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Wiring diagram for miele cva 4075 - Miele Coffee Makers & Espresso Machines

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  • Luigi Marazzi
    Luigi Marazzi Feb 14, 2018

    Hello Mark
    thank you for taking the time, your answer and links. it is very much appreciated.
    We installed the unit in 2007 and have made on average 8 cups a day. clean it descale it as indicated.
    The unit required one service call when new and nothing since. Of late it has stopped grinding coffee, grinder would spin but no coffee ground. Upon dismantling the unit, the grinder and chute were found to be blocked with hardened coffee ground. The grind unit and machine have been thoroughly cleaned and reassembled, save the connections to the grinder motor, a red power wire with a female spade connector and a thinner white signal wire with a smaller male spade connector. I cannot find vacant slots to connect to. I need a wiring diagram, but have not been able to
    find one anywhere. Cleary I did not make a note or take a picture, it seemed so obvious at the time..

  • Terry
    Terry Feb 14, 2018

    Additional information for this model:
    http://www.cagrimmett.com/justanswer/cva...

  • Luigi Marazzi
    Luigi Marazzi Feb 14, 2018

    Terry, I do have that manual, unfortunately, it does not include a wiring diagram. thank you

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  • Miele Master
  • 739 Answers

First, I'm not a Miele tech. I recommend contacting your vendor or the MFR for support. Check your warranty.
*** the following is for information only ***
* I've worked on table top "Super Automatic" brewers and not a fan of these small units. Similar to the larger Supers, these are the home/office style units. But all have the same problems as the larger professional units. They all require daily maintenance to be performed in order to maintain it. The reason is that these Super Automatics try to replace a Barista. It takes time, training, and lots of practice to become a good Barista. But now with a touch of a button, this 'Robotic machine' will make your favorite Latte for you. But you must keep this robot clean and serviced in order to keep producing coffee (especially milk products like Latte's)
* If you haven't opened up the machine, here is a link;
https://www.bing.com/videos/search?q=for+miele+cva+4075&&view=detail&mid=B3EFF641EE5260CB49EBB3EFF641EE5260CB49EB&&FORM=VRDGAR
* following this link will also get related vids that may take you to the section your looking for. Be aware that the most likely cause of a problem is coffee grounds, water spills, and old milk getting in the wrong place and needs to be removed to function correctly.
* There are 2 basic systems in the machine for the water portion: Main heater for coffee brewing and steamer heater for the steam wand.
* Whole bean system has; Hopper, Grinder, Volume doser and/or timer.
* Group system compresses the coffee, doses a volume of hot water, then disposes the dregs or 'puck' This is usually a mechanical system with motor and gears.
* There may be an additional steam heater system if there is a Coco/hot chocolate option.
* All Heater systems have a pump (usually vibration), Heater, Thermostat(disk), Thermo fuse.
* Super Automatics always have a digital component to them. Many have options that require not only the correct PC board but also the correct PROM installed (internal programing). Most MFR's will only provide the block diagram of a unit with only a layout of where the cables attach to the PC board.
* Table units have many more sensors than their larger brothers which only check on water temps and how many pucks in the dregs drawer. Table units check the bean level, ground coffee, water level, water temps, group compression(by position), dregs level, panel doors, drip tray present, milk temp(an option), and others that may be on the CPU board as a time out or current usage. Some sensors are physical like a temp probe or a simple micro switch which are easy to find and locate by following the wires. The PC board is another mater. I suspect the MFR has a plug in unit that tests all the functions. I've used another 'good working' unit to swap test the PC boards and plug in parts. But found that PC boards have PROMs that differ from date of MFR and version. So a board may work in one version but not in another.
* Check out the you tube vids as many have come across the common problems. You will note that most are related to cleaning (or the absence) the machine. The other problem is "Opps" and walking away. People will pour stuff into the machine thinking "I thought that's where the milk goes?" or "I wanted a coco, not coffee."
* Air bubbles in the water line(s) from not re-filling the water tank. May require removing the water hose to the pump or detaching the pump from the heater to allow water to flush out the air. Restarting the machine several times may push out the air.
* Final, call vendor for help and service (if available). When I worked on these machines., these units had been swapped out by the seller whom replaced them with newer units to satisfy the customer (Hotel). The seller asked an espresso service company (us) to take a look at them figuring it's cheaper than sending them back to the mainland USA (I'm in Hawaii). So your getting the idea how hard it is to service these units.
* Once operational. Follow the daily maintenance. (and keep a look out for "Opps" people.
Aloha, ukeboy57

Posted on Feb 14, 2018

  • Mark Cheong
    Mark Cheong Feb 19, 2018

    Luigi just replied with additional information. Clogged with coffee 'fines' (dust) and had to take apart wires to grinder motor. Unable to find where they go. This happens to me all the time. When I don't have a diagram, the next best thing is to assume your the factory worker that has to put it together. How would you lay down the wires so they don't get in the way. They must also reach the location of the plug or connection. Try to lay down the wire in various positions and see if there is a connection point nearby. Another clue is the type of connection. Does it fit? These machines usually use a DC low voltage motor so crossing the wires will show up as a reversed grind. Though you could probably just check with a voltmeter to tell which is + or - An AC motor would not matter. The control/sensor wires are usually very thin wires where as the motor wires will be a heavy gauge or thicker wire with heavy insulation. Final; 2007? wow, your lucky to have this unit running at all. Most of these mini machines last 2-3 years at the most. Ceramic burrs, plastic parts, tiny heating chambers. tend to wear out quickly. So you must be doing something right. If this unit is still running, then I suggest you keep it up but double up on your maintenance frequency. Daily flushing on last brew goes a long way. Frequent checks for accumilation of 'Dust Plugs' and loose dregs will keep the inner works free of debris. There are a lot of vids on how to clean and lubricate, which should be done frequently (monthly). Aloha, ukeboy57

  • Luigi Marazzi
    Luigi Marazzi Feb 20, 2018

    Hi Mike
    I was able to source a wiring diagram from another source, Miele was no help in that regard. The unit was dismantled cleaned and now all good thank you for your input and follow up
    Best
    Luigi

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SOURCE: Miele CVA 4075 brew unit locked

Turn your machine off. Close the door. Depress <clear>, holding it down, press <on/off> then let go of both. Then press <clear> 3 times. On 3rd time, hold it until Service menu appears. Select <brew unit> then press left arrow to turn from <off> to <on>. Then press right arrow by <select> This will turn your brew unit drive to the correct position and you should be able to get your brew unit in/out and your waste container back in. Make sure to turn your machine off/on again to get out of Service Menu. I have a picture of how the wire needs to be inserted to get that back on. It's definitely not intuitive, but send another note with your email address and I can send the pics.

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t0ny_pars0ns
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SOURCE: miele cva 4075

Please advice as to the make and model of this camera. Thank you.

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