectedly ..................... 106  3   CVA & French Roast Coffee ................106 ...
  • Page 6 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 030-10: Drain Position, Front View ..............40 Figure 030-11: Service Door Screws ................41 Figure 030-12: Service Door Open ................. 42 Figure 030-13: Brew Unit Removal ................. 42 Figure 030-14: Brew Unit Drive Retaining Screws ............43 Figure 040-1: Grinder Adjustment ...................
  • Page 7 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 070-3: Power Electronic Retaining Screws ............100 Figure 080-1: Brass Elbow Location ................103 Figure 080-2: Service Door Retaining Screws .............. 103 Figure 080-3: Water Inlet Valves ................... 104 List of Tables Table C-1: Technical Data ....................
  • Page 8: Warning And Safety Instructions

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Warning and Safety Instructions General Any repairs or maintenance performed by unqualified personnel could be dangerous. All applicable laws, codes, regulations, and accident prevention guidelines must be observed when serving, modifying, testing or maintaining appliances. All repairs should be performed by a trained technician in strict accordance with local, state and national codes.
  • Page 9: Touch Current Measurement

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Touch Current Measurement Touch current measurement should be carried out on all accessible conductive parts that are not connected to ground. Warning! Touch current measurement may only be performed after the ground...
  • Page 10: Before The First Use

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Before the First Use The appliance must be correctly installed and connected before first use. Carefully read all instructions on use and care of the CVA in the operating manual. Remove all containers from the CVA and clean them. Refer to the operating manual.
  • Page 11: Technical Data

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Technical Data Model CVA 4062 CVA 4066 CVA 4068 Type Free-standing Built-in Tall unit Wall unit Dresser unit Door hinge Left Left Left Dimensions Appliance dimensions Height 17.6” 17.6” 17.6” Width 22.0”...
  • Page 12 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Model CVA 4062 CVA 4066 CVA 4068 Weight Net weight (stainless-steel version) 62.0 lbs 62.0 lbs 62.0 lbs Estimated additional/less weight for: Aluminum version -0.8 lbs -0.8 lbs Glass version (Porsche/Poggenpohl +0.7 lbs...
  • Page 13: Table C-1: Technical Data

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Model CVA 4062 CVA 4066 CVA 4068 Accessories supplied Test strips for measuring water hardness Tube of silicone O-ring Advice sheet - Coffee residue Wiring diagram Allen keys for niche See Section 070-4.1 and Table 070-3.
  • Page 14: D Component Layouts

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Component Layouts Front View Figure D-1: Front View of Appliance 1 On/Off touchpad 7 Door grip 2 Display 8 Hot-water dispenser 3 Left arrow, <, to scroll through program options 9 Lighting...
  • Page 15: Interior View

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Interior View Figure D-2: Interior View of Appliance 1 Main switch 7 Water tank 2 Storage drawer 8 Brew unit 3 Ground-coffee chute 9 Waste container 4 Grind adjustment lever 10 Main dispenser connector (connects the...
  • Page 16: Electrical Components

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Electrical Components CVA 4062, CVA 4068 Figure D-3: CVA 4062, CVA 4068 Component Layout Switch, ground coffee funnel 18 Monitoring switch, grounds container Power electronic (EPL) 19 Flow meter Bean container sensor...
  • Page 17: Cva 4066

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information CVA 4066 Figure D-4: CVA 4066 Component Layout Switch, ground coffee funnel 19 Hot-water solenoid Power electronic (EPL) 20 Monitoring switch, grounds container Bean container sensor 21 Flow meter Grinder with temperature limiter...
  • Page 18: Housing

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Housing...
  • Page 19: Service

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Removing the Appliance from a Cabinet 1. Turn off the water supply (CVA 4066). 2. Disconnect the appliance from power. 3. Open the door. 4. Remove the containers and drip tray.
  • Page 20: Installation

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Installation Note: ▪ Make sure that the cabinet or the walls are stable enough to support the appliance. ▪ The CVA is designed to be built into cabinets and must be fully installed before any operation is preformed.
  • Page 21: Figure 010-3: Cva Feet Adjustment

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 3. The on-site water line must have a water valve to turn water off when needed. If not present, have a water valve installed by a licensed plumber. 4. If necessary, unscrew the height-adjustable feet (Figure 010-3) on the underside of the machine by about ⁄...
  • Page 22: Adjusting The Door Hinges

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 4.2.2 Adjusting the Door Hinges The door hinges can be adjusted if the door cannot be opened easily. To adjust the door sideways, turn the screw as shown in Figure 010-5, Item 1. To adjust the door forwards or backwards, turn the screw as shown in Figure 010-5, Item 2.
  • Page 23: Exterior Side Panels

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Exterior Side Panels...
  • Page 24: Door Inner Panel

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Door Inner Panel...
  • Page 25: Coffee/Hot-Water Dispenser

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Coffee/Hot-Water Dispenser...
  • Page 26: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Adjusting the Dispenser Height To prevent the coffee or espresso from cooling prematurely, and to achieve a better crema, the coffee dispenser can be adjusted to minimize the distance to the cup.
  • Page 27 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Remedy: Since machine no. 81467600, an improved dispenser (mat. no. 07353230) has been installed. Replace the defective dispenser with this new dispenser, if necessary. Cause: The rubber stoppers have become loose and gotten stuck in the machine when the dispenser is removed.
  • Page 28: Door Outer Panel, Control/Display Electronic

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Door Outer Panel, Control/Display Electronic...
  • Page 29: Function

    The appliance has an optical interface for diagnostic support or program updating; see Figure 025-1, Item 1. Its location can be found by using the optical interface search function of the Miele Diagnostic Support unit (MDU). Figure 025-1: Optical Interface for Diagnostic Support and Program Updating Control/Display Electronic EPWZ (N5) The control/display electronic is located in the door (Figure D-3 or D-4, Item 8).
  • Page 30: Remotevision Infocontrol: Incorrect Language Set

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information To deactivate the optical interface again, depending on the selected remedy: 1. Quit the machine service mode, or 2. Briefly disconnect the machine from the power supply again, or 3. Log on the machine to the RemoteVision system.
  • Page 31: Figure 025-2: Right And Central Covers

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 6. Remove the right cover. 7. Remove the five central cover retaining screws (T10); see Figure 025-2, Item 2. 8. Remove the central cover. Figure 025-2: Right and Central Covers 9. Disconnect the three milk and coffee hoses; see Figure 025-3, Item B.
  • Page 32: Figure 025-4: Main Dispenser Retaining Screws

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 15. Remove the main dispenser. Figure 025-4: Main Dispenser Retaining Screws 16. Remove the three control/display electronic cover retaining screws (Figure 025-5, Item 1). 17. Disconnect the power electronic connection (Figure 025-5, Item 2).
  • Page 33: Dispenser Present Switch (S87/6) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 025-6: Control/Display Electronic Connections 1 Control panel (A1) connection 2, 3 Power electronic (2N1) connections Dispenser Present Switch (S87/6) Removal 1. Remove the side cover. 2. Remove the central cover. 3. Squeeze the tabs of the microswitch housing inwards.
  • Page 34: Figure 025-7: Door Hinge Screws

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 025-7: Door Hinge Screws Note: The Teflon hoses are different colors to prevent crossing the lines during reassembly. Warning! In order to avoid possible water system faults (e.g., clogging or blocking of valves), grease, oil or other slip lubricants should never be used when assembling and installing water system parts.
  • Page 35: Drive, Brew Unit

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Drive, Brew Unit...
  • Page 36: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Brew Unit Control Coffee is dispensed into the hopper of the brew unit by the grinder operation. The brew unit drive motor is energized and the brew unit drives toward the “brew” position;...
  • Page 37: Figure 030-2: Brew Unit Switching Cam, Ground Quantity Compensation Microswitch

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information to 7, which cover grinding times of 5.5 to 9.5 seconds (± 1.6 seconds ground quantity compensation). To prevent the brewing mechanism from overfilling, the maximum grinding time is limited to 10 seconds.
  • Page 38: Brew Unit Drive, Home Position

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 030-4: Selectable Volume Areas 1, 2 and 3 If the measure quantity varies from the set quantity, then the grinding time will be increased or decreased by approximately 0.2 seconds as appropriate during the next grinding cycle.
  • Page 39: Brew Unit Drive, Compressing Position (Brew Position)

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 2.1.4 Brew Unit Drive, Compressing Position (Brew Position) The drive moves until the second cam of the double-cam element switches the bottom microswitch, and the top microswitch is no longer switched (Figure 030-7). The pawl presses down on the spring (Figure 030-8) and closes the drain valve.
  • Page 40: Fault Repair

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 030-9: Drain Position, Rear View Figure 030-10: Drain Position, Front View Fault Repair Coffee Grounds Next to the Brew Unit Symptom: After approximately 5 coffee servings, there is a large amount of coffee grounds next to the brew unit.
  • Page 41: Service

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Remedy: Note: Since machine no. 81480718, a new brew unit (mat. no. 06725806) has been incorporated. 1. Replace the brew unit. 2. So that the grinding amount compensation can be re-adjusted, restore all settings to their factory defaults;...
  • Page 42: Figure 030-12: Service Door Open

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Grind amount compensation microswitch 2 Brew unit drive Figure 030-12: Service Door Open 7. Disconnect the brew unit drive electrical connection (red and black wires). 8. Disconnect plug ST4 from the power electronic.
  • Page 43: Removing The Grind Amount Compensation Microswitch (S51/4)

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 13. Remove the white cam. 14. Remove the brew unit drive. Figure 030-14: Brew Unit Drive Retaining Screws Note: When re-installing the brew unit drive, ensure that the white cam is in the home position.
  • Page 44 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 6. Open the service door. See Figure 030-12. 7. Unsnap the cover containing the microswitches and the double-cam element. 8. Disconnect the appropriate microswitch's wiring harness. 9. Release the microswitch from its retaining tabs to remove.
  • Page 45: Grinder

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Grinder...
  • Page 46: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Adjusting the Grinder Setting Push the slide control to the left for a finer grind or to the right for a coarser grind. See Figure 040-1. You should be able to feel the adjustment settings when moving the slide control.
  • Page 47: Figure 040-3: Service Door Screws

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 040-3: Service Door Screws 5. Release the wiring harness (black cable) connecting the control and power electronics from its guide. 6. Open the service door. See Figure 040-4. Figure 040-4: Service Door Open 7.
  • Page 48: Figure 040-5: Bean Container Guide Retaining Screws

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 040-5: Bean Container Guide Retaining Screws 10. Pull off the adjustment lever handle; see Figure 040-6. Figure 040-6: Adjustment Lever Handle 11. Remove the bean container guide and disconnect the wiring harness.
  • Page 49: Figure 040-7: Grinder Retaining Screws

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 14. Remove the T10 screw securing the ground coffee chute to the grinder (Figure 040-7, Item A) and remove the chute. Figure 040-7: Grinder Retaining Screws 15. Remove the grinder halfway. 16. Disconnect all electrical connections to the grinder.
  • Page 50: Flow-Thru Heaters

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Flow-Thru Heaters...
  • Page 51: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Steam System The appliance has two heating systems. This allows for independent preparation of froth/cappuccino or espresso/coffee. The second heating system can be turned off to save energy during the heating phase, e.g., if froth is not prepared very often. When the steam system is turned off and froth or cappuccino is selected, the appliance must heat up first to produce steam.
  • Page 52: Figure 050-2: Service Door Open, Showing Heaters

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Steam heater 2 Coffee/hot water heater Figure 050-2: Service Door Open, Showing Heaters 7. Remove the 2 bottom rear panel retaining screws (T10). 8. Remove the bottom rear panel. 9. Remove the two spring clips from the coffee/hot-water heater water line connections (arrows, Figure 050-3).
  • Page 53: Removing The Temperature Limiter, Fuse, Temperature Sensor From The Coffee/Hot-Water Heater

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Temperature limiter 2 Fuse 3 Temperature sensor Figure 050-4: Temperature-Regulating Components on Coffee/Hot Water Heater Warning! In order to avoid possible water system faults (e.g., clogging or blocking of valves), grease, oil or other slip lubricants should never be used when assembling and installing water system parts.
  • Page 54: Removing The Steam Heater (1R1)

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Removing the Steam Heater (1R1) 1. Remove the appliance from its cabinet. See Section 010-4.1. 2. Carefully remove the top cover retaining screws. The larger (T20) screws have metal washers underneath that can easily be misplaced.
  • Page 55: Figure 050-8: Steam Heater And Bracket

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 8. Remove the four heater bracket retaining screws (T10); see Figure 050-8, Item 1. 9. Remove the heater/bracket assembly. Figure 050-8: Steam Heater and Bracket 10. Unscrew the temperature sensor, temperature limiter and fuse from the heater; see Figure 050-9, Items 1, 2 and 3.
  • Page 56: Removing The Temperature Limiter, Temperature Sensor, Fuse From The Steam Heater

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Removing the Temperature Limiter, Temperature Sensor, Fuse from the Steam Heater 1. Remove the steam heater; see Section 050-4.3. 1 Temperature limiter 2 Temperature sensor 3 Fuse Figure 050-10: Temperature-Regulating Components on Steam Heater 2.
  • Page 57: Pumps, Solenoids, Flow Meters

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Pumps, Solenoids, Flow Meters...
  • Page 58: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Water Paths 2.1.1 Overview Figure 051-1: CVA Water Path - Overview Steam heater Coffee/hot-water heater Steam pump Ceramic valve Water tank Pressure relief valve Flow meter Drain valve Coffee/hot-water pump Decompression vessel...
  • Page 59: Water Path - Coffee

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 2.1.2 Water Path – Coffee The highlighted path in Figure 051-2 details the flow of water in the coffee- and espresso-making process. Water flows from the water tank (3), through the flow meter (4), and into the coffee/hot-water pump (5), where it is pumped out through the coffee/hot-water heater (10).
  • Page 60: Water Path - Hot Milk

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 051-3: Hot-Water Path 3 Water tank 9 Hot-water solenoid 4 Flow meter 10 Coffee/hot-water heater 5 Coffee/hot-water pump 17 Drip tray 2.1.4 Water Path – Hot Milk The highlighted path in Figure 051-4 details the flow of steam and milk in the hot-milk process.
  • Page 61: Water Path - Milk Froth

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 2.1.5 Water Path – Milk Froth The highlighted path in Figure 051-5 details the flow of steam and milk for milk froth production for cappuccino or latte macchiato (or solely milk froth). When one of these beverages is selected, the steam pump (2) will draw water from the water tank (3).
  • Page 62: Service

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Hot-Water Solenoid (Y61) Removal 1. Remove the appliance from its cabinet. See Section 010-4.1. 2. Remove the two screws securing the support plate (one T10 and one T20); see Figure 051-6, Item 1.
  • Page 63: Figure 051-7: Rinsing And Hot-Water Solenoids

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Rinsing solenoid 2 Hot-water solenoid Figure 051-7: Rinsing and Hot-Water Solenoids 4. Remove the two spring clips from the hot-water solenoid water connections; see arrows, Figure 051-8. 5. Remove the solenoid.
  • Page 64: Rinsing Solenoid (Y62) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Rinsing Solenoid (Y62) Removal 1. Remove the appliance from its cabinet. See Section 010-4.1. 2. Remove the two screws securing the support plate (one T10 and one T20); see Figure 051-9, Item 1.
  • Page 65: Figure 051-10: Rinsing And Hot-Water Solenoids

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Rinsing solenoid 2 Hot-water solenoid Figure 051-10: Rinsing and Hot-Water Solenoids 4. Remove the three spring clips from the rinsing solenoid water connections; see Figure 051-11. 5. Remove the solenoid. 6. Disconnect all solenoid electrical connections.
  • Page 66: Coffee/Hot Water Pump (2M7) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Coffee/Hot Water Pump (2M7) Removal 1. Remove the appliance from its cabinet. See Section 010-4.1. 2. Carefully remove the top cover retaining screws. The larger (T20) screws have metal washers underneath that can easily be misplaced.
  • Page 67: Figure 051-14: Coffee/Hot Water And Steam Pumps

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 9. The coffee/hot-water pump is shown in Figure 051-14, Item 1. 1 Coffee/hot-water pump 2 Steam pump Figure 051-14: Coffee/Hot Water and Steam Pumps 10. Remove the spring clip from the Teflon hose connection on the pressure relief valve and disconnect the Teflon hose;...
  • Page 68: Steam Pump (1M7) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Pressure relief valve 2 Pump retaining screws 3 Temperature limiter Figure 051-15: Coffee/Hot Water Pump Warning! In order to avoid possible water system faults (e.g., clogging or blocking of valves), grease, oil or other slip lubricants should never be used when assembling and installing water system parts.
  • Page 69: Flow Meter (B3/4) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1 Pump retaining screws 2 Temperature limiter Figure 051-16: Steam Pump Warning! In order to avoid possible water system faults (e.g., clogging or blocking of valves), grease, oil or other slip lubricants should never be used when assembling and installing water system parts.
  • Page 70: Figure 051-17: Flow Meter

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 051-17: Flow Meter 9. Disconnect the silicone hoses from the flow meter; see Figure 051-18. 10. Disconnect the flow meter wiring harness. 11. Remove the flow meter from its plastic support. See Figure 051-18, Item 2.
  • Page 71: Decompression Vessel Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Decompression Vessel Removal 1. Remove the appliance from its cabinet. See Section 010-4.1. 2. Open the front door of the appliance and take out the waste container. 3. Carefully remove the top cover retaining screws. The larger (T20) screws have metal washers underneath that can easily be misplaced.
  • Page 72: Figure 051-20: Ceramic Valve, Removed From Machine

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 7. Open the service door. See Figure 051-13. 8. If necessary, remove the bottom rear panel retaining screws and bottom rear panel. 9. Pull off the drain tube from the decompression vessel. See Figure 051-19, Item 1.
  • Page 73: Containers, Drip Tray, Accessories

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Containers, Drip Tray, Accessories...
  • Page 74: Technical Information 2 Function

    There are two magnetic floats in the water tank to monitor water levels (versus only one float in the CVA 4062's water tank). An anti-splash tube is attached to the lid of the water tank to prevent splashing of water while filling.
  • Page 75: Automatically Filling The Water Tank (Cva 4066 Models Only)

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Note: The water tank must be positioned correctly or the valve will leak. If the water tank has not clicked into place, pull the tank out, then check and clean the niche.
  • Page 76: Fault Repair

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Fault Repair Milk Container Not Registered as Empty Cause: Moisture in the handle. This moisture causes a short circuit to the housing, and thus prevents sensing. Remedy: Rinse off the handle, shake it out and let it dry.
  • Page 77: Cleaning The Stainless-Steel Milk Container

    “max” mark, add the cleaning agent, and press OK. Lukewarm water must be used to dissolve the cleaning agent properly. It is important to use the supplied Miele cleaning agent as it has been developed specifically for this machine.
  • Page 78: Electronic Modules

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Electronic Modules...
  • Page 79: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Machine Response after Power Supply Interruption After a power failure, the machine remains switched off (standby). The fault memory and all modifications made by the operator are saved. Software IDs Production Index ID No.
  • Page 80: F3 -- Steam Ntc (1R30) Short-Circuited

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Note: The approximate resistance values of this NTC are 100kΩ at 77°F (25°C), 5.5kΩ at 212°F (100°C), and 1kΩ at 320°F (160°C). 4. Check the resistance of the temperature sensor at different temperatures and compare to the above values.
  • Page 81: F10 -- No Water Intake

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information F10 -- No Water Intake Cause: Water container inserted incorrectly. Remedy: Insert the water container correctly. Cause: Hose connections interrupted, blocked or kinked. Remedy: 1. Check hose connections. 2. Replace hoses, if necessary.
  • Page 82: F28 -- Too Much Ground Coffee In Brew Unit

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Cause: Hose connections interrupted, blocked or kinked. Remedy: 1. Check hose connections. 2. Replace hoses, if necessary. Cause: Water container valve jammed or clogged. Remedy: 1. Check water container valve. 2. Replace water container, if necessary.
  • Page 83: F41 -- Eeprom Faulty/Data Fault

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information F41 -- EEPROM Faulty/Data Fault Cause: EEPROM faulty/data fault. Remedy: 1. See Control/Display Electronic EPWZ (N5) Removal, Section 025-4.1. 2. Install a new control/display electronic. F42 -- Line Frequency Not Registered Cause: Frequency fluctuations or power-supply interference.
  • Page 84: F74 -- Ceramic Valve Fault

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 070-2: Brew Unit Guide 4. In service mode, without the brew unit, initialize the brew unit drive; see Table 070-5 in Section 070-4.3. 5. If initialization is not possible, replace the brew unit drive. See Brew Unit Drive (M26) Removal, Section 030-4.1.
  • Page 85: F76 -- Fault During Pressing In Brew Unit

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 3.13 F76 -- Fault during Pressing in Brew Unit Cause: The brew unit guide is inserted incorrectly. Remedy: Re-insert the guide correctly (Figure 070-2, Item 1). Cause: Grind amount too high. Remedy: Reduce the grind amount;...
  • Page 86: F82 -- Coffee/Hot Water Heater (2R1) Overheating

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Remedy: Replace the fuse. Note: In order for the customer to be able to continue to prepare coffee and obtain hot water in the period before the service technician arrives, he or she can switch off the steam system.
  • Page 87: Replace Drip Tray" Message, Even Though Drip Tray Is Inserted

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Cause: During water intake the water container has been emptied. The top float in the water container has not switched within 5 minutes. Remedy: Confirm the fault message with OK. 3.20 "Replace Drip Tray" Message, Even Though Drip Tray Is Inserted Cause: The inserted drip tray or drip tray overflow is occasionally not detected.
  • Page 88: X Servings Until Descaling" Shown In Display

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 3.22 "X Servings until Descaling" Shown in Display Cause: The maximum permitted flow of coffee/hot water or the maximum time for steam dispensing has been reached. The values monitored for this depend on the set water hardness.
  • Page 89: Descaling Is Interrupted

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 3.24 Descaling Is Interrupted Symptom: The machine stalls 1 minute before the end of descaling. Cause: Defective triac on the power electronic. Remedy: Modified power electronic after machine no. 81477137. Power electronic EPL 865, mat.
  • Page 90 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Save and quit: 1. To save and quit, press OK. 2. To quit without saving any changes, press On/Off. Note: If the language is not set correctly, use the icon as a guide to get to the language setting.
  • Page 91 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Programming Option Description Function Switch on at The machine is switched on at the specified time. (e.g., 7:30) Switch off after (e.g., The appliance will be switched off after Timer 0:15 for 15 minutes) the specified interval has elapsed.
  • Page 92 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Programming Option Description Function Minimum Minimum = 205°F at flow-through Latte Macchiato Medium heater. High Low = 208°F at flow-through heater. Maximum Medium = 212°F at flow-through Temperature heater. Minimum High = 215°F at flow-through heater.
  • Page 93: Service Programming Mode

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Programming Option Description Function System lock is switched on. The machine can be safeguarded against Safety accidental switch-on. System lock is switched off. Soft 1 (0 - 4 grains per gallon) Set the water hardness. The water...
  • Page 94: Table 070-4: Service Programming Settings

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Acknowledgement indicator: Programming is shown in the display, along with the service programming options. Options: 1. Touch < or > to scroll to the desired programming function (see Table 070-4). Press OK to select the function.
  • Page 95: Service Mode

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Mode Initial requirements: Switch the appliance off. Accessing: 1. Press and hold Hot Water. 2. Press On/Off once. 3. Release Hot Water. 4. Press Hot Water again 3 times; hold on the 3rd time until the service mode is displayed.
  • Page 96 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Function Option Description The brew unit is moved through its positions and then back to the Initialize home position. To prevent mechanical damage, always initialize as a last step. Home position...
  • Page 97 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Function Option Description The steam pump runs. 1M7 (Steam Pump) The steam pump is switched off. The coffee/hot water pump runs. The number of pulses from the flow meter will display. If this value is approximately 33, then the water flow is sufficient.
  • Page 98 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Function Option Description 1: The water supply valves are switched on. 1Y63+2Y63 (Water Supply Valves) 0: The water supply valves are switched off. Empty the water container or remove it from the appliance.
  • Page 99: Table 070-5: Service Mode

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Service Function Option Description The grind amount compensation S51/4 (Grind Amount switch is open. Compensation The grind amount compensation Microswitch) switch is closed. S60/1, S60/2 (Brew Move the brew unit into the appropriate position using the...
  • Page 100: Power Electronic Epl (N4) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Display Reading Description Brew Unit Brew Unit Position S60/1 S60/2 Position Brew Unit Position Switch, Bottom Switch, Top Closed Open Home position Open Closed Compressing position Closed Closed Drain position Open Open...
  • Page 101: Water Intake (Cva 4066 Only)

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Water Intake (CVA 4066 Only)
  • Page 102: Function

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Function Plumbed Water Line (CVA 4066 Only) The CVA 4066 model is designed for operation with a permanent cold tap water connection, but can be converted from water line to water tank use by programming the plumbed water line connection to On or Off.
  • Page 103: Water Inlet Valve (1Y63, 2Y63) Removal

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 080-1: Brass Elbow Location 3. Pull out the inlet filter (behind the brass elbow) using needlenose pliers. 4. Check and clean the inlet filter with hot water and a brush. Water Inlet Valve (1Y63, 2Y63) Removal 1.
  • Page 104: Figure 080-3: Water Inlet Valves

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 8. Disconnect the water inlet valve electrical connections (four wires); mark/label these wires. The valve on the right is the primary valve; valve on the left, the secondary valve. See Figure 080-3, Item 1.
  • Page 105: Technical Service Bulletins

    Some machines will display no obvious symptoms. Models affected: CVA 4062, CVA 4066, CVA 2652, CVA 2662. If a CVA 2650 or CVA 2660 was upgraded with a heater conversion kit, this behavior may be seen on these models.
  • Page 106: The Display Clock On Models Cva 4062 And Cva 4066 May Change Time Unexpectedly

    On some CVA coffee systems, the display clock may change suddenly back to 12:00 without any warning or user intervention. This applies specifically to the CVA 4062 and CVA 4066 models. Other functions of the coffee system are not affected.
  • Page 107: Cva Water Tank Cleaning

    30-60 days. There is no fault with the equipment and no reason to replace the tank. CVA 4062 & CVA 4066 Milk Pipework Conversion The factory has designed a new milk pipework scheme for these coffee systems. The purpose of this conversion is to make the pipework more easily accessible to the customer for cleaning.
  • Page 108 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information 1. Open the door. 2. Remove the milk container. 3. Remove the 3 screws securing the right cover (Figure 1, Item 1). 4. Remove the cover. 5. Remove the 5 screws securing the central cover (Figure 1, Item 2).
  • Page 109 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 2 15. Remove the front stainless-steel fascia piece from the central spout. 16. Remove the central spout from the front. 17. Slide the height adjustment mechanism upwards. 18. Remove the 2 retaining spring clips (Figure 3, Item 1).
  • Page 110 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 3 21. Remove the 4 screws securing the holder (Figure 4, Item 1). 22. Disconnect the connection to the left light (Figure 4, Item 2). Figure 4 23. Remove the holder, as well as the complete height adjustment mechanism (Figure...
  • Page 111 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 5 24. Remove the 2 screws securing the central spout connection (Figure 6, Item 1). 25. Remove the central spout connection. Figure 6 26. Install the new central spout connection (Figure 7) in position and carefully tighten...
  • Page 112 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 7 27. Install the connection holder, taking care to ensure that no connections are trapped, and re-install the 4 retaining screws (Figure 4, Item 1). 28. Reconnect the connection to the left light (Figure 4, Item 2).
  • Page 113 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Figure 9 32. Re-install the microswitch with its housing and clip it in place (Figure 3, Item 2). 33. Re-install all connections in their guides. 34. To ensure that the new cover can be secured, the screw boss (Figure 10, Item 1) must be shortened by exactly 15 mm using diagonal cutters or an appropriate tool.
  • Page 114: Cva Door Hose Replacement

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information appropriate tool to cut out a corner approximately 12 mm x 12 mm from the height adjustment mechanism (see Figure 11, Item 1). Figure 11 36. Install the coupling piece in the new cover and re-install the retaining screw (Figure 1, Item 3).
  • Page 115: Cva Replacement Coffee Grinders

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information CVA Replacement Coffee Grinders Should the need arise to replace a grinder assembly in any whole-bean CVA system, be advised that you (or the servicer) may find some coffee residue in the new grinder.
  • Page 116: Understanding Cva 40Xx Temperature Fuses

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information Setting Ranges Factory Setting Espresso 30 – 250 mL 60mL Coffee 30 – 250 mL 125mL Espresso 30 – 250 mL 60mL Cappuccino Milk froth 1 – 60 s 15 s Espresso 30 –...
  • Page 117: Cva 406X & Mdu Updates

    CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information temperature (steam = 160°C; coffee = 116°C). As a final layer of protection, the temperature fuses are calibrated to open at 216°C. Once this fuse opens, the heater will no longer operate.
  • Page 118 CVA 4062/CVA 4066/CVA 4068 Coffee Systems Technical Information...

This manual is also suitable for:

Cva 4066Cva 4068