Miele CVA615 manual Refer to -18– Brew Unit Drive Assembly

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Refer to Figure 4-18 – Brew Unit Drive Assembly.

CVA615 Coffee System

Technical Information

Refer to Figure 4-18 – Brew Unit Drive Assembly.

The drive motor (Item 1) is powered by the electronic and turns both the worm gear (Item 3) and the single-stage step-down gear (Item 4). The drive shaft cog gear (Item 5) has two switch actuators for the brew position switch (Item 6) and the home position switch (Item 7). Both switches are monitored by the electronic to determine the position of the brew unit.

1Drive Motor

2Brew Unit Present Switch

3Worm Gear

4Step Down Gear

5Drive Shaft Cog Gear

6Brew Position Switch

7Home (Start) Position Switch

Figure 4-18:Brew Unit Drive Assembly

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Contents TECHNICAL INFORMATION CVA615 Coffee System 2007 Miele USACVA615 Coffee System – Table of Contents Service and Maintenance Fault Diagnosis CVA615 Coffee System – List of Figures CVA615 Coffee System – List of Figures continued Figure 5-43:Beans Container Guide CVA615 Coffee System CVA615 Coffee System – List of TablesTable 6-2:Service Mode Navigation Technical Information2Coffee Dispensers Height-Adjustable 1.0Construction and Design1.1Appliance Overview 1Hot Water DispenserFigure 1-2: CVA Controls 1.1.2Controls1.1.3Interior Front of Appliance Opened Electrical Information 1.2Technical DataProduct Dimensions 7Drive Assembly Cover 8Hot Water / Coffee Heater 1.3Layout of Components6Drive Assembly Mounted to Wall 12Steam Solenoid Valve 13Power Electronic Board2.0Installation Figure 2-1: Operating Manual3.0Commission and Operation 3.1General Operation3.1.3Steam Control 3.1.2Canceling the PreparationFigure 3-4: Canceling the Preparation Process Figure 3-5: Steam Selector3.1.4Hot Water 3.1.5Adjusting the Coffee Grinder Controls3.1.6Filling the Coffee Beans Container 3.1.7Filling the Water Tank 4.0Description of Function 4.1Door Switch4.2Overflow Reed Switch Figure 4-2: Brew Unit in “Home” Position 4.3Brew Unit – Cleaning and Care4.4Brew Unit Removal from the Appliance 4.5Connection of Brew Unit to Drive Mechanism Operation4.6Brewing Procedure 4Water Nozzle Socket 5Bottom Filter Figure 4-5: Brew Unit Components1Outlet 2Top Filter 3Compressed Coffee Refer to Figure 4-6– Brew Unit, Showing Compressed Coffee “Puck” Figure 4-7: Waste Unit Present Switch 4.8Waste Unit Present Switch4.7Grounds Container 1 Magnet for Present Switch Actuation Figure 4-8: Waste Unit4.9Water Tank Figure 4-11: Water Level Switch Float 4.10Water Level SwitchFigure 4-10: Water Level Switch When the water tank is installed, and contains at least 30-33ounces of water; the Water Level Switch is activated and its contacts close 4.11Grinder Assembly Figure 4-12: Grinder AssemblyRefer to Figure 4-12– Grinder Assembly 6Grinding Cone 7Washer 8Intake Worm Gear 4.12Grinder – Overload Protection1Grinder Motor 2Carrier 3Mounting 4Spring 5Ball ANormal Operation BOverload Protection Activated CForce Transfer Interrupted4.13Ground Coffee Dispensing Figure 4-15: Coffee Dispensing Components4.14Dispenser Switch 4Switch – Brew Unit Present Switch 4.15Brew Unit Drives3Locking Mechanism Switch Lug 1Brew Unit Drive Shaft Socket 2SocketRefer to Figure 4-18– Brew Unit Drive Assembly 4.18Heaters 4.16Water Pump4.17Flow Meter Coffee / Hot Water Heater 1R1 & 1R24.19Flow Through Heaters Figure 4-19: Hot Water / Coffee Heater4Temperature Sensor PTC Figure 4-20: Steam Heater1Heater Element 2Thermal Fuse 3Thermostat 4.20Water Path Figure 4-21: Water Path4.20.3Water Path – Hot Water 4.20.1Water Intake4.20.2Water Path - Coffee 4.20.4Water Path – Steam4.21Water Valve Figure 4-22: Water Valve Disassembled4.22Electronic Assemblies 4.22.1Power Electronic4.22.2CPU Electronic Figure 4-24: CPU Control Electronic5.0Service and Maintenance 5.1Lid - Removal5.2Interference Suppression Filter Z1 - Removal 5.3Rear Panel - Removal4.Remove the frame 5.4Adjustment Slide Switch Frame - Removal1.Open the door 2.Pull off the slide switch knobs 3.Disconnect the Door Switch Connections 5.5Door Contact Switch S24 - RemovalRefer to Figure 5-5– Door Switch 5.Remove the Door Switch to the front5.6Base Plate - Removal 3.Remove the Drip Tray - Refer to Figure 5.7Drip Tray - Removal2.Remove the Base Plate – Refer to Section 3. Remove the float 5.8Overflow Switch Actuator Float - Removal1Overflow Switch Float 2Magnet Inside of the Float3.Remove the Overflow Switch 5.9Overflow Switch B8/3 - Removal2.Remove the Overflow Switch Fixing Screw Item 2.Remove the Upper Rear Panel Fixing Screws Item 5.10Rear Door Panel - Removal1.Open the door 3.Remove the Lower Rear Panel Fixing Screws Item3.Remove the Cover Fixing Screws Item 5.11Fascia Panel Cover - Removal2.Remove the Rear Door Panel – Refer to Section 4.Remove the cover5.12Selector Switch - Removal 5.13Display Module Electronic - Removal 5.14Coffee Dispensing Nozzle - Removal 5.15Coffee Dispensing Nozzle - Installation 1.Open the door 5.17Hot Water Nozzle - Removal 5.18Hot Water Valve Y12 - Removal5.19Checking Temperature at Coffee Dispenser 5.20Brew Unit – Removal in Start/Home Position 5.21Brew Unit – Removal NOTin Start/Home Position Figure 5-17: Brew Unit 1Connection Socket 2Retaining Screw5.22Brew Unit - Installation 5.23Brew Unit – Cleaning Procedure5.24Brew Unit – Filter Cleaning 5.25Brew Unit – Degreasing via the Rinse Cycle RINSING RINSING CYCLERINSING CYCLE SELECT PRODUCT READY FOR USE5.26Brew Unit - Lubrication Refer to Figure 5.28Brew Unit Creamer Valve - Removal 5.29Brew Unit Handle - Removal5.30Brew Unit Funnel - Removal 5.31Brew Unit Ram - Service Figure 5-31: Ram Assembly 1Filter Screw 2Filter 3Lubrication Points5.32Brew Unit Drives - Service 16.Refer to Figure 5-32– Front Plate Assembly with Retaining Screws Locations. Remove the two Hot Water / Coffee Heater Screws; Separate the Heater from its mounting position Figure 5-33: Grinder Retaining Screws Figure 5-34: Grinder Retaining Nuts21.Remove the Adjustment Slide Switch Frame Service Tip 3.Remove the cap from the Water Tank 5.33Water Tank Float - Removal1.Open the door 2.Remove the Water Tank 4.Remove the Water Tank Float3.Lever off the Lip Seal Cap 5.34Water Tank Lip Seal - Removal2.Remove the Water Tank – Refer to Section 4.Remove the Lip Seal5.35Lower Section of Tank Valve - Removal 3.Remove the Lip Seal Refer to Figure5.Remove the Bottom Plate and Drip Tray 7.Remove the lower part of the valve5.36Beans Container - Removal 5.37Beans Container Guide - Removal 5.38Grinder - Disassembly 10.Remove the bracket Figure 5-45,Item Refer to Figure 5-46– Grinder – Apart 5.39Grinder Assembly – Basic Setting 5.40Grinder Unit - Removal 5.42Dispenser Switch - Removal 5.41Dispensing Solenoid - Removal5.43Waterpath & Flowmeter - Testing 5678 344.Release all three coffee buttons 5.44Water Path Leakage Test 5.45Water Path Connections - Opening 5.46Water Path Connections - Closing6.0Fault Diagnosis 6.1Programming ModeAcknowledgement Indicator 6.2Service ModeAccess Initial requirementsService Mode - Navigation Information 6.3Displayed MessagesDisplayed Message The level switch has been actuated by water being Brew Unit cannot be removed from the appliance 6.4Fault DiagnosisBrew Unit cannot be installed Perform the following