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Thread: Sunbeam 6910 steam pump on all the time

  1. #1
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    Sunbeam 6910 steam pump on all the time

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I have just replaced my steam pump after a failure and some water damage from a filling spill. It has had 3weeks with the back off to dry out.

    Now as soon as it is turned at the power point the pump starts working. It produces good steam pressure and the wand can be turned off but the pump stays on.

    Other functions are working.

    Any ideas about a fix or has the water fried something?

    Cheers, Peter.

  2. #2
    Senior Member Xanthine's Avatar
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    Any ideas about a fix or has the water fried something?
    Most likely I'm afraid.

    There is no mains switch in the 6910 - Active is connected directly to the pumps, heaters, solenoids etc . The neutral wire on each device contains the opto-coupler & triac switches as part of the control board which complete the circuit when activated by the micro-controller. The triacs can fail 'short circuit' and cause the circuit to operate whenever power is on to the machine.

    Closing the steam tap with the pump running continuously will cause a pressure build up and pump overload.

    The usual repair method involves control board replacement which is fairly complex and best left to a specialist.

  3. #3
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    Thanks for that. Not good nwes, but I have nothing to lose and like a challenge.

    Ive heard on another post it's possible to replace the offending triac with a bit of messing around and some soldering skill.

    I think I'll start by removing the control board to have a look and go from there.

    Locating the new part may be an issue as well. Any ideas?

    I contacted RS Spares but they want a part number and "triac" seemed unfamiliar to them.

    Thanks again, Peter.

  4. #4
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    @pwinch This is not intended as criticism or sarcastic sniping, so please don't take it as such.

    You do have to realise you're working with mains voltage there. Having just said that you're not clear what the "part number" of the offending triac is, my initial feeling is that you should locate a friend who already knows what they're doing and bribe them with coffee and ask them to fix it - and show you how it's done.

    Better yet - get a quote from an appliance repair place and see...

    Mains power is not the thing to "just 'ave a go" at - you could kill yourself and/or someone dear to you.

  5. #5
    Member alexm1's Avatar
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    I think this post has the part number or the triac

    EM6910 pump starts AUTOMATICALLY
    https://r.tapatalk.com/shareLink?sha...8&share_type=t

  6. #6
    Senior Member Jackster's Avatar
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    I got the triacs easily and quickly for a board that was pumping all the time. I haven't changed it yet, but it is on the to do list. I swapped in another board.

  7. #7
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    Thanks for the input. I certainly am aware of mains power safety and would not attempt any such repairs if I didn't think I could do it safely. I appreciate your concern for my wellbeing and take no offence from your comments.

    I think I have a part number from the link given and will follow it up.
    inorog likes this.

  8. #8
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    RS part number for the triac is 544-9961.

    It's an easy repair but does take some finesse with the soldering iron. It's a double sided PCB so the solder can be a bit more difficult to remove than a normal single sided board. It's worth investing in a reel of solder wick to make the job easier as well.

  9. #9
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    An update. I replaced the triac, but still hasn't solved the problem.

    On closer examination of the PCB there are a number of connections which appear to be discoloured with a light brown , slightly burnt look, so there could be multiple failures.

    Now i'm after a replacement PCB. I was wondering if anyone has a spare hanging around surplus to needs?

    I'm in Adelaide and am happy to pay postage. Otherwise I will look at a new one online.



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