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Bezzera Minibar issues

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  • aregev
    replied
    Thanks for the electric design, I will try to figure it out. I own the Minibar for 12 years, the only changes could be on the controller wiring - see attached picture.
    So far it looks fine but will check it again.
    Appreciate if you could look on the picture and let me know if you see any wrong wiring. Thanks, aregev
    If you can't see the picture you can go to http://docs.google.com/open?id=0B_rW...HJxRFdKNWd0UGs

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  • Dimal
    replied
    Here you go...

    Mal.
    Attached Files

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  • coffee_machinist
    replied
    Hi again,

    I still think the board is fine, it's just not wired correctly. My guess would be that someone has mixed up the pump and the heater connections.

    So the machine is doing this:

    All probes grounded, thus heating should commence - control board runs the pump, but fill solenoid closed and heater off

    Safety probe and water level probe grounded, but fill probe open - control board runs the element and fill solenoid, but not the pump.

    ...make sense?


    *Please note this is just a guess, I don't have a wiring diagram for the BZ35/Minibar, I don't know the history of your particular machine, and your use of the above information is at your own risk. Please take great care when making connections at the control board and never do so under live conditions. If in doubt, refer the machine to a professional.
    Last edited by coffee_machinist; 5 November 2012, 10:55 AM. Reason: added caveat

    Leave a comment:


  • aregev
    replied
    I did some more testings:
    When disconnecting only the long probe (wired green) that connected to FA9 on the controller everything stopped.
    When disconnecting the short probe (wired green/black) connected to FA8 on the controller and water container is full (or touch the water probe on body) then the water starting to flow and the heater is starting.
    That mean something is wrong with controller interpretation what to do when the boiler is full.
    Hope this provide more information on the problem. Thanks

    Leave a comment:


  • aregev
    replied
    Thanks. Yes 100% the boiler is full. The probes board has no burns on it - however it does not functioning as well for the water level at the water container.
    Can you refer me to a control board wiring and a test procedure? Thanks

    Leave a comment:


  • coffee_machinist
    replied
    If you're 100% sure the boiler is full, you can ground out the boiler fill probe to see if it starts heating. To be honest though, it sounds like the control board is not correctly wired.

    Leave a comment:


  • aregev
    replied
    I have same Minibar which recently had to repair the boiler after a technician brake it. Currently the boiler is installed and clean almost like new.
    The issue I have is the back solenoid opens for a sec and disconnect not enabling to fill the boiler.
    I have tested the pump, the solenoid, the heater and the relay - all good.
    When start the machine the pump is running non-stop, heater is not starting - filled the boiler manually.
    Any recommendations? Thanks.

    Leave a comment:


  • Dimal
    replied
    Re: Bezzera Minibar issues

    Originally posted by 210E0705122D010E0107050D050E14600 link=1282298491/24#24 date=1301617276
    it becomes harder to find parts and work with Surface Mount.
    Work-arounds for alternative parts can often be accommodated and I think this board is a little retro for SMDs....

    Mal.

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  • A_M
    replied
    Re: Bezzera Minibar issues

    Originally posted by 664B4F434E220 link=1282298491/23#23 date=1301580533
    Any genuine electronics tech should be able to repair this for you. They are really quite simple.....

    Mal.
    And there in is the issue these days as more and more are either in Design OR Board jocks as it becomes harder to find parts and work with Surface Mount.

    Such is life...

    Now where was that black smith as I need a new carving knife ? Opps IKEA ;D

    Leave a comment:


  • Dimal
    replied
    Re: Bezzera Minibar issues

    Any genuine electronics tech should be able to repair this for you. They are really quite simple.....

    Mal.

    Leave a comment:


  • koendileoni
    replied
    Re: Bezzera Minibar issues

    as you can see i decided to try to solve it myself, a new box costs a lot of money, lets try this first!

    I really need the adres of the guy who repairs these things...

    Leave a comment:


  • koendileoni
    replied
    Re: Bezzera Minibar issues

    front

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  • koendileoni
    replied
    Re: Bezzera Minibar issues

    HI all,

    i try again to show the pictures of the blackbox. hope it can be repaired.

    Leave a comment:


  • koendileoni
    replied
    Re: Bezzera Minibar issues

    indeed interesting, well ill send it to repairs. Thank you all for the tips and tricks.!!!

    Leave a comment:


  • A_M
    replied
    Re: Bezzera Minibar issues

    Originally posted by 52565C575D50555C565750390 link=1282298491/17#17 date=1282739112
    I live in utrecht. The netherlands.  know a very well renomated coffee repair shop, which also sells machines and coffee. I always buy my coffee there. but any good suggestions are welcome.
    Interesting... Know a few people out that way But all IT based :-[

    Leave a comment:

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