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Miele CVA615 manual 4.21Water Valve, 22: Water Valve Disassembled

Models: CVA615

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4.21Water Valve

CVA615 Coffee System

Technical Information

4.21Water Valve

The Water Valve is attached to the output of the Coffee / Hot Water Flow Through Heater. The valve is in a normally closed position.

When the Brew Unit is driven into the brew position the valve mechanically opens and water is supplied to the Brew Unit. This connection must be air / water tight to prevent air from entering the water path, and / or leakage from the occurring.

Figure 4-22:Water Valve (Disassembled)

The two o-rings that form the seal to the brew unit can be accessed from the front / inside area of the appliance - once the brew unit removed. To access the upper seal, the heater must be removed from the appliance.

The Water Valve can be disassembled for service; parts can be replaced individually.

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Miele CVA615 manual 4.21Water Valve, 22: Water Valve Disassembled

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 CVA615 Coffee System – List of Figures continued Figure 5-43:Beans Container GuideCVA615 Coffee System – List of Tables Table 6-2:Service Mode NavigationCVA615 Coffee System Technical Information1.0Construction and Design 1.1Appliance Overview2Coffee Dispensers Height-Adjustable CVA615 Coffee System Technical Information1.1.2Controls 1.1.3Interior Front of Appliance OpenedCVA615 Coffee System Technical Information Figure 1-2: CVA Controls1.2Technical Data Product DimensionsElectrical Information CVA615 Coffee System Technical Information1.3Layout of Components 6Drive Assembly Mounted to Wall7Drive Assembly Cover 8Hot Water / Coffee Heater 12Steam Solenoid Valve 13Power Electronic BoardFigure 2-1: Operating Manual 2.0InstallationCVA615 Coffee System Technical Information 3.0Commission and Operation 3.1General Operation3.1.2Canceling the Preparation Figure 3-4: Canceling the Preparation Process3.1.3Steam Control 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 CVA615 Coffee System Technical Information Figure 4-5: Brew Unit Components1Outlet 2Top Filter 3Compressed Coffee 4Water Nozzle Socket 5Bottom FilterRefer to Figure 4-6– Brew Unit, Showing Compressed Coffee “Puck” Figure 4-7: Waste Unit Present Switch 4.8Waste Unit Present Switch4.7Grounds Container Figure 4-8: Waste Unit 1 Magnet for Present Switch ActuationCVA615 Coffee System Technical Information 4.9Water 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 CVA615 Coffee System Technical Information 4.11Grinder AssemblyFigure 4-12: Grinder Assembly Refer to Figure 4-12– Grinder Assembly 4.12Grinder – Overload Protection CVA615 Coffee System Technical Information1Grinder Motor 2Carrier 3Mounting 4Spring 5Ball 6Grinding Cone 7Washer 8Intake Worm GearANormal Operation BOverload Protection Activated CForce Transfer Interrupted4.13Ground Coffee Dispensing Figure 4-15: Coffee Dispensing Components4.14Dispenser Switch 4.15Brew Unit Drives 3Locking Mechanism Switch Lug4Switch – Brew Unit Present Switch 1Brew Unit Drive Shaft Socket 2SocketRefer to Figure 4-18– Brew Unit Drive Assembly 4.16Water Pump 4.17Flow Meter4.18Heaters Coffee / Hot Water Heater 1R1 & 1R24.19Flow Through Heaters Figure 4-19: Hot Water / Coffee HeaterCVA615 Coffee System Technical Information Figure 4-20: Steam Heater1Heater Element 2Thermal Fuse 3Thermostat 4Temperature Sensor PTCFigure 4-21: Water Path 4.20Water PathCVA615 Coffee System Technical Information 4.20.1Water Intake 4.20.2Water Path - Coffee4.20.3Water Path – Hot Water 4.20.4Water Path – Steam4.21Water Valve Figure 4-22: Water Valve DisassembledCVA615 Coffee System Technical Information 4.22Electronic Assemblies4.22.1Power Electronic Figure 4-24: CPU Control Electronic 4.22.2CPU ElectronicCVA615 Coffee System Technical Information CVA615 Coffee System Technical Information 5.0Service and Maintenance5.1Lid - Removal 5.2Interference Suppression Filter Z1 - Removal 5.3Rear Panel - Removal5.4Adjustment Slide Switch Frame - Removal 1.Open the door 2.Pull off the slide switch knobs4.Remove the frame CVA615 Coffee System Technical Information5.5Door Contact Switch S24 - Removal Refer to Figure 5-5– Door Switch3.Disconnect the Door Switch Connections 5.Remove the Door Switch to the front5.6Base Plate - Removal 5.7Drip Tray - Removal 2.Remove the Base Plate – Refer to Section3.Remove the Drip Tray - Refer to Figure CVA615 Coffee System Technical Information5.8Overflow Switch Actuator Float - Removal 1Overflow Switch Float2.Remove the Base Plate - Refer to Section 3. Remove the float5.9Overflow Switch B8/3 - Removal 2.Remove the Overflow Switch Fixing Screw Item3.Remove the Overflow Switch CVA615 Coffee System Technical Information5.10Rear Door Panel - Removal 1.Open the door2.Remove the Upper Rear Panel Fixing Screws Item 3.Remove the Lower Rear Panel Fixing Screws Item5.11Fascia Panel Cover - Removal 1.Open the door2.Remove the Rear Door Panel – Refer to Section 3.Remove the Cover Fixing Screws Item5.12Selector 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 1Connection Socket 2Retaining Screw CVA615 Coffee System Technical InformationFigure 5-17: Brew Unit 5.22Brew 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 1Filter Screw 2Filter 3Lubrication Points Figure 5-31: Ram AssemblyCVA615 Coffee System Technical Information 5.32Brew 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 5-34: Grinder Retaining Nuts CVA615 Coffee System Technical InformationFigure 5-33: Grinder Retaining Screws 21.Remove the Adjustment Slide Switch Frame Service Tip 5.33Water Tank Float - Removal 1.Open the door 2.Remove the Water Tank3.Remove the cap from the Water Tank 4.Remove the Water Tank Float5.34Water Tank Lip Seal - Removal 1.Open the door2.Remove the Water Tank – Refer to Section 3.Lever off the Lip Seal Cap5.35Lower Section of Tank Valve - Removal 1.Open the door2.Remove the Water Tank – Refer to Section 3.Remove the Lip Seal Refer to FigureCVA615 Coffee System Technical Information 5.Remove the Bottom Plate and Drip Tray7.Remove the lower part of the valve CVA615 Coffee System Technical Information 5.36Beans Container - Removal1.Open the door 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 Mode6.2Service Mode AccessAcknowledgement Indicator Initial requirementsService Mode - Navigation CVA615 Coffee System Technical Information6.3Displayed Messages CVA615 Coffee System Technical InformationDisplayed Message InformationThe level switch has been actuated by water being CVA615 Coffee SystemTechnical Information Displayed MessageBrew Unit cannot be removed from the appliance 6.4Fault DiagnosisBrew Unit cannot be installed Perform the following