Miele CVA615 Coffee System Technical Information, 20: Steam Heater, 4Temperature Sensor PTC

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1Heater Element

CVA615 Coffee System

Technical Information

As a final measure each heating circuit uses a temperature safety fuse (Figure 4-20 – Item 3). In the event the temperature became too high due to a fault, this fuse blows and cuts the power being supplied to the heater element. Should this fuse blow, the cause must be located and resolved before the fuse is replaced.

1Heater Element

2Thermal Fuse

3Thermostat

4Temperature Sensor (PTC)

Figure 4-20: Steam Heater

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Image 41

Contents 2007 Miele USA TECHNICAL INFORMATION CVA615 Coffee SystemCVA615 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 Table 6-2:Service Mode Navigation CVA615 Coffee System – List of TablesCVA615 Coffee System Technical Information1.1Appliance Overview 1.0Construction and Design2Coffee Dispensers Height-Adjustable 1Hot Water DispenserFigure 1-2: CVA Controls 1.1.2Controls1.1.3Interior Front of Appliance Opened Electrical Information 1.2Technical DataProduct Dimensions 6Drive Assembly Mounted to Wall 1.3Layout of Components7Drive Assembly Cover 8Hot Water / Coffee Heater 12Steam Solenoid Valve 13Power Electronic BoardFigure 2-1: Operating Manual 2.0Installation3.1General Operation 3.0Commission and OperationFigure 3-4: Canceling the Preparation Process 3.1.2Canceling the Preparation3.1.3Steam Control Figure 3-5: Steam Selector3.1.4Hot Water Controls 3.1.5Adjusting the Coffee Grinder3.1.6Filling 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 Operation 4.5Connection of Brew Unit to Drive Mechanism4.6Brewing 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 Figure 4-8: Waste Unit 1 Magnet for Present Switch Actuation4.9Water 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 Figure 4-12: Grinder Assembly 4.11Grinder AssemblyRefer to Figure 4-12– Grinder Assembly 6Grinding Cone 7Washer 8Intake Worm Gear 4.12Grinder – Overload Protection1Grinder Motor 2Carrier 3Mounting 4Spring 5Ball CForce Transfer Interrupted ANormal Operation BOverload Protection ActivatedFigure 4-15: Coffee Dispensing Components 4.13Ground Coffee Dispensing4.14Dispenser Switch 3Locking Mechanism Switch Lug 4.15Brew Unit Drives4Switch – Brew Unit Present Switch 1Brew Unit Drive Shaft Socket 2SocketRefer to Figure 4-18– Brew Unit Drive Assembly 4.17Flow Meter 4.16Water Pump4.18Heaters Coffee / Hot Water Heater 1R1 & 1R2Figure 4-19: Hot Water / Coffee Heater 4.19Flow Through Heaters4Temperature Sensor PTC Figure 4-20: Steam Heater1Heater Element 2Thermal Fuse 3Thermostat Figure 4-21: Water Path 4.20Water Path4.20.2Water Path - Coffee 4.20.1Water Intake4.20.3Water Path – Hot Water 4.20.4Water Path – SteamFigure 4-22: Water Valve Disassembled 4.21Water Valve4.22.1Power Electronic 4.22Electronic AssembliesFigure 4-24: CPU Control Electronic 4.22.2CPU Electronic5.1Lid - Removal 5.0Service and Maintenance5.3Rear Panel - Removal 5.2Interference Suppression Filter Z1 - Removal4.Remove the frame 5.4Adjustment Slide Switch Frame - Removal1.Open the door 2.Pull off the slide switch knobs Refer to Figure 5-5– Door Switch 5.5Door Contact Switch S24 - Removal3.Disconnect the Door Switch Connections 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 1Overflow Switch Float 5.8Overflow Switch Actuator Float - Removal3. Remove the float 2Magnet Inside of the Float3.Remove the Overflow Switch 5.9Overflow Switch B8/3 - Removal2.Remove the Overflow Switch Fixing Screw Item 1.Open the door 5.10Rear Door Panel - Removal2.Remove the Upper Rear Panel Fixing Screws Item 3.Remove the Lower Rear Panel Fixing Screws Item2.Remove the Rear Door Panel – Refer to Section 5.11Fascia Panel Cover - Removal3.Remove the Cover Fixing Screws Item 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 5.18Hot Water Valve Y12 - Removal 5.17Hot Water Nozzle - 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 Figure 5-17: Brew Unit5.23Brew Unit – Cleaning Procedure 5.22Brew Unit - Installation5.24Brew Unit – Filter Cleaning RINSING RINSING CYCLE 5.25Brew Unit – Degreasing via the Rinse CycleSELECT PRODUCT READY FOR USE RINSING CYCLE5.26Brew Unit - Lubrication Refer to Figure 5.29Brew Unit Handle - Removal 5.28Brew Unit Creamer Valve - Removal5.30Brew Unit Funnel - Removal 5.31Brew Unit Ram - Service 1Filter Screw 2Filter 3Lubrication Points Figure 5-31: Ram Assembly5.32Brew 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 Figure 5-33: Grinder Retaining Screws21.Remove the Adjustment Slide Switch Frame Service Tip 1.Open the door 2.Remove the Water Tank 5.33Water Tank Float - Removal3.Remove the cap from the Water Tank 4.Remove the Water Tank Float2.Remove the Water Tank – Refer to Section 5.34Water Tank Lip Seal - Removal3.Lever off the Lip Seal Cap 4.Remove the Lip Seal3.Remove the Lip Seal Refer to Figure 5.35Lower Section of Tank Valve - Removal7.Remove the lower part of the valve 5.Remove the Bottom Plate and Drip Tray5.36Beans 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 5.41Dispensing Solenoid - Removal 5.42Dispenser Switch - Removal5678 34 5.43Waterpath & Flowmeter - Testing4.Release all three coffee buttons 5.44Water Path Leakage Test 5.46Water Path Connections - Closing 5.45Water Path Connections - Opening6.1Programming Mode 6.0Fault DiagnosisAccess 6.2Service ModeAcknowledgement Indicator 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