Technical information

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Technical Information

CVA4070 / CVA4075 Coffee Systems

TECHNICAL INFORMATION

CVA4070 / CVA4075 Coffee System

@ 2006 Miele USA

Summary of content (131 pages)

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CVA4070 / CVA4075 Coffee Systems Technical Information TECHNICAL INFORMATION CVA4070 / CVA4075 Coffee System @ 2006 Miele USA 1
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA4075 - Table of Contents A Warning and Safety Instructions ...........................................................8 1.0 Construction and Design.......................................................................10 1.1 Appliance Overview ............................................................................................. 10 1.1.1 Front View ................................................................................
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA 4075 - Table of Contents (continued) 4.4 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 5.10 5.11 5.12 5.13 5.14 5.15 5.15 4.3.6 Brew unit drive, drain position ................................................................ 36 Water paths ......................................................................................................... 37 4.4.1 General view...............................................................................
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA 4075 - Table of Contents (continued) 6.2 6.3 6.1.19 Appliance variant – Set......................................................................... 117 6.1.20 Descale lock – Reset............................................................................ 118 6.1.21 Cleaning lock – Reset........................................................................... 119 Service mode overview..................................................
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA4075 - List of Figures Figure 1-1: CVA4070 Front Overview ........................................................................... 10 Figure 1-2: CVA4070 Inside Overview.......................................................................... 11 Figure 1-3: CVA4070 Layout Components ................................................................... 16 Figure 2-1: Figure 2-2: Figure 2-3: Figure 2-4: CVA4070 Plumbing ..................
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA4075 - List of Figures (contined) Figure 5-14: CVA4070 Service Door Retaining Screw Removal .................................... 54 Figure 5-15: CVA4070 Microswitch Removal ................................................................. 55 Figure 5-16: CVA4070 Grinder Screw Removal ............................................................. 56 Figure 5-17: CVA4070 Grinder Unit Removal....................................................
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CVA4070 / CVA4075 Coffee Systems Technical Information CVA4070 / CVA 4080 - List of Tables Table 1-1: Table 1-2: Table 1-3: Table 1-4: Technical Data (Continued on Table 1-2) .................................................... 12 Technical Data (Cont. from Table 1-1, Cont. on Table 1-3)......................... 13 Technical Data (Continued from Table 1-2)................................................. 14 CVA4070 Electrical ................................................................................
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CVA4070 / CVA4075 Coffee Systems Technical Information A Warning and Safety Instructions General All repairs should be performed by a trained technician in strict accordance with national, state and local codes. Any repairs or maintenance performed by unqualified personnel could be dangerous. When servicing, modifying, testing or maintaining appliances, all applicable laws, regulations and accident prevention guidelines must be observed.
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CVA4070 / CVA4075 Coffee Systems Technical Information Touch current measurement Note Touch current measurement should be carried out on all accessible conductive parts that are not connected to ground.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1.0 Construction and Design 1.1 Appliance Overview 1.1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1.1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1.2 Technical Data ▪ ▪ ▪ The CVA4070 is designed to be built into cabinets and must be fully installed before any operation. This appliance can be installed above another appliance but, there must be a solid, closed shelf between the base of the coffee machine and the top of the appliance below Exercise caution while operating the appliance; coffee, hot water and steam can cause burns. Model CVA4070, CVA4075 Weight *1 kg 27.
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CVA4070 / CVA4075 Coffee Systems Technical Information Model CVA4070, CVA4075 Equipment Water tank Removable coffee bean container Capacity Waste container Drip tray with spill guard grid for secure transport Height adjustable coffee spouts, adjustable to cup height Liters 2.5 g 500 Portions approx. 25 1 1.8 cm 5.5 – 9.
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CVA4070 / CVA4075 Coffee Systems Technical Information Model CVA4070,CVA4075 Accessories supplied X Kettle-type socket X Milk container and attachment for preparing cappucino X Descaling and cleaning agents X Spoon for ground coffee X Optional accessories available Combination strip HKL 60: Combination strip for use in any combination of oven (60 cm), compact oven, or steam oven and coffee maker.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1.2.1 Electrical Information Model Number Electrical Requirements Plug Style CVA4070 120 VAC 15amp NEMA 5-15 Table 1-4: CVA4070 Electrical 1.2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 2.0 Installation 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 2.2 Installation Procedure Note: Make sure power is not supplied to the appliance while installation or maintenance work is preformed. Disconnect the power supply to the work area by unplugging the unit, tripping the circuit breaker. The coffee system must be installed into cabinetry before being used. Figure 2-2: CVA4070 - Adjusting Feet 1. Unscrew the height adjustable feet (fig. 2-1) on the underside of the machine about 1/16" (2 mm). 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information If your cabinet has 3/4" (19 mm) side walls, drill four holes for the mounting. 3. Center the unit and Make centers of mounting holes. 4. Take the unit of the niche and drill four holes at the screws markings (1/16" [2 mm], diameter 3/16" [4.5 mm]). 5. Plug the appliance into the electrical outlet. 6. Open the door and partially tighten the screws.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.0 Commission and Operation 3.1 General Operation 3.1.1 Touch Controls Select a touch control with your fingertip to use the machine 3.1.2 Display To select a menu, select the touch control next to the respective menu point. If more features can be selected under one menu point, the menu has three dots (e.g, "settings...") "more" / "back": "Clear": "Stop": "OK": 3.1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.1.4 Turning On 1. Select "On/Off" to turn the coffee system on. • The display shows the clock. See "Settings - Clock - Setting the time of day" to set the time. • During the very first use, you will be prompted to select a language. 2. Select the desired language touch control and then "OK". • The symbol indicates the "Language" setting. If you accidentally select an unfamiliar language, simply look for the symbol.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.2 Language Settings To show the displays in the desired language, select the language before the first use. 1. Select "Settings" from the main menu during the pre-heating phase or 2. in the main menu. 3. Select "Language" 4. Select the desired language. To see more language options, select "more". Language options: English, German, Espanol, Francais, Italiano, Polski and Portugues. 5. Select "OK" to save the selection.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.3 Clock Settings 1. Select "Settings". 2. Select "Clock". 3.3.1 Setting the Time of Day 1. 2. 3. 4. 5. 3.3.2 Select "Enter Time". Select "+" or "-" with the right touch controls to select the hours. Set the minutes by selecting "Minutes". Select "+" or "-" with the right touch controls to select the minutes. Select "OK". Clock Display Size The size of the clock display can be adjusted. The options are "normal" or "large". 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.3.4 Clock Display On/Off The clock can be displayed or turned off. • If the display is turned on, the time of day is displayed when the machine is turned off. • If the option is set off, the display turns off after 60 seconds. 1. Select "Clock display". The selected display is highlighted. 2. Select "OK" to save the selection. 3.4 Filling the Water Tank The beans and the water quality is important for a good espresso or coffee.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 3-2: CVA4070 Pull Water Tank Out. 2. Pull the water tank out. 3. Fill the container with fresh, cold tap water to the "Max." mark. 4. Close the lid and push the water tank into the unit until it clicks into place. Note: The water tank must be positioned correctly or the valve will leak. If the water tank has not clicked into place, pull the tank out, check and clean the niche. 3.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3. Push the lid back into place and put the beans container back into the appliance. 4. Close the door. 3.6 Filling Ground Coffee A funnel for ground coffee is provided in case you would like to prepare a different coffee type, e.g. decaffeinated coffee. Figure 3-4: CVA4070 Ground Coffee Funnel Lid 1. Pull the container for the ground coffee out of the appliance and lift the funnel lid. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 3-7: CVA4070 Dispenser Height 1. Pull the coffee dispenser slowly up or down. 3.8 Adjust the Grinder Setting Figure 3-8: CVA4070 Grinder Adjustment 1. Push the slide control to the left for a finer grind or to the right for a coarser grind. • You should be able to feel the notches when moving the slide control. • If the slide control will not move: 1. Close the machine and dispense a cup of coffee. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 3.9 Steam System The appliance has two heating systems. That allow for independent preparation of froth/cappuccino or espresso/coffee. The second heating system can be turned off to save energy during the heating phase e.g. if froth is not prepared very often. When the steam system is turned off and froth or cappuccino is selected, the unit must heat up first to produce steam.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.0 Function 4.1 Optical Interface 1 Optical interface Figure 4-1: CVA4070 Control Panal The appliance is equipped with an optical interface for diagnostic support and program updates (Figure 4-1, item 1). It can be located with the function “Find optical interface” of the Miele Diagnostic Support. 4.2 Control Electronic EPX The control electronic is located in the door (Figure 1-2, Item 8).
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.3 Brew Unit Controls 4.3.1 Position of the Microswitches 1 Microswitch grinding amount compensation 2 Microswitch brew unit present 3 Microswitch top position control (home position) 4 Microswitch bottom position control (compressing and drain position) Figure 4-2: CVA4070 Brew Unit The brew unit is controlled by 4 microswitches (Figure 4-2).
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.3.2 Brew Unit Present Control If the brew unit is seated, the microswitch brew unit present switches (Figure 4-2, Item 2) will be activated. 4.3.3 Electronic Grinding Amount Compensation The grinding amount compensation balances out different grinder settings and coffee types. The grinding amount can be programmed for the various coffee types (coffee, espresso, cappuccino) in the customer programming mode. The available range is Step 0 to 17.
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CVA4070 / CVA4075 Coffee Systems Technical Information During the brewing process, the cams of the brew unit move past the microswitch. (Figure 4-3, Item 2). The farther the cams move, the more ground coffee is in the brew unit.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1, 2, 3 Volume areas 1, 2 and 3 Figure 4-5: CVA4070 Ground Coffee Volume The ground coffee amount can be measured in three volume areas (Figure 4-4), which correspond to the volume areas at the appliance (Figure 4-5). If the ground coffee amount deviates from the set amount, then in the next grinding step the grinding time is extended by approx. 0.2 s, or shortened by approx. 0.2 s, as needed. Since the maximum time for compensation is ± 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information Pawl Figure 4-7: CVA4070 Front View. If the brew unit is in the home position, the left cam of the double cam element activates the top microswitch; the bottom microswitch is not switched (Figure 4-6). The pawl is in the home position (Figure 4-7).
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.3.5 Brew Unit Drive, Compressing Position (Brew Position) Figure 4-8: CVA4070 Rear View Pawl Figure 4-9: CVA4070 Front View The drive moves until the second cam of the double cam element switches the bottom microswitch, and the top microswitch is no longer switched (Figure 4-8). The pawl presses down on the spring (Figure 4-9) and closes the drain valve. The ground coffee is slightly compressed and brewed.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.3.6 Brew Unit Drive, Drain Position Figure 4-10: CVA4070 Rear View Figure 4-11: CVA4070 Front View After the coffee is brewed, the drive moves back until the first cam of the double cam element activates the bottom microswitch and the top microswitch is switched (Figure 4-10). The tension of the spring is released, the drain valve is opened, and the residual water runs into the drip tray before the coffee puck is dropped.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.4 Water Paths 4.4.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.4.2 Water Path – Making Coffee 1 Waste container 3 Water tank reed switch 4 Water tank 8 Flow meter 9 Coffee/hot water pump 10 Flow-thru heater coffee/hot water 11 Pressure relief valve 13 Drain valve 14 Brew unit 17 Coffee dispenser 18 Drip tray Figure 4-13: CVA4070 Coffee Water Path View When “coffee”, or “espresso” is selected, the coffee/hot water pumps draws water from the water tank, via the flow meter.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.4.3 Water Path – Hot Water 3 Water tank reed switch 4 Water tank 8 Flow meter 9 Coffee/hot water pump 10 Flow-thru heater coffee/hot water 11 Pressure relief valve 12 Hot water solenoid 16 Hot water dispenser 18 Drip tray Figure 4-14: CVA4070 Hot Water Path View When “hot water” is selected, the coffee/hot water pump draws water from the water tank, via the flow meter. The water is then pumped through the flow-thru heater coffee/hot water.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.4.4 Water Path – Steam 2 Cappuccinatore 3 Water tank reed switch 4 Water tank 5 Pressure relief valve 6 Steam pump 7 Flow-thru heater steam 15 Steam solenoid 18 Drip tray Figure 4-15: CVA4070 Steam Water Path View When “cappuccino” or “milk froth” is selected, the steam pump draws water from the water tank. The water is then pumped through the flowthru heater steam. If there is excess pressure, the pressure relief valve opens.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.0 Service 5.1 Appliance – Remove from Cabinet 1. Open the door of the unit. 2. Empty containers and the drip tray. 1. Appliance retaining screws Figure 5-1: CVA4070 Service View 3. Remove the screws (Figure 5-1, Item 1). 4. Pull the appliance out of the cabinet. 5. Disconnect the unit from power.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.2 Door Lamps – Remove 1. Open the door of the unit. 1 Retaining screws of cover Figure 5-2: CVA4070 Door Lamp Screw Removal 2. Remove the screws (Figure 5-2, Item 1). 3. Remove the cover.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-3: CVA4070 Door Lamp Removal 3. Unclip the lamps and remove them (Figure 5-3).
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.3 Door – Remove 1. Open the door of the unit. 1 Retaining screws right panel Figure 5-4: CVA4070 Door Screw Removal 2. Remove the screws on the right panel (Figure 5-4, Item1). 3. Remove the right panel.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-5: CVA4070 Door Retaining Screw Removal 4. Unplug the connecting plug at the power electronic. 5. Remove the door retaining screws: • Disconnect the plug to the power electronic (Figure 5-5, Item 1). • Release the teflon hoses from their connector and pull out (Figure 5-5, Item 2). Note The teflon hoses are colored differently, to prevent crossing the lines during reassembling. • • Remove the screws of the door hinges (Figure 5-5, Item 2).
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.4 Hot Water Dispenser – Remove 1. Open the door of the unit. 1 Retaining screws of cover Figure 5-6: CVA4070 Hot Water Removal 2. Remove the screws of the cover (Figure 5-6, Item1). 3. Remove the cover.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Retaining screws of bracket Figure 5-7: CVA4070 Hot Water Retaining Screw Removal 4. Release the teflon hose from its connection and pull it out (Figure 5-7). 5. Remove the screws of the bracket (Figure 5-7, Item1). 6. Remove the bracket (Figure 5-7). 7. Pull the hot water dispenser downward and remove it.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.5 Cappuccinatore – Remove 1. Open the door of the unit. 1 Retaining screws of cover Figure 5-8: CVA4070 Cappuccinatore Screw Removal 2. Remove the screws of the cover (Figure 5-8). 3. Remove the cover.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Retaining screws of bracket Figure 5-9: CVA4070 Cappuccinatore Retaining Screw Removal 4. Release the teflon hose from its connection and pull it out (020 Fig. 6). 5. Remove the screws of the bracket (Figure 5-9, Item1). 6. Remove the bracket. 7. Pull the Cappuccinatore downward and remove it.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.6 Brew Unit Drive – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the retaining screws of the appliance lid. 3. Take the lid off. 1 Service door retaining screws Figure 5-10: CVA4070 Brew Drive Screw Removal 4. Remove the retaining screws of the service door (Figure 10, Item 1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Microswitch grinding amount compensation 2 Brew unit drive Figure 5-11: CVA4070 Brew Unit Drive Removal 7. Disconnect the plug of the brew unit drive (Figure 5-11, Item 2). 8. Disconnect the plug (ST4) from the power electronic. 9. Open the door of the unit. 10. Take the containers out of the appliance.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-12: CVA4070 Brew Unit Removal 11. Release the brew unit and take it out of the appliance (Figure 5-12).
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Brew unit drive retaining screws Figure 5-13: CVA4070 Brew Unit Retaining Screw Removal 12. Remove the brew unit drive retaining screws (Figure 5-13, Item 1). 13. Take the brew unit drive out toward the rear. Note When installing the brew unit drive, make sure that the pawl is set in the home position, refer to Figure 6-1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.7 Microswitch Grinding Amount Compensation – Remove 1. Appliance – Remove from cabinet”, (figure 5-1). 2. Remove the retaining screws of the appliance cover. 3. Remove the cover. 1 Service door retaining screws Figure 5-14: CVA4070 Service Door Retaining Screw Removal 4. Remove the service door screws (Figure 5-14, Item 1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Microswitch grinding amount compensation 2 Brew unit drive Figure 5-15: CVA4070 Microswitch Removal 7. Disconnect the plug from the microswitch (Figure 5-15, Item 1). 8. Unclip the microswitch and take it out.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.8 Grinder – Remove 1. Appliance – Remove from cabinet ( Figure 5.1). 2. Remove the retaining screws of the appliance lid. 3. Remove the lid. 1 Service door retaining screws Figure 5-16: CVA4070 Grinder Screw Removal 4. Remove the service door retaining screws (Figure 5-16). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-17: CVA4070 Grinder Unit Removal 7. Take the bean container out.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Retaining screws of the bean container base Figure 5-18: CVA4070 Bean Container Screw Removal 8. Remove the retaining screws of the base (Figure 5-18, Item1).
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-19: CVA4070 Bean Container Removal 9. Pull the handle off the adjustment lever (Figure 5-19). 10. Take the base out.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Grinder retaining screws Figure 5-20: CVA4070 Grinder Retaining Screws Removal 11. Slide the adjustment lever aside (Figure 5-20). 12. Remove the grinder retaining screws (Figure 5-20, Item1). 13. Take the grinder out. 14. Pull the connecting plug off the grinder.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.9 Hot water Solenoid – Remove 1 Retaining screws of support plate Figure 5-20: CVA4070 Grinder Retaining Screws Removal 1. Remove the screws of the support plate (Figure 5-20, Item 1). 2. Open the support plate.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Steam solenoid 2 Hot water solenoid Figure 5-21: CVA4070 Solenoid Removal 62
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-22: CVA4070 Solenoid Removal 3. Pull out the safety springs at the connection of the hot water solenoid (Figure 5-22). 4. Take the solenoid out. 5. Pull the connecting plug off the solenoid. Warning! To prevent malfunctions in the water system (for example clogging of the valves), never use grease, oil or other lubricants when assembling the water supplying components.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.10 Steam Solenoid – Remove 1 Retaining screws of support plate Figure 5-23: CVA4070 Solenoid Screw Removal 1. Remove the screws of the support plate (Figure 5-23, Item1). 2. Open the support plate.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Steam solenoid 2 Hot water solenoid Figure 5-24: CVA4070 Solenoid Removal 65
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-25: CVA4070 Solenoid Removal 3. Pull out the safety springs at the connection of the steam solenoid (Figure 5-25). 4. Remove the solenoid. 5. Pull the connecting plug off the solenoid. Warning! To prevent malfunctions in the water system (for example clogging of the valves), never use grease, oil or other lubricants when assembling the water supplying components.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.11 Flow-thru Heater Coffee/Hot Water – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the cover retaining screws. 3. Remove the cover. 1 Service door retaining screws Figure 5-26: CVA4070 Rear Screw Removal 4. Remove the service door screws (Figure 5-26, Item1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Flow-thru heater steam 2 Flow-thru heater coffee/hot water Figure 5-27: CVA4070 Flow-thru Heater 7. Remove the rear wall retaining screws at the bottom. 8. Take off the lower rear wall.
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CVA4070 / CVA4075 Coffee Systems Technical Information 9. Pull out the spring clips at the water connection (Figure 5-28). 10. Remove the mounting platform, shelf screws of the flow-thru heater (Figure 5-28, Item. 1). 11. Remove the flow-thru heater. 1 Temperature limiter 2 Temperature fuse 3 Temperature sensor Figure 5-29: CVA4070 Flow-thru Heater Temperature 12. Remove the temperature sensor, temperature limiter and temperature fuse from the flow-thru heater (Figure 5-29, Items 1 – 3). 13.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.12 Flow-thru Heater Steam – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the retaining screws of the appliance cover. 3. Remove the cover. 1 Service door retaining screws Figure 5-30: CVA4070 Rear Service Door Retaining Screw Removal 4. Remove the service door retaining screws (Figure 30, Item1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Flow-thru heater steam 2 Flow-thru heater coffee/hot water Figure 5-31: CVA4070 Flow-thru Heater Steam 1 Retaining screws flow-thru heater Figure 5-32: CVA4070 Flow-thru Heater Steam 71
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CVA4070 / CVA4075 Coffee Systems Technical Information 7. Pull out the spring clips at the connection (Figure 32). 8. Remove the flow-thru heater mounting screws (Figure 32, Item 1). 9. S/B Remove center screw. 10. Remove the flow-thru heater. 1 Temperature limiter 2 Temperature sensor 3 Temperature fuse Figure 5-33: CVA4070 Temperature 10. Remove the temperature limiter, temperature sensor and temperature fuse (Figure 5-33, Items 1 – 3). 11. Pull the connectors off the flow-thru heater.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.13 Coffee/Hot Water Pump – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the cover retaining screws. 3. Remove the cover. 1 Service door retaining screws Figure 5-34: CVA4070 Rear Service Door Screw Removal 4. Remove the service door retaining screws (Figure 5-34, Item 1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-35: CVA4070 With Service Door Open 7. Remove the rear wall retaining screws at the bottom. 8. Remove the lower wall.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Coffee/hot water pump 2 Steam pump Figure 5-36: CVA4070 Coffee/Hot Water Pump 75
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Safety valve 2 Pump retaining screws 3 Temperature limiter Figure 5-37: CVA4070 Coffee/Hot Water Pump Removal 9. Release the teflon hose from the safety valve and disconnect it (Figure 5-37, Item 1). 10. Pull the connectors off the pump. 11. Remove the pump retaining screws (Figure 5-37, Item 2). 12. Remove the pump. 13. Pull the silicone hose off the pump (Figure 5-37). 14. Unclip the temperature limiter and remove it (Figure 5-37, Item 3). 15.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.14 Steam Pump – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the cover retaining screws. 3. Remove the cover. 1 Service door retaining screws. Figure 5-38: CVA4070 Service Door Steam Pump Removal 4. Remove the service door retaining screws (Figure 5-38, Item 1). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-39: CVA4070 Steam Pump Removal 7. Remove the rear wall retaining screws at the bottom. 8. Remove the lower wall.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Coffee/hot water pump 2 Steam pump Figure 5-40: CVA4070 Coffee/Hot Water Pump Removal 79
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Pump retaining screws 2 Temperature limiter Figure 5-41: CVA4070 Pump Retaining Screws Removal 9. Pull the connectors off the pump. 10. Remove the pump bracket retaining screws (Figure 5-41, Item 1). 11. Remove the pump. 12. Remove the retaining clip from the 90 ° connector and disconnect the teflon hose (Figure 5-41). 13. Pull the silicone hose off the pump (Figure 5-41). 14. Unclip the temperature limiter and remove it (Figure 5-41, Item 2). 15.
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.15 Flow Meter – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the cover retaining screws. 3. Remove the cover. 1 Service door retaining screws. Figure 5-42: CVA4070 Flow Meter Screws Removal 4. Remove the service door retaining screws (Figure 5-42). 5. Take the cable connecting the control and the power electronic out of its guide. 6. Open the service door.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-43: CVA4070 Flow Meter Removal 7. Remove the rear wall retaining screws at the bottom. 8. Remove the lower wall.
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Flow meter Figure 5-44: CVA4070 Flow Meter Removal 83
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 Flow meter 2 Safety ring Figure 5-45: CVA4070 Flow Meter Safety Ring Removal 9. Pull the silicone hoses off the flow meter (Figure 5-45). 10. Pull the connector off the flow meter. 11. Pull the flow meter upward out of the safety ring and remove it (Figure 5-45, Item 2).
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CVA4070 / CVA4075 Coffee Systems Technical Information 5.15 Power Electronic EPL – Remove 1. Appliance – Remove from cabinet”, (Figure 5-1). 2. Remove the rear wall retaining screws at the top. 3. Remove the top rear wall. 1 Power electronic retaining screws Figure 5-46: CVA4070 Power Electronic Retaining Screws Removal 4. Remove the screws of the power electronic (Figure 5-46, Item 1). 5. Remove the power electronic. 6. Pull the connectors off the power electronic.
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CVA4070 / CVA4075 Coffee Systems Technical Information Figure 5-47: CVA4070 Connecting Plugs and Pin Allocations. Plug # Pins Usage / Component 1 ST1 2 vacant (solenoid for hard plumbing) 3 1 ST2 2 3 Steam solenoid Hot water solenoid 4 1 Reed contact ground coffee funnel 2 Table 5-1: CVA4070 Connecting Plugs and Pin Allocations (Cont.
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CVA4070 / CVA4075 Coffee Systems Technical Information Plug # Pins 3 4 5 6 7 8 ST4 Transmitter for electronic light barrier bean container Receiver for electronic light barrier bean container Microswitch brew unit 1 compensation 2 Microswitch brew unit 2 clockwise turn 3 Microswitch brew unit 3 counter-clockwise turn 4 Microswitch brew unit 4 present 5 Microswitch brew unit XXXXMasse 2 3 4 5 6 ST6 Reed contact waste container 1 1 ST5 Usage / Component 1 2 Reed contact water tank fill Ree
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CVA4070 / CVA4075 Coffee Systems Technical Information 1 ST8 2 3 4 1 LED interior lamp 2 3 Temperature sensor NTC coffee/hot water 4 ST9 5 Temperature sensor NTC steam 6 7 8 Flow meter 9 1 ST10 2 3 ST11 ST12 1 Connector to main power supply 2 Connection to Plug 12 1 Flow-thru heater steam 2 vacant 3 Flow-thru heater coffee/hot water 4 vacant 5 Connection to plug 11 6 Interference suppressor 7 Pump coffee/hot water 8 Steam pump 9 vacant 10 11 ST13 1 2 Grinder motor Conne
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.0 Fault Diagnosis 6.1 Programming Mode Initial requirements 1. Switch the appliance off. Accessing Note Access has to be completed within 10 seconds. 2. 3. 4. 5. Touch pad Clear and hold it. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Setting Function No Back, without Reset yes All settings made by the customer (except language) are deleted. All own user profiles are deleted. The fault code memory remains. Reset cestina dansk deutsch english espanol Factory Setting - The language remains, even when the program is reset to factory setting. If the language setting is wrong, use the bilder\t4640s02.tif icon as a guide to the language menu.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Setting Start at e. g. 7:30 Switch e. g. 0:15 off after Set Function Factory Setting Use the pads +/– to set the desired time. - Switch e. g. 9:00 off after Settings Timer Switch on at Active e. g. 7:30 e. g. 9:00 Switch off at Step 1 – Espresso 17 Settings Settings Grinding Amount The unit is switched on at the specified time. The unit is switched off at the specified time. Grinding Time 3.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Settings Temperature Settings Coffee Function Factory Setting Minimum = 205 °F (96 °C) (in the flow-thru heater) Low = 208 °F (98 °C) (in the flow-thru heater) Medium = 212 °F (100 °C) (in Medium the flow-thru heater) High = 215 °F (102 °C) (in the flow-thru heater) Maximum = 219 °F (104 °C) (in the flow-thru heater) Minimum = 205 °F (96 °C) (in the flow-thru heater) Low = 208 °F (98 °C) (in the flow-thru heater) Settings Tem
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Settings Settings The steam system is switched on. Off The steam system is switched off. On The lamps of the door and the interior are switched on. Off The lamps of the door and the interior are switched off. step 1 – 17 The lamps of the appliance interior can be dimmed. Step 17 step 1 – Bottom 17 The lamps of the appliance door can be dimmed. Step 17 e. g.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Settings Select Create Settings User Profile Function Factory Setting Standard The main menu contains a standard user profile: The settings for the grinding amount, temperature, prebrewing and portion size correspond to the factory setting. Up to 7 own user profiles The selected user profile is indicated in the main menu.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Settings Settings Settings Step 1 – 16 Low to High Step 8 Brightness Step 1 – 16 Dim to Bright Step 14 Volume Step 1 18 Low to High On Touch pads emit a tone when they are touched. Touch Pad Tones Off Touch pads do not emit a tone when they are touched. All settings made by the customer (except language) are reset to factory setting.
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CVA4070 / CVA4075 Coffee Systems Technical Information Position Settings Available Customer Appliance Service Variant Hard plumbing Release Descale Function The appliance is hooked-up to plumbing. Not Available The appliance cannot be hookedup to plumbing. No Back, without lifting the descale lock. Yes Release the descale lock. *1 No Back, without lifting the cleaning lock. Release Cleaning Yes Factory Setting Not Available Release the cleaning lock.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.1 Reset Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch the pad next to Reset. No: Back, without Reset.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.2 Language – Set Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Language. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.3 Time – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Time. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.4 Timer – Set / Activate Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Clock Timer. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 4.1.5 Grinding Amount – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Grinding amount. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.6 Pre-brewing – Set Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Pre-brewing. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.7 Temperatures for Coffee and Hot Water – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator 1. The display shows the positions of the programming mode Programming. Options 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information Hot water: minimum: Represents 96 °C (in the flow-thru heater). low: Represents 98 °C (in the flow-thru heater). medium: Represents 100 °C (in the flow-thru heater). high: Represents 102 °C (in the flow-thru heater). maximum: Represents 104 °C (in the flow-thru heater). Factory setting: medium. Save and quit 1. Save and back: Touch pad next to OK. 2. End: Touch pad On/Off. Quit (without saving) 1. Touch pad On/Off.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.8 Automatic Rinse – On / Off Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Rinse automatic. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.9 Steam System – On / Off Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 2. 3. 4. 5. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Steam system. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.10 Door and Interior Lighting – Set Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Lighting. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.11 Coffee Count – Indicate Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to coffee total. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.12 System Lock – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to System lock. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.13 Water Hardness – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Water hardness. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.14 User Profile – Set Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to User profile. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information after dispensing: After each time a beverage is dispensed, the main menu changes to a standard user profile. Factory setting: never. Save and quit Save and back: Touch pad next to OK. End: Touch pad On/Off. Quit (without saving) Touch pad On/Off.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.15 Display – Set Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Display. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.16 Signal Tones – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Signal tones. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.17 Factory Setting – Restore Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Factory setting. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.18 Restart Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Customer service. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.19 Appliance Variant – Set Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Customer service. 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.20 Descale Lock – Reset Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options Touch pad next to Reset descale.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.1.21 Cleaning Lock – Reset Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 5 times and at the 5th time, hold it until the programming mode appears. Acknowledgement indicator The display shows the positions of the programming mode Programming. Options 1. Touch pad next to Reset cleaning.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.2 Service Mode Overview Initial requirements 1. Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 3 times and at the 3rd time, hold it until the service mode appears. Acknowledgement indicator The display shows the positions of the Service mode. Options 1. Touch the pad next to the desired position (refer). 2.
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CVA4070 / CVA4075 Coffee Systems Technical Information Display / Activation Position Open COMPONENT HOT WATER TEST VALVE Close initialize COMPONENT BREW UNIT move counterTEST clockwise for given period of time Description / Results The solenoid for hot water is opened. The solenoid for hot water is closed. The micro switches are tested, and the brew unit is returned to its home position. To prevent mechanical damage, as a final step, always activate intializing.
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CVA4070 / CVA4075 Coffee Systems Technical Information Display / Activation Position FLOW–THU COMPONENT HEATER TEST WATER FLOW– THRU COMPONENT HEATER TEST STEAM DISH WARMING COMPONENT DRAWER TEST N/A US models WATER COMPONENT SUPPLY TEST VALVE 1 COMPONENT WATER SUPPLY TEST VALVE 2 COMPONENT WATER SUPPLY TEST VALVE 1+2 DRIP TRAY SENSOR TEST SENSOR TEST SENSOR TEST On The flow-thru heater coffee/hot water heats. The temperature indication on the heater goes increases.
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CVA4070 / CVA4075 Coffee Systems Technical Information Display / Activation Position closed SENSOR TEST BREW UNIT 2 SENSOR TEST BREW UNIT closed 3 open open SENSOR TEST BREW UNIT closed 4 open SENSOR TEST GROUND COFFEE FUNNEL SENSOR TEST SENSOR TEST SENSOR TEST WATER TANK The microswitch top position control is activated. The microswitch top position control is not activated. The microswitch bottom position control is activated. The microswitch bottom position control is not activated.
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CVA4070 / CVA4075 Coffee Systems Technical Information Display / Activation Position OPERATING HOURS Description / Results FLOW–THRU HEATER WATER Operating hours of the flow-thru heater coffee/hot water. FLOW–THRU HEATER STEAM Operating hours of the flow-thru heater steam. ESPRESSOS DISPENSED Number of espressos dispensed. DOUBLE ESPRESSOS DISPENSED Number of double espressos dispensed COFFEES DISPENSED Number of coffees dispensed. DOUBLE COFFEES Number of double coffees DISPENSED dispensed.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.3 Fault Codes – Read, Save and Delete 6.3.1 Fault Code Accessing Initial requirements Switch the appliance off. Accessing Note Complete the access within 10 seconds. 1. 2. 3. 4. Touch pad Clear and hold. Touch pad On/Off once. Release pad Clear. Touch pad Clear 3 times and at the 3rd time, hold it until the service mode appears. Acknowledgement indicator The display shows the positions of the Service mode. Options 1.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.3.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.3.3 F1 Short circuit in the temperature sensor NTC coffee/hot water • • • • 6.3.4 Check the connecting cables. Replace the connecting cables if necessary. Temperature sensor Flow-thru heater coffee/hot water– Check, 0214.46. Check the temperature sensor. F2 Open circuit temperature sensor NTC coffee/hot water • • • • 6.3.5 Check the connecting cables. Replace the connecting cables if necessary.
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CVA4070 / CVA4075 Coffee Systems Technical Information Water tank valve jammed, clogged. • • Check the water tank valve. Replace the water tank if necessary. Flow meter defective. • • Flow meter – Remove Install a new flow meter. Pump coffee/hot water defective. • • 6.3.8 Coffee/hot water pump – Remove Install a new pump coffee/hot water. F17 – Insufficient Water Supply The water tank is not seated correctly. • Push the water tank in correctly. Hoses broken, clogged, kinked. • • Check the hoses.
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CVA4070 / CVA4075 Coffee Systems Technical Information 6.3.9 F41 Faulty EEPROM/Wrong data • • 6.3.10 Control electronic EPX – Remove Install a new control electronic. F42 Main power frequency not registered • 6.3.11 Verify correct source voltage & frequency. F47 Faulty interface of control electronic and power electronic. • • 6.3.12 Check the cable between control electronic and power electronic. Replace the connecting cable if necessary.
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CVA4070 / CVA4075 Coffee Systems Technical Information Defective microswitch or no continuity in connectors. • • • • Check the connecting cables. Replace the connecting cables as necessary. Position control microswitch– Check Replace the microswitch if necessary. Brew unit drive defective. Note When installing the brew unit, make sure that the pawl is set to the home position, refer to Figure 6-1. Brew unit drive, home position. • 6.3.13 Install a new brew unit drive.
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CVA4070 / CVA4075 Coffee Systems Technical Information • 6.3.15 Replace the temperature fuse. F82 The temperature is higher than 266°F(130 °C). • 6.3.16 If the temperature fuse has tripped it has to here placed. F83 The temperature is higher than 356°F(180 °C). • If the temperature fuse has tripped, it has to here placed. Date: September 8,2006 LG.