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Thread: Sunbeam EM6910 pressure gauge dead

  1. #1
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    Sunbeam EM6910 pressure gauge dead

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Im a long time lurker, first time poster.* Spent a lot of time reading about the EM6910 and words of wisdom from everyone, especially AM and Thundergod.* Im well aware of the fragile/fickle nature of the beast but decided to buy one in Dec 2010.* Been looking after it with a descale followed by chemical backflush every 2 months (removing and cleaning the seal and screens at the same time) and a weekly water backflush.

    A few days ago, my pressure gauge stopped working.* Not even a flicker.* Even tried a few more water and chemical backflushes (not a flicker of life from the needle) as well as pushing a thin wire up the hole at the back of the grouphead where I encountered resistance at about the 15mm mark.* I suspect its a bend in the pipework.

    It still pours fine (puck is nice and firm and dry) and the 3 way valve still operates.

    Ive done a lot of searching on this site and havent come across anything that might give me a glimmer of hope.* Any other suggestions guys?* Its under warranty so Im loath to open up the back of the unit.

    Im going to take it into Goddens Electrical in Perth.* Any Perth forumites have any opinions about Goddens? Been quoted 10-15 days to repair. Thats a looong time without coffee. :(

  2. #2
    Senior Member artman's Avatar
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    Re: Sunbeam EM6910 pressure gauge dead

    The feed for the pressure guage tees off the line that goes to the backflush solenoid. If you are a tinkerer type and confident taking things apart, you could remove the copper tube feeding the guage and see if its blocked. Obviously you dont want to do this if its still under warranty. If a bit of crud has gone into this tube, its unlikely to get washed out again as its a dead end to the guage, so doesnt get "flushed out" with water flow.

    If its blocked by some dirt etc, would this be covered by warranty?

    On my machine there was a blockage in the copper tube connecting to the brew head, which stopped the guage and backflushing from working. Once unblocked it all works fine.

    The wire up the grouphead wont do much unless the blockage is close, there are too many bend to negotiate. The guage feed is a long way off.

    There is heaps of info on this forum for taking the machine apart etc which was very useful.


  3. #3
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    Re: Sunbeam EM6910 pressure gauge dead

    If it was me I wouldnt bother trying to fix it. The gauge is only a rough guide anyway and what really matters is the pour, the timing of the shot and the taste. I rarely look at mine.

  4. #4
    Senior Member trentski's Avatar
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    Re: Sunbeam EM6910 pressure gauge dead

    My machine doesnt even have a pressure gauge for the brew pressure ;D

    You are within the warranty period so get it fixed. Perhaps you could ask for a loan machine or just a straight swap? broken for fixed?

    Maybe you could be extra nice to them and they could do it while you wait? 8-)

  5. #5
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    Quote Originally Posted by artman View Post
    The feed for the pressure guage tees off the line that goes to the backflush solenoid. If you are a tinkerer type and confident taking things apart, you could remove the copper tube feeding the guage and see if its blocked. Obviously you dont want to do this if its still under warranty. If a bit of crud has gone into this tube, its unlikely to get washed out again as its a dead end to the guage, so doesnt get "flushed out" with water flow.

    If its blocked by some dirt etc, would this be covered by warranty?

    On my machine there was a blockage in the copper tube connecting to the brew head, which stopped the guage and backflushing from working. Once unblocked it all works fine.

    The wire up the grouphead wont do much unless the blockage is close, there are too many bend to negotiate. The guage feed is a long way off.

    There is heaps of info on this forum for taking the machine apart etc which was very useful.
    Hi artman,
    I have the same problem at the copper tube. But i have no idea how to take it off.
    Could you give me some hints ?. Thanks

  6. #6
    Senior Member artman's Avatar
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    you mean how to take off the copper tube? From memory its just nuts holding the pipes on. Use a spanner, be careful not to bend anything, sometimes a sharp "knock" on the end of the spanner is effective for cracking the connection .

    Cheers

  7. #7
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    I also have a pressure gauge that stopped working some time ago . I have already voided the warranty on my em6910 machine over another problem so I may as well have a go at this fault as well. From previous tinkering, the machine is quite complex to pull apart. To test it, you have to turn it on with all the electrical components exposed, so watch out for electrical shocks. Your rcd does not necessarily protect you from a shock.



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