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Sunbeam EM6910 purging air from pump procedure?

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  • Sunbeam EM6910 purging air from pump procedure?

    Hey guys!

    So I have a EM6910 which had a faulty steam pump.

    I've replaced the steam pump but now the main pump doesn't pump any water - the steam pump also doesn't but I can hear the pump working now (used to be dead).

    According to this thread below I may have an air pocket which is ruining things:

    http://coffeesnobs.com.au/brewing-eq...not-worki.html

    Unfortunately fandrews did not mention what the procedure was for purging air pockets from the water system and he has not responded to my PM (yet).

    Can anyone help?

    Also, any ideas on why the single cup button does not work? It starts as per usual, doing the quick pre-infusion part but then just stops. Faulty mainboard maybe?
    It was working fine up until a week ago. I can still use manual/double buttons fine so seems pretty wierd.

    Thanks!

  • #2
    I have managed to produce fairly good coffee for 10 months or more from my EM6910. First thing I did was run the cleaning cycle using my non-tap water. (Reverse Osmosis) I didn't have the tablets, I used a descale solution from the people from whm I got my beans.

    About 3 days back I ran the cleaning cycle again and I got distracted while the steam wand was purging the descale. After about 15 minutes, as I was walking back to the machine, there was a loud sputter and hiccup and suddenly my steam was VERY loud.

    I had done this process probably 7 or 8 times before, but this time the burp was noticeable. Now I have MUCH more powerful steam and I have to get the microfoam right in much shorter time before I get 70's cappuccino froth... (what the missus calls porn froth. )

    So... clean your machine. Use water as pure as you can get it and be prepared to let the system do its thing at least 2 or 3 times. Let the steam run for 15 minutes WITH a descaler solution coming from the water system. Run a descaler solution, NOT the tablet stuff, through the backflush program. Then run even more through it in every outlet. Then do it all again with pure water. Twice.

    Then take the machine apart (seal, showerscreen and internal screen) and clean EVERYTHING, and the do the entire cleaning process again.

    Seriously... I did this at least once per month since January and 5 days back my steam system suddenly cleared it's throat and now I have to relearn how to make my milk.

    Comment


    • #3
      Thanks for your reply but I am not sure you really read my post... I have an air pocket in my pump I need to purge.

      Comment


      • #4
        Sunbeam EM6910 purging air from pump procedure?

        A couple of things to check: is the tank pushed firmly in? If yes try removing the calc filter and reinserting the tank without the filter and try the machine. Try to purge water by using the hot water wand.
        You could well have an electrical issue - the pump should be trying even with an air lock. Re the single cup button, check the board, it is a simple switching mechanism. Note that the boards all must be very dry, if you got moisture on any of them you will cause problems, I had to use a heat lamp to dry my main board after a similar repair.

        Comment


        • #5
          Sorry, I wasn't very clear in what I was suggesting. I meant maybe try letting the steam pump run for a while (like 15 minutes or so) and see if it clears its throat. I'm not sure how an air pocket in the steam system would block things - the pump only sends water intermittently into the thermoblock at the best of times. You can adjust how long it is off using the program so as to make the steam drier or wetter.

          So my guess was more that you may have a blockage in the steam system - I missed cleaning my steam system a couple of times and it was taking longer to start the steam - the pump was running very quietly until the water reached the wand then it got louder. Once I ran the cleaner through it was much quicker to start steam. Particularly after the last 'burp' - now it is maybe 2 seconds to begin the steam.

          For the main pump issue, maybe open things up again and make sure you didn't dislodge any wires etc.?

          Comment


          • #6
            Hey guys,

            As suggested I just turned the machine on and tried the hot water system first. This worked fine.

            So I then tried the main pump and the steam wand and both now working too! Steam probably hasn't been used for a while since the pump was broken but after a minute it appears to be flowing well.

            Not sure why its now working, maybe activating the hot water knob cleared the bubble (if there was one).

            Now my only problem is why the single button doesn't work. As mentioned it does activate and starts to work but then just stops after pre-infusion so leads me to believe a faulty component on the mainboard.
            This was faulty before I replaced the front control panel and still not working so the problem is not related to that.

            I will take a look at the main board, have to take the cover off again anyways to put some plastic joins back in which I didn't know where they came from - they help prevent vibration/noise.

            Comment


            • #7
              Originally posted by Journeyman View Post
              I have managed to produce fairly good coffee for 10 months or more from my EM6910. First thing I did was run the cleaning cycle using my non-tap water. (Reverse Osmosis) I didn't have the tablets, I used a descale solution from the people from whm I got my beans.

              About 3 days back I ran the cleaning cycle again and I got distracted while the steam wand was purging the descale. After about 15 minutes, as I was walking back to the machine, there was a loud sputter and hiccup and suddenly my steam was VERY loud.

              I had done this process probably 7 or 8 times before, but this time the burp was noticeable. Now I have MUCH more powerful steam and I have to get the microfoam right in much shorter time before I get 70's cappuccino froth... (what the missus calls porn froth. )

              So... clean your machine. Use water as pure as you can get it and be prepared to let the system do its thing at least 2 or 3 times. Let the steam run for 15 minutes WITH a descaler solution coming from the water system. Run a descaler solution, NOT the tablet stuff, through the backflush program. Then run even more through it in every outlet. Then do it all again with pure water. Twice.

              Then take the machine apart (seal, showerscreen and internal screen) and clean EVERYTHING, and the do the entire cleaning process again.

              Seriously... I did this at least once per month since January and 5 days back my steam system suddenly cleared it's throat and now I have to relearn how to make my milk.
              Don't want to take this off topic but the manual states not to run descaler through the steam wand?
              From page 32

              Important: Do not run descaling solution through the steam wand

              Cheers

              Robbo

              Comment


              • #8
                you should not run the descaler through the wand with the heating element on.
                The solution can be toxic when vapourised and inhaled
                there's a funny procedure for doing it though.

                -remove rear cover
                -heat machine up, purge steam system, then leave heating for 5-10 minutes
                -turn off and disconnect power
                -un-plug the power feed going to the steam thermoblock (and insulate the disconnected connector)
                -turn machine back on and it should start up fine as the thermoblock is already very hot.
                -run solution through steam system, it will just pump hot/ warm water rather than vapourising the toxic de-scaling solution

                Comment


                • #9
                  Where did you find that procedure Robbo? Looks like a once a year job I reckon.

                  Might depend on the descaler - mine worked fine and no noxious smells. I had read the manual prior to getting descaler to see if I had to use the tablets. I mentioned the descaler/steam wand issue at the local roasters and was assured the Cino Cleano (they couldn't buy a decent name? ) was fine to go through the steam system.

                  And as mentioned elsewhere, it has worked in excellent manner - my steam is now stronger and starts faster than it has since I had the machine.

                  Comment


                  • #10
                    That was a procedure I figured out when replacing the blown steam thermoblock fuse (240'C) for the third time.

                    Comment

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