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Thread: Expobar Office problem

  1. #1
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    Unhappy Expobar Office problem

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have an Expobar Office which is about 2 years old
    which has been virtually problem free up till now except for a sticking valve I fixed
    about 6 months ago.
    Now the coffee machine is not pumping water I have also had once before the switch
    that turns off the machine when the water runs low in the resevoir stop working possibly
    due to getting water in it from drips while filling the resevoir, This switch seems to be playing up
    again. Has anyone else had this problem with an Expobar Office & is there anything else that may need fixing?
    The machine seems to make the pumping sound but now no water is being pumped through for the pour or through
    the milk frother nozzle. Can anyone suggest the best place to buy parts for this machine? Any help would be most appreciated

  2. #2
    Senior Member sprezzatura's Avatar
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    When you engage the pump does the drip tray fill with water? Does the reservoir drain at all?

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    Re Office

    Quote Originally Posted by sprezzatura View Post
    When you engage the pump does the drip tray fill with water? Does the reservoir drain at all?
    No not when I had this problem. The switch at the bottom of the resevoir maybe gets some water in it while I fill the resevoir if some water gets spilled
    I am guessing I will get a small funnel to avoid this. When this happens from time to time the machine buzzes but doesn't really do anything like its not making
    a proper electrical connection to start the pump pumping. when I take the switch out of the machine and manually work it while spraying WD40 into it & then
    leave it upside down if it has taken in some water. I can usually get it to work again. I am going to buy a new switch but haven't been able to locate who sells them yet.
    This time was a bit different as the pump was not stopping & I since found out there was air in the lines. eventually it worked again & worked till yesterday when the
    switch played up again & when I got it working again this morning it seemed to to prime itself once but then only poured about a 20ml shot & it wont pump anything through
    the group head now or the steam wand or the hot water tap so I assume that either there is air in the system and the boiler needs priming or the pump needs cleaning or replacing
    but most likely the former.

  4. #4
    TC
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    Quote Originally Posted by muso44 View Post
    The switch at the bottom of the resevoir maybe gets some water in it while I fill the resevoir if some water gets spilled...
    This is not a good thing to do and I'd strongly recommend against it.

    Firstly, 230V and water are not happy bed partners. You are lucky you haven't tripped your safety switch.

    Secondly, whenever you have two different metals in the presence of water, galvanic corrosion will occur. The result is normally a seized tank microswitch and then no way of registering that the tank is empty. Seeya later boiler element. With this design of tank, it's best to remove the tank from the machine and take it to the water.

    We repair the results of laziness every week!
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  5. #5
    Senior Member sprezzatura's Avatar
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    Chris, I'd like to come down to Melbourne and meet you some time: your sense of wry humour reminds me of my own (I've popped a few RCDs in my time but I'm getting better).

    Gentlemen, I'll share a trade secret (which Chris probably already knows): Boeshield T-9

    ... just don't accidentally spray any into the water reservoir. It tastes terrible.

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    TC
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    Quote Originally Posted by sprezzatura View Post
    Chris, I'd like to come down to Melbourne and meet you some time: your sense of wry humour reminds me of my own (I've popped a few RCDs in my time but I'm getting better).

    Gentlemen, I'll share a trade secret (which Chris probably already knows): Boeshield T-9

    ... just don't accidentally spray any into the water reservoir. It tastes terrible.
    You'd be very welcome sprezza!

    If you do head this way and it's cold- beware of yellow snow as well. It also tastes pretty gross.

    In a week where most of what I have had is negative (...google reviews- from ill-informed eggspurts ), it's great to have a little positive!

    Have a good'un...

    Chris
    Last edited by TC; 7th May 2015 at 07:53 AM.
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    Senior Member sprezzatura's Avatar
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    I'm originally from Seattle so I know about the yellow snow - but it makes great snowballs, especially if you bean someone in the head. I submit that more humour and less ego on CS would be most excellent and encourage people to delve into this ... crazy affliction. Dealio.
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    Quote Originally Posted by Talk_Coffee View Post
    This is not a good thing to do and I'd strongly recommend against it.

    Firstly, 230V and water are not happy bed partners. You are lucky you haven't tripped your safety switch.

    Secondly, whenever you have two different metals in the presence of water, galvanic corrosion will occur. The result is normally a seized tank microswitch and then no way of registering that the tank is empty. Seeya later boiler element. With this design of tank, it's best to remove the tank from the machine and take it to the water.

    We repair the results of laziness every week!
    Yes I am going to cease this practice. I am aware of Galvanic corrosion but I don't have that problem. Thanks for informing me I am lazy.
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    Well the Expobar has finally died for now after about 2.75yrs of virtually trouble free service. I suspect the pump is not pumping as it is making heaps of noise but does not stop when it has primed the boiler. I have tried to manually prime it but still it is not working so will most likely
    dismantle the pump & clean it if it is possible to do so.

  10. #10
    Senior Member sprezzatura's Avatar
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    Look for any inline particle filters too - they can get fouled with dirt and scale. A reciprocating pump is inexpensive and easy to replace: you can test it by disconnecting the downstream silicone hose and engaging the pump to see if it works. I find it easier to dismount the pump and use a jumper but this depends how comfortable you are around 230v

  11. #11
    Senior Member sprezzatura's Avatar
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    Addendum: you may need to clear the flow meter inlet jet too - it's very small and can block up easily. Is this machine semi-auto, volumetric or the big, shiny Leva?

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    Wink Re Expobar

    Thanks for that I will check for inline filters and
    engage the pump. I have been very comfortable around 230v
    while growing up and done some things I wouldn't dream of doing now
    but a little older & safer now.
    I should be able to test the pump in place with a bit of luck.

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    Quote Originally Posted by sprezzatura View Post
    Addendum: you may need to clear the flow meter inlet jet too - it's very small and can block up easily. Is this machine semi-auto, volumetric or the big, shiny Leva?
    Thanks for this tip I will see if I can find this flow meter inlet jet. My machine is just the standard one without the semi auto buttons & no shiny leva...I had a laugh I just haven't had time to look into it yet so I have been using
    my old sunbeam coffee machine which I wont be able to put up with much longer.

  14. #14
    Senior Member sprezzatura's Avatar
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    Hey - cool ! Don't worry about the flow meter - you don't have one.

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    Quote Originally Posted by sprezzatura View Post
    Hey - cool ! Don't worry about the flow meter - you don't have one.
    I haven't had time to worry about the flow meter I don't have yet. My last post was supposed to read I had a laugh after Shiny leva but it was changed to "I had a laugh"

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    Smile Re Expobar

    Quote Originally Posted by sprezzatura View Post
    Look for any inline particle filters too - they can get fouled with dirt and scale. A reciprocating pump is inexpensive and easy to replace: you can test it by disconnecting the downstream silicone hose and engaging the pump to see if it works. I find it easier to dismount the pump and use a jumper but this depends how comfortable you are around 230v

    Well I fixed the Expobar this morning by taking off the base and running the pump while the machine was on its side.
    I connected the wires to the pump from the machine and manually pushed the lever that operates the switch below the resevoir. It seemed to be moving the water but the lines had a lot of air in
    them. I disconnected the silicone line from the boiler & filled it with water as well as the 2 silicone lines that go into the resevoir using 2 spring loaded pegs to clamp the ends holding the water in.
    Once I had tried it and it looked like the pump was pumping I put the machine back together & put the resevoir lines in a milkshake cup full of water to gravity feed the water & run the machine
    & it primed itself straight away and is now working fine. Quite simple really. I did not think it would be major as the machine has been ultra reliable up to now & it is only 2 years old next month.
    Thanks for the help Sprezza from what little I have read the pump is a vibration pump not a reciprocating one. You are right it is best to take the pump out of the machine which is easy anyway
    by just removing the base at least that way you can see what is going on & if there is any air bubbles in the lines.

  17. #17
    Senior Member sprezzatura's Avatar
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    Behmor Brazen - $249 - Free Freight
    Nice work - glad to hear it was just an air lock: in the future you can fill the inlet silicone line with water and blow gently into it which will prime the pump straight away but the pegs were a great idea!



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