TECHNICAL INFORMATION CVA615 Coffee System © 2007 Miele USA
CVA615 Coffee System Technical Information CVA615 Coffee System – Table of Contents 1.0 Construction and Design.........................................................................9 1.1 1.2 1.3 Appliance Overview................................................................................... 9 1.1.1 Front View...................................................................................... 9 1.1.2 Controls ......................................................................................
CVA615 Coffee System Technical Information CVA615 Coffee System – Table of Contents (continued) 4.21 4.22 5.0 4.20.3 Water Path – Hot Water.............................................................. 43 4.20.4 Water Path – Steam ................................................................... 43 Water Valve ............................................................................................. 44 Electronic Assemblies ...........................................................................
CVA615 Coffee System Technical Information CVA615 Coffee System – Table of Contents (continued) 5.37 5.38 5.39 5.40 5.41 5.42 5.43 5.44 5.45 5.46 6.0 Beans Container Guide - Removal.......................................................... 87 Grinder - Disassembly ............................................................................. 88 Grinder Assembly – Basic Setting ........................................................... 91 Grinder Unit - Removal.............................................
CVA615 Coffee System Technical Information CVA615 Coffee System – List of Figures Figure 1-1: Figure 1-2: Figure 1-3: Figure 1-4: Figure 1-5: Front Overview CVA615............................................................................... 9 CVA Controls.............................................................................................. 10 Interior View of CVA615 with Door Opened ............................................... 10 CVA615 Product Dimensions .....................................
CVA615 Coffee System Technical Information CVA615 Coffee System – List of Figures (continued) Figure 5-1: Figure 5-2: Figure 5-3: Figure 5-4: Figure 5-5: Figure 5-6: Figure 5-7: Figure 5-8: Figure 5-9: Figure 5-10: Figure 5-11: Figure 5-12: Figure 5-13: Figure 5-14: Figure 5-15: Figure 5-16: Figure 5-17: Figure 5-18: Figure 5-19: Figure 5-20: Figure 5-21: Figure 5-22: Figure 5-23: Figure 5-24: Figure 5-25: Figure 5-26: Figure 5-27: Figure 5-28: Figure 5-29: Figure 5-30: Figure 5-31: Figure 5-32: Figure 5-3
CVA615 Coffee System Technical Information CVA615 Coffee System – List of Figures (continued) Figure 5-43: Figure 5-44: Figure 5-45: Figure 5-46: Figure 5-47: Figure 5-48: Figure 5-49: Figure 5-50: Figure 5-51: Beans Container Guide .............................................................................. 87 Grinder - Disassembly ................................................................................ 88 Grinder..................................................................................
CVA615 Coffee System Technical Information CVA615 Coffee System – List of Tables Table 6-1: Table 6-2: Table 6-3: Table 6-4: Programming Mode Navigation .................................................................. 98 Service Mode Navigation.......................................................................... 100 Displayed Messages (Continued on Table 6-4) ....................................... 101 Displayed Messages (Continued from Table 6-3) ....................................
CVA615 Coffee System Technical Information 1.0 Construction and Design 1.1 Appliance Overview 1.1.
CVA615 Coffee System Technical Information 1.1.2 Controls 7 8 9 10 11 Program Selector Message Window Coffee Serving Buttons Rinse / Pre-Warm Button Hot Water Button Figure 1-2: CVA Controls 1.1.
CVA615 Coffee System Technical Information 1.2 Technical Data Product Dimensions Figure 1-4: CVA615 Product Dimensions Electrical Information The appliance comes equipped with a 6ft (1.8 m) power cord with a NEMA 5-15P molded plug for connection to a 120 V, 15 A, 60 Hz power supply.
CVA615 Coffee System Technical Information 1.
CVA615 Coffee System Technical Information 2.0 Installation Refer to the Installation section of the Operating Manual.
CVA615 Coffee System Technical Information 3.0 Commission and Operation 3.1 General Operation 3.1.1 Preparing Coffee 1. Place a cup under both coffee dispensing ports. Figure 3-1: Cup Under the Dispensing Ports 2. Press the desired size coffee button once. This will start the preparation cycle.
CVA615 Coffee System Technical Information 3.1.2 Canceling the Preparation Press any one of the coffee buttons to stop preparation immediately. Figure 3-4: Canceling the Preparation Process 3.1.3 Steam Control Caution: The steam from the appliance is extremely hot; use caution to prevent burns. • • Turn the steam ON by turning the Steam Selector counter-clockwise. Turn the steam OFF by turning the Steam Selector clockwise.
CVA615 Coffee System Technical Information 3.1.4 Hot Water 1. Place a cup under the hot water dispenser. Figure 3-6: Placement of Cup Under the Hot Water Dispenser 2. Press the hot water button. Hot water will be dispensed. 3. Press the hot water button again to stop the flow of hot water.
CVA615 Coffee System Technical Information 3.1.5 Adjusting the Coffee Grinder Controls Slide to the left for finer grinding. Slide to the right for coarser grinding. Figure 3-8: Grinder Controls If the espresso flows too quickly into the cup, the beans may have been ground too coarsely. The grinder should be adjusted to a finer setting. If the espresso only trickles into the cup, the beans may have been ground too fine and the coffee will be bitter.
CVA615 Coffee System Technical Information 3.1.6 Filling the Coffee Beans Container 1. 2. 3. 4. 5. 6. Open the appliance door. Carefully slide the container out so that the lid is visible. Lift the lid. Fill the container with coffee beans to about 1" from the top. Close the lid and push the container back into place. Shut the appliance door. Figure 3-9: Adding Coffee Beans Important! Only put whole espresso or coffee beans in the container.
CVA615 Coffee System Technical Information 3.1.7 Filling the Water Tank The water tank must be washed and filled with fresh drinking water each day. 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 liquid except cold water to the water tank. 4.
CVA615 Coffee System Technical Information 4.0 Description of Function 4.1 Door Switch The door switch, removes power to the appliance when the door is opened. Refer to Figure 4-1 – Door Contact Switch (S24). Figure 4-1: Door Contact Switch (S24) 4.2 Overflow (Reed) Switch The overflow switch is in the lower section of the appliance case. The float with magnet is located in the drip tray. Should a leak develop, water flows into the drip tray.
CVA615 Coffee System Technical Information 4.3 Brew Unit – Cleaning and Care The Brew Unit is a mechanically operated component that is subjected to high forces. After a long period of use, the Brew Unit may become clogged. To ensure correct operation of the Brew Unit, it is essential to clean it regularly and apply silicone grease to the moving parts. Refer to Section 5.0 – Service and Maintenance for further information and procedures. 4.
CVA615 Coffee System Technical Information 4.5 Connection of Brew Unit to Drive Mechanism 1 2 3 4 5 6 Drive Shaft Socket Water Connection Socket Locking Mechanism Switch Lug Brew Unit Switch Water Nozzle Drive Shaft Figure 4-3: Brew Unit Connections Operation Refer to Figure 4-3 – Brew Unit Connections. When the Brew Unit is placed into in the appliance, it locks into position. The locking mechanism Switch Lug (Item 3), activates the Brew Unit Switch (Item 4).
CVA615 Coffee System Technical Information 4.6 Brewing Procedure 1. The grinder fills the dispenser housing until full (as determined by the dispenser switch). 2. The grinder is then switched off. 3. The dispenser flap opens twice (two clicks) via the dispenser solenoid assembly. 4. The ground coffee then falls into the brew unit via the funnel. 1 2 3 Funnel Percolator Chamber Bottom Filter Figure 4-4: Brew Unit Filters Refer to Figure 4-5 – Brew Unit Components. 5.
CVA615 Coffee System Technical Information 1 2 3 4 5 Outlet Top Filter Compressed Coffee Water Nozzle Socket Bottom Filter Figure 4-5: Brew Unit Components 24
CVA615 Coffee System Technical Information Refer to Figure 4-6 – Brew Unit, Showing Compressed Coffee “Puck”. 7. As the drive begin to move back toward the starting (home) position the coffee chamber moves upward and releases the used compressed coffee grounds (puck). Pos. 1. 8. The drive continues and returns the brew unit to its starting (home) position.
CVA615 Coffee System Technical Information 4.7 Grounds Container After coffee has been prepared, the coffee grounds compressed puck falls into the waste container. The electronic monitors the number of the compressed pucks. After a specific amount is reached, the message “Empty waste unit” is displayed. 4.8 Waste Unit Present Switch A reed switch is mounted to the bottom of the housing – as shown in the Figure 4-7.
CVA615 Coffee System Technical Information The actuating magnet (Figure 4-8, Item 1) for the Waste Unit switch is fitted in the bottom edge of the container. The electronic monitors whether the waste unit is installed. 1 Magnet for Present Switch Actuation Figure 4-8: Waste Unit When the appliance is placed into the Service Mode, the top line of the display shows the switches that have been activated. A “5” is displayed when the Waste Unit is installed and the switch is actuated.
CVA615 Coffee System Technical Information 4.9 Water Tank Refer to Figure 4-9 – Water Tank. The Water Tank holds the water required for the brewing of the coffee, hot water and steam. When the Water Tank is installed, the sealing ring is pressed upwards allowing water to flow out.
CVA615 Coffee System Technical Information 4.10 Water Level Switch The Water Level Switch is located within the housing (as shown in Figure 4-10, Item 1). Figure 4-10: Water Level Switch The actuating magnet for the Water Level Switch is located in the Water Tank as shown below (Figure 4-11, Item 1).
CVA615 Coffee System Technical Information When the water tank is installed, and contains at least 30-33 ounces of water; the Water Level Switch is activated and its contacts close. If the water quantity drops below the minimum quantity, the water level switch is no longer activated and the contacts open. After the switch opens, the water passing through the water pump is registered via the flowmeter and recorded by the electronic unit as up to 27 ounces of water is still available.
CVA615 Coffee System Technical Information 4.
CVA615 Coffee System Technical Information Refer to Figure 4-12 – Grinder Assembly. The grinding grade depends on the gap between the Grinding Cone and the Grinding Ring. The gap is set via an adjustment lever fitted to the adjustment ring. The smaller the gap, the finer the coffee grind. Warning! To avoid damage to the grinder, the grinder should only be adjusted in small steps.
CVA615 Coffee System Technical Information 4.12 Grinder – Overload Protection If the grinder becomes blocked, a slip coupling interrupts the drive between the motor and the grinder.
CVA615 Coffee System Technical Information Refer to Figure 4-13 – Components of the Grinder Overload Protection. The Grinder Motor (Item 1) drives the mounting (Item 3) via the carriers (Item 2). The rotary force is then transferred via the balls, (Item 5) to the grinder cone (Item 6). Should the Grinder Cone become blocked the balls are pressed into the mounting (as shown below in figure C). The drive force is interrupted; and the worm gear continues to operate via the mounting.
CVA615 Coffee System Technical Information 4.13 Ground Coffee Dispensing 1 2 3 4 5 6 7 8 9 10 Dispenser Lever Switch – Dispensing (1S13) Catch – Switch – Dispensing Catch – Coil – Dispensing Coil – Dispensing (1L1) Spring Actuator Bolt Dispenser Flap Wiper Figure 4-15: Coffee Dispensing Components By adjusting the dispenser lever (Figure 4-15, Item 1), the position of the switch slide, in the dispenser container is modified.
CVA615 Coffee System Technical Information The grinder fills the dispenser container with ground coffee. When the dispenser container is full, the dispensing switch is actuated and the grinder motor is switched off. Figure 4-16: Dispensing Lever To fill the brew unit - the dispensing solenoid is energized twice and the dispenser flap opens twice. The ground coffee drops from the dispenser container into the brew unit.
CVA615 Coffee System Technical Information 4.15 Brew Unit Drives Refer to Figure 4-17 – Components of the Brew Unit Drive Assembly, Water Connection and Present Switch. When the brew unit is placed in the appliance, 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.
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.
CVA615 Coffee System Technical Information 4.16 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.
CVA615 Coffee System Technical Information 4.19 Flow Through Heaters The Coffee Flow Through Heater (Figure 4-19 – Hot Water / Coffee Heater) has a large heater element; and a small heater element. The Steam Flow Heater has only one heater element (refer to figure 4-20 – Steam Heater) Each Flow Through Heater has a Positive Thermal Coefficient (PTC) Temperature Sensor that provides a signal to the electronic unit for temperature control.
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.
CVA615 Coffee System Technical Information 4.
CVA615 Coffee System Technical Information 4.20.1 Water Intake The Pump takes in water from the water tank. (The Pump is fitted with a safety valve which opens at approx. 16 bar (232 psi) system pressure. If the pressure is too high and the safety valve opens, water is drained off via a hose to the drip tray). 4.20.2 Water Path - Coffee The water is then pumped under pressure through the Flowmeter, and through the Coffee Flow Through Heater.
CVA615 Coffee System Technical Information 4.21 Water 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.
CVA615 Coffee System Technical Information 4.22 Electronic Assemblies 4.22.
CVA615 Coffee System Technical Information 4.22.
CVA615 Coffee System Technical Information 5.0 Service and Maintenance Danger! To avoid the risk of electrical shock, the appliance should be disconnected from the power source before any service procedures are performed. 5.1 Lid - Removal 1. Remove the Lid Screws, as shown in Figure 5-1. 2. Remove the lid.
CVA615 Coffee System Technical Information 5.2 Interference Suppression Filter (Z1) - Removal 1. 2. 3. 4. Perform: Lid removal – Refer to Section 5.1. Remove the Mains Filter Nut (Figure 5-2 - Item 1). Remove the Filter. Disconnect the Mains Filter electrical connections Figure 5-2: Interference Suppression Filter (Z1) Mounting Location 5.3 Rear Panel - Removal 1. 2. 3. 4. 5. Remove the lid – Refer to Section 5.1. Remove the Mains Filter – Refer to Section 5.2.
CVA615 Coffee System Technical Information 5.4 Adjustment Slide Switch Frame - Removal 1. 2. 3. 4. Open the door. Pull off the slide switch knobs. Press the retaining lugs inwards with a small screwdriver (Figure 5-4). Remove the frame.
CVA615 Coffee System Technical Information 5.5 Door Contact Switch (S24) - Removal Refer to Figure 5-5 – Door Switch. 1. 2. 3. 4. 5. Remove the lid – Refer to Section 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.
CVA615 Coffee System Technical Information 5.6 Base Plate - Removal 1. Remove the Lid, Mains and Rear Panel – Refer to Sections 5.1 and 5.3. 2. Open the door. 3. Remove the Waste Container. 4. Remove the Water Tank. 5. 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 using a suitable device. 7. Remove the Brew Unit – Refer to Section 5.20. 8. Remove the Coffee Beans from their container. 9.
CVA615 Coffee System Technical Information 5.7 Drip Tray - Removal 1. Remove the Lid, Mains and Rear Panel – Refer to Sections 5.1 and 5.3. 2. Remove the Base Plate – Refer to Section 5.6. 3. Remove the Drip Tray - Refer to Figure 5-7.
CVA615 Coffee System Technical Information 5.8 Overflow Switch Actuator Float - Removal 1. Remove the Lid, Mains and Rear Panel – Refer to Sections 5.1 and 5.3. 2. Remove the Base Plate – Refer to Section 5.6. Note: Ensure the float is re-installed in the same direction as when it was removed. 3. Remove the float.
CVA615 Coffee System Technical Information 5.9 Overflow Switch (B8/3) - Removal 1. Remove the Lid, Mains and Rear Panel – Refer to Sections 5.1 and 5.3. 2. Remove the Overflow Switch Fixing Screw (Item 1). 3. Remove the Overflow Switch. 4. Disconnect the Overflow Switch connections from the Electronic.
CVA615 Coffee System Technical Information 5.10 Rear Door Panel - Removal 1. Open the door. 2. Remove the Upper Rear Panel Fixing Screws (Item 1). 3. Remove the Lower Rear Panel Fixing Screws (Item 2).
CVA615 Coffee System Technical Information 5.11 Fascia Panel Cover - Removal 1. 2. 3. 4. 1 2 3 4 5 6 Open the door. Remove the Rear Door Panel – Refer to Section 5.10. Remove the Cover Fixing Screws (Item 3). Remove the cover.
CVA615 Coffee System Technical Information 5.12 Selector Switch - Removal 1. Open the door. 2. Remove the Rear Door Panel and Fascia Panel Cover – Refer to Section 5.10 and 5.11. – Refer to Section 5.10 and 5.11. 3. Unplug the electrical connection 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.
CVA615 Coffee System Technical Information 5.13 Display Module Electronic - Removal 1. Open the door. 2. Remove the Rear Door Panel and Fascia Panel Cover – Refer to Section 5.10 and 5.11. – Refer to Section 5.10 and 5.11. 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).
CVA615 Coffee System Technical Information 5.14 Coffee Dispensing Nozzle - Removal 1. Open the door. 2. Remove the Grille and Drip Tray from the door – Refer to Section 5.7. 3. Remove the fixing screws from the white panel under and behind the nozzle. 4. Remove the white panel. Note: The two 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.
CVA615 Coffee System Technical Information 5.15 Coffee Dispensing Nozzle - Installation Refer to Figure 5-14 – Components of the Coffee Dispensing Nozzle. 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 screws for the coffee dispensing nozzle should be tightened by hand only as they can easily be over tightened. 4.
CVA615 Coffee System Technical Information 5.16 Steam Valve and Steam Valve Switch (S79) - Removal 1. Open the door. 2. Remove the Rear Door Panel and Fascia Panel Cover – Refer to Section 5.10 and 5.11. – Refer to Section 5.10 and 5.11. 3. Pull off the Switch Knob (Item 8). 4. Remove the holder fixing screws (Item 3). 5. Remove the holder. 6. Remove the Steam Valve Switch screws (Item 10). 7. Remove the Steam Valve Switch. 8. Disconnect the electrical connections.
CVA615 Coffee System Technical Information 5.17 Hot Water Nozzle - Removal 1. Open the door. 2. Remove the Rear Door Panel and Fascia Panel Cover – Refer to Section 5.10 and 5.11. 3. Loosen the nut (Item 2). 4. Remove the holder (Item 5). 5. Unscrew the sleeve, (Item 1) from the connector (Item 6). 6. Pull out the Hot Water Nozzle (Item 3), from the connector.
CVA615 Coffee System Technical Information 5.19 Checking Temperature at Coffee Dispenser Warning! To avoid adverse operating conditions: Do not deviate from the procedure. Do not change any other settings or values during this procedure. 1. 2. 3. 4. 5. Set the grinding grade to medium. Set the coffee quantity to medium. Set the Medium Coffee temperature to medium (standard setting). Turn off the appliance. Press and hold the Small Coffee Button, Large Coffee Button and the Hot Water Button.
CVA615 Coffee System Technical Information 11. Set the value to “350” as follows: Press the Large Coffee Button to increase the value. Press the Medium Coffee Button to decrease the value. Note: Each press of the Large or Medium Coffee will change the displayed value by 1. (i.e. 347…348…349…350) 12. Press the Small Coffee Button 1 time to store the value. 13. Turn the selector switch to the “Off” position. 14. Turn the selector switch to the On or On with Light position. 15.
CVA615 Coffee System Technical Information 5.21 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 proceeding close the front door, turn the power on to initiate a drive reset during the start-up sequence. Once “Ready...
CVA615 Coffee System Technical Information 1 2 Connection Socket Retaining Screw Figure 5-17: Brew Unit Figure 5-18: Brew Unit Connection Socket Retaining Screw and Locking Tab 66
CVA615 Coffee System Technical Information 5.22 Brew Unit - Installation 1. Remove the Waste Container. 2. Slide the Brew Unit into position in the appliance until the locking mechanism engages with the mounting plate. Note: Do not press the part marked PRESS during the installation of the brew unit. 5.23 Brew Unit – Cleaning Procedure Note: Clean the Brew Unit by hand only; it SHOULD NOT be cleaned in a dishwasher. Lubricate the Brew Unit with silicon every 500 cups. 1. Remove the Waste Container.
CVA615 Coffee System Technical Information 5. 6. 7. 8. Rub away coffee residues from the steel filters with a sponge. Dry the funnel to prevent ground coffee from sticking. After cleaning press "PRESS". Remove the Waste Container (if re-installed). Figure 5-20: Brew Unit Installation 9. Push the brew unit in the track straight into the appliance without pressing "PRESS" until it clicks in place (refer to Figure 5-20 – Brew Unit Installation). 5.24 Brew Unit – Filter Cleaning 1.
CVA615 Coffee System Technical Information 5.25 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. 1. Remove the Waste Container. 2. Remove the Brew Unit and put the detergent tablet in the brew unit funnel.
CVA615 Coffee System Technical Information 8. Press ENTER. The display will read: RINSING CYCLE 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: SELECT PRODUCT READY FOR USE The Brew Unit is now clean and ready to use.
CVA615 Coffee System Technical Information 5.26 Brew Unit - Lubrication 1. Remove the Brew Unit – Refer to Section 5.20. Note: Check that the Brew Unit is in the basic position with the funnel slightly lifted and the socket in vertical position. 2. Refer to Figure 5-22, lubricate the following: A B C D Joints Axel Tracks Gasket Figure 5-22: Brew Unit Lubrication Points 3. Refer to Figure 5-23, lubricate the following: E F Bolt Assembly Joints Figure 5-23: Brew Unit Lubrication Points 4.
CVA615 Coffee System Technical Information 5.27 Brew Unit – Manual Reset to “Home Position” (with Brew Unit Not Installed in Appliance) Refer to Figure 5-24. 1. Press on the latch A; and press the funnel down B. 2. Push the connection piece to the far left position C. 3. Press "PRESS" once. Figure 5-24: Moving the Brew Unit to “Home Position” 4. The “Home” position (Figure 5-25) after resetting the Brew Unit. The Brew Unit can now be installed into the appliance.
CVA615 Coffee System Technical Information 5.28 Brew Unit Creamer Valve - Removal 1. 2. 3. 4. 5.29 Remove the Brew Unit – Refer to Section 5.20. Remove the output fixing screws. Remove the output. Remove the spring and Creamer Valve. Brew Unit Handle - Removal 1. Remove the Brew Unit from the appliance – Refer to Section 5.20. 2. Press the handle retaining lugs inwards (Figure 5-26). 3. Remove the handle.
CVA615 Coffee System Technical Information 5.30 Brew Unit Funnel - Removal 1. Remove the Brew Unit from the appliance – Refer to Section 5.20. 2. Press the Funnel Locking Lug (Figure 27, Item 1), so that the funnel is no longer raised. 3. Lever the funnel upwards out of its holder (Figure 5-28). Note: When installing the Funnel, ensure the spring (Figure 5-28, Item 1) is seated correctly.
CVA615 Coffee System Technical Information 5.31 Brew Unit Ram - Service 1. Remove the Brew Unit from the appliance – Refer to Section 5.20. 2. Remove the funnel. 3. Remove the bottom filter screw and filter (Figure 5-29, Items 1 and 2). Figure 5-29: 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.
CVA615 Coffee System Technical Information 6. Clean the brewing chamber (Figure 5-30), ram and bottom filter by hand with warm water without detergent, then dry. 7. Apply silicone grease to the ram lubrication points.
CVA615 Coffee System Technical Information 5.32 Brew Unit Drives - Service 1. 2. 3. 4. Disconnect the power. Allow the appliance to cool. Remove the Brew Unit from the appliance – Refer to Section 5.20. Remove the Waste Container from the appliance. Remove the Beans Container and Beans Container Guide – Refer to Section 5.36 and 5.37. 5. Remove the lid – Refer to Section 5.1. 6. Remove the Rear Panel – Refer to Section 5.2.
CVA615 Coffee System Technical Information 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. 17. Refer to Figure 5-32. Remove the two “Cosmetic Fixing” screws. Remove the Cosmetic Fixing from inside the appliance. Figure 5-32: Front Plate Assembly with Retaining Screw Locations 18. Refer to Figure 5-33 – Grinder Retaining Screws and Figure 5-34 – Grinder Retaining Nuts. 19.
CVA615 Coffee System Technical Information Figure 5-33: Grinder Retaining Screws Figure 5-34: Grinder Retaining Nuts 79
CVA615 Coffee System Technical Information 20. Remove the knobs from the Grinder Slide Controls. 21. Remove the Adjustment Slide Switch Frame (5.4). 22. Position the Grinder as necessary to access the Drive Cover and Drive Unit Retaining Screws. Refer to Figure 5-34 for the location of the screws. 23. Remove the two Upper Front Plate Assembly Retaining Screws – as shown in Figure 5-35. 24. Remove all remaining screws from the Front Plate Assembly.
CVA615 Coffee System Technical Information Service Tip: Refer to Figure 5-36. To avoid having to hold the Front Plate Assembly upward while removing the lower screws, a suitable item can be used to temporarily keep the Front Plate Assembly in an elevated position. Figure 5-36: Using a Suitable Item to Keep the Front Plate Assembly Elevated to Access the Screws at the Bottom 27. Position the Drive Assembly so access to the rear cover is possible. 28. Remove the 5 screws that secure the cover. 29.
CVA615 Coffee System Technical Information 5.33 Water Tank Float - Removal 1. 2. 3. 4. Open the door. Remove the Water Tank. Remove the cap from the Water Tank. Remove the Water Tank Float.
CVA615 Coffee System Technical Information 5.34 Water Tank Lip Seal - Removal 1. Open the door. 2. Remove the Water Tank – Refer to Section 5.33. Figure 5-38: Levering Off the Lip Seal Cap 3. Lever off the Lip Seal Cap. 4. Remove the Lip Seal.
CVA615 Coffee System Technical Information 5.35 Lower Section of Tank Valve - Removal 1. 2. 3. 4. Open the door. Remove the Water Tank – Refer to Section 5.33. Remove the Lip Seal (Refer to Figure 5-39). Remove the lower part of the Valve Fixing Screws (Figure 5-40, Item 1).
CVA615 Coffee System Technical Information 5. Remove the Bottom Plate and Drip Tray. 6. Disconnect the lower part of the valve connections. 7. Remove the lower part of the valve.
CVA615 Coffee System Technical Information 5.36 Beans Container - Removal 1. Open the door. 2. Remove the Beans Container End Stop Screw (Figure 5-42). 3. Hold a suitable container under the beans container opening to collect loose beans, remove the beans container.
CVA615 Coffee System Technical Information 5.37 Beans Container Guide - Removal 1. 2. 3. 4. 5. 6. Open the door. Perform the “Beans Container Removal” procedure. Remove the Waste Container, Brew Unit and Water Tank. Remove the Top Lid. Remove the guide retaining screws (Figure 5-43, Item 2). Remove the guide and carrier (Figure 5-43, Item 1). Note: During installing, first fit the carrier (Figure 43, Item 1) in position and then fit the guide on the carrier.
CVA615 Coffee System Technical Information 5.38 Grinder - Disassembly Note: The Grinder Ring and Grinder Cone should only be replaced as a set. 1. 2. 3. 4. 5. 6. 1 2 Open the door. Remove the Beans Container – Refer to Section 5.36. Remove the Waste Container, Brew Unit and Water Tank. Remove the Top Lid. Remove the Beans Container Guide – Refer to Section 5.37. Set the grinding grade adjustment lever to the mid setting. Carrier Retaining Screws Figure 5-44: Grinder - Disassembly 7.
CVA615 Coffee System Technical Information 9. Turn the Adjustment Ring (Figure 5-45, Item 1) counterclockwise until the blue marking aligns with the blue marking on the carrier (Figure 545, Item 2). 1 2 3 Adjustment Ring Carrier Bracket Figure 5-45: Grinder 10. Remove the bracket (Figure 5-45, Item 3). 11. Remove the coffee residues, e.g. with a vacuum cleaner. Note: The Grinding Cone Fixing Screw has a left-hand thread. 12.
CVA615 Coffee System Technical Information Refer to Figure 5-46 – Grinder – Apart 15. Remove the Grinding Cone (Item 6). 16. Remove the balls (Item 8). 17. Remove the mounting (Item 7). 18. Remove the springs (Item 9). 19. Remove the carriers (Item 10). 20. Remove the felt ring (Item 11).
CVA615 Coffee System Technical Information 5.39 Grinder Assembly – Basic Setting Refer to Figure 5-46 – Grinder - Apart. Note: Before setting the grinder, remove all coffee from the grinder. 1. 2. 3. 4. 5. 6. 7. 8. Install the Felt Ring (Item 11). Install the carriers (Item 10). Install the mounting (Item 7). Install the springs (Item 9). Install the balls (Item 8). Install the Grinding Cone (Item 6), ensure the balls are seated. Install the washer (Item 3).
CVA615 Coffee System Technical Information 5.40 Grinder Unit - Removal 1. 2. 3. 4. 5. 6. 7. 8. 9. Open the door. Remove the Beans Container – Refer to Section 5.36. Remove the Waste Container, Brew Unit and Water Tank. Remove the Top Lid. Remove the Beans Container Guide – Refer to Section 5.37. Remove the Adjustment Slide Switch Frame. Remove the Adjustment Lever Fixing Screws and Lever. Remove the cover fixing screws (Figure 5-47, Item 4). Remove the cover.
CVA615 Coffee System Technical Information 10. Remove the plug from the electronic unit. 11. Lift the grinder upwards from the dampers (Figure 5-48, Item 2). 1 2 3 Motor Holder Damper Mounting Plate Figure 5-48: Grinder Coupling Note: When installing the grinder, the dampers should be firmly seated in the mounting plate and motor holder. Ensure the grinder coupling is completely secured so grinder noise is kept to a minimum. 5.41 Dispensing Solenoid - Removal 1. 2. 3. 4. 5. 6. 7. 5.
CVA615 Coffee System Technical Information 5.43 Waterpath & Flowmeter - Testing Caution! Hot water will flow from the water spout during this procedure. 1. Fill the water reservoir. 2. Place the appliance into the Service Mode with the Selector Knob in the Programming position. Refer to Section 6 – Fault Diagnosis for further information on service mode access. 3.
CVA615 Coffee System Technical Information Figure 5-49: Test Jumper Position 4. Release all three coffee buttons. 5. Remove the jumper and reconnect JP25. 6. Press and hold all three coffee buttons. Observe the number displayed in the bottom right of display (refer to Figure 5-50).
CVA615 Coffee System Technical Information 5.44 Water Path Leakage Test In the event water is present in bottom of the appliance, or a leak is suspected; the following procedure will help in locating the source of the leak. Caution! Heaters can be hot during this test and hot water may escape from the system. 1. Fill the Water reservoir completely 2. Place the appliance into the Service Mode with the Selector Knob in the Programming position.
CVA615 Coffee System Technical Information 5.45 Water Path Connections - Opening Danger! Risk of burning or scalding! Components may be hot. Pressurized steam may exist in the system. Before any service work is performed, allow time to cool. Refer to Figure 5-51 – Water Path Connection. 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 5-51: Water Path Connection 5.
CVA615 Coffee System Technical Information 6.0 Fault Diagnosis 6.1 Programming Mode The Programming Mode is designed for access by the customer to for changes various setting and change features.
CVA615 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. 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.
CVA615 Coffee System Technical Information Service Mode - Navigation LOCK PROGRAM MODE LIGHT ON W/ LIGHT ON Large Coffee Displays Water Temperature for Water Heater and Steam Heater in Celsius.
CVA615 Coffee System Technical Information 6.3 Displayed Messages Displayed Message Information The brew unit is dirty. The brew unit is blocked. BREW UNIT BLOCKED The brew unit is Jammed. • Clean / inspect brew unit / check drives. Air is present with the water system – EXPEL AIR • Perform “Expel Air” procedure. The bean 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).
CVA615 Coffee System Technical Information Displayed Message Information 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.
CVA615 Coffee System Technical Information 6.4 Fault Diagnosis When two cups of coffee / espresso are being prepared at the same time, the cups are filled unevenly. Appliance is not level. - Level the appliance Coffee nozzle is dirty. - Clean the coffee nozzle. Brew Unit cannot be removed from the appliance. The brew unit is not in the starting (home) position. - Reset the brew unit to the starting (home) position. The brew unit is jammed and cannot be removed by resetting the appliance (i.
CVA615 Coffee System Technical Information Grinding grade cannot be set finer (adjustment lever appears jammed) Ground coffee is between the grinding ring and grinding cone. The ground coffee prevents the gap between the grinding ring and grinding cone from being reduced. - Perform the following: 1. Set the adjustment lever to the finest setting possible. 2. Prepare a coffee. 3. Set the adjustment lever to a finer setting.
