TECHNICAL INFORMATION CVA 462/CVA 466/CVA 468 Coffee Systems SERVICE MODE 29 Miele USA
CVA 462/CVA 466/CVA 468 Coffee Systems 4.3 Service Mode Initial requirements: Switch the appliance off. Accessing:. Press and hold Hot Water. 2. Press / once. 3. Release Hot Water. 4. Press Hot Water again 3 times; hold on the 3rd time until the service mode is Note: Access has to be completed within seconds. Acknowledgement indicator: Service is shown in the display, along with the service options. Options:. Touch < or > to scroll to the desired service function (see Table 7-4). Press OK to select the function. 2. After selecting a function, touch < or > to scroll to the desired option. See Table 7-4. Press OK to select the option. 3. To go back to the previous menu, touch < or > until Back is marked. Press OK. ID Number ID number ID number of control electronic. EPX The material number of the Mat.no.var. variant file for the control/display electronic is EPL ID number ID number of power electronic. Fault Memory OK Delete All logged faults are shown. All saved faults will be deleted. K/8 (Dish Warmer) : The dish warmer connection is : The dish warmer connection is M25 (Grinder) : The grinder runs. : The grinder switches off. 95
CVA 462/CVA 466/CVA 468 Coffee Systems M26 (Brew Unit) M29 (Ceramic Valve) Initialize Home position Drain position Compressing position Move counterclockwise for set period of time Move clockwise for set period of time Initialize Home position Closed position Hot milk position Pressure release, position Milk froth pressure release Milk froth Hot milk pressure release Pressure release, position 2 Step counterclockwise Step clockwise Continuous clockwise Continuous counterclockwise The brew unit is moved through its positions and then back to the home position. To prevent mechanical damage, always initialize as a last step. The brew unit moves into the specified position. The brew unit moves in the specified direction. through its positions and then back to the home position. To avoid mechanical damage, always initialize as a last step. the home position. the closed position. the hot milk position. pressure release position. the milk froth pressure release position. the milk froth position. the hot milk pressure release position. pressure release position 2. counterclockwise. clockwise. continuously clockwise. Press OK to stop. continuously counterclockwise. Press OK to stop. 96
CVA 462/CVA 466/CVA 468 Coffee Systems M7 (Steam Pump) 2M7 (Coffee/Hot Water Pump) R (Steam Heater) Start Stop The steam pump runs. The steam pump is 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. If this value is greater than zero but less than 33, then the water flow is insufficient (see Fault Code F7, Section 7-3.6). If this value is zero, then there is no water flow (see Fault Code F, Section 7-3.5). The coffee/hot water pump is The steam heater heats. The current temperature at the steam heater will be ly switch on the heater briefly so that it does not get too hot and thus melt the fuse. The steam heater is 2R (Coffee/Hot Water Heater) The coffee/hot water heater heats. The current temperature at the coffee/hot water heater will be ly switch on the heater briefly so that it does not get too hot and thus melt the fuse. The coffee/hot water heater is Y6 (Hot-Water Solenoid) Open Close The solenoid for hot water is opened. The solenoid for hot water is closed. Y62 (Rinsing Open The rinsing solenoid is opened. Solenoid) Close The rinsing solenoid is closed. Y63 (Water Supply Valve) 2Y63 (Water Supply Valve) : The water supply valve is : The water supply valve is : The water supply valve is : The water supply valve is 97
Sensor Test S2/3 (Water Container Maximum Level Switch) CVA 462/CVA 466/CVA 468 Coffee Systems : The water supply valves are Y63+2Y63 (Water Supply Valves) : The water supply valves are Empty the water container or remove it from the appliance. Press OK to drain the water circuit. The flow meter is monitored. When it no longer registers pulses, the drain process is finished. Repeat Drain draining as necessary until no water remains in the circuit. To avoid damaging water-carrying components, always drain the Drain System water system before storing or transporting the machine, especially in winter. Fill the water container with water. Press OK to fill the water circuit. Filling will take place until the water container is empty. Fill Press OK to end the process. To ensure error-free circulation, always fill the system before initial operation. The bean container is empty or B3/4 (Bean not inserted. Container) The bean container is inserted and full. The water container is empty or S2/ (Water not inserted. Container Minimum Level Switch) The water container is inserted and full. The drip tray is not inserted or not S2/2 (Drip Tray Level full. Switch) The drip tray is inserted and full. The water container is not inserted or is inserted and full. The water container is inserted and empty. The milk container is not inserted S2/4 (Milk Container or is inserted but empty. Present/Level Switch) The milk container is inserted and full. S24 (Door Contact The door is closed. Switch) The door is open. The ceramic valve step contact S5/ (Ceramic Valve switch is open. Step Contact Switch) The ceramic valve step contact switch is closed. 98
CVA 462/CVA 466/CVA 468 Coffee Systems Sensor Test Operating Hours S5/4 (Grind Amount Compensation Microswitch) S6/, S6/2 (Brew Unit Position Switches) S6/3 (Ceramic Valve Position Switch) S87/ (Drip Tray Presence Switch) The grind amount compensation switch is open. The grind amount compensation switch is closed. Move the brew unit into the appropriate position using the component test and compare to the switch reading on the display (see Table 7-5). The ceramic valve position switch is open. The ceramic valve position switch is closed. The drip tray is not inserted. The drip tray is inserted. The brew unit is not inserted or is S87/2 (Brew Unit inserted but not locked in place. Presence Switch) The brew unit is inserted and locked in place. S87/4 (Waste The waste container is not Container Presence inserted. Switch) The waste container is inserted. S87/5 (Ground Coffee The ground coffee funnel is open. Funnel Presence The ground coffee funnel is Switch) closed. The dispenser is missing or was not pushed in to the switching point. S87/6 (Dispenser Presence Switch) Total R 2R Portions No. of descaling prog. No. of cleaning prog. Table 7-4: Service Mode Espresso Coffee Cappuccino Latte Macchiato Hot milk Milk froth Hot water Clean milk pipework Clean brew unit The dispenser is correctly inserted. Total operating hours are shown. Operating hours (pure heating time) of the steam heater are shown. Operating hours (pure heating time) of the coffee/hot water heater are shown. The number of servings is The number of descales is The number of cleanings is 99