What’s wrong with my MIELE S4212?

Home › Forums › Public Support Forums › Help And Support › Vacuum Cleaner Help Forum › What’s wrong with my MIELE S4212?

Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • December 26, 2015 at 8:15 pm #87133
    EricLeBouffon
    Participant

    I’ve had a vacuum cleaner broken for a while and I finally decided to try and fix it…

    I dismantled everything.
    The only obvious problem was that there was an incredible amount of dirt right in the engine. I can’t think any air could get through so I cleared this manually.

    According to my wife, the “original” problem was that it made a lot of noise.
    Somehow, I suppose the air flow being entirely stopped, this might explain it.

    However, the current problem is that “nothing” happens when I switch it on…

    I tried to check that the power cable is fine (circuit testing) and it seems fine.
    I checked the switch and this seems fine too.

    I am a bit at a loss as what to do next…

    Would it be reasonable to put some cabling together to send 240v straight to the engine, bypassing the Miele electronics :death: ?…
    Is there any other way I could assess whether the engine is still working?


    Thanks

    Eric

    December 28, 2015 at 9:25 am #434043
    mundaysrepair
    Participant

    Re: What’s wrong with my MIELE S4212?

    Hi I’m Nick I run a repair business in Northampton,

    You could check for motor function by sending a supply directly to it, but only if the motor is rated at 240V! Check the data plate on the motor first to be certain it is designed to function in the 220-240v range. The electronics you mentioned are responsible for suction control and possibly have become damaged/disconnected during maintenance.
    If the motor works during testing check again for loose connections. If the motor doesn’t work check for fluff build up around the carbon brushes and also remove the carbon brushes and check for wear. They should be >5mm in length to function correctly with a bit of spring left in them. With the brushes still connected to the motor you should read continuity across the motors two terminals, <10 Ohms.

    Try to have everything connected with the top cover off and energise the vacuum, do you read 240v going to the motor?

    That’s about all you can test with a basic meter, let me know how you get on! Oh and be sure to have the motor braced in an insulated vice or something else sturdy and non-conductive. These motors take off and can read 1000s…. rpm instantly!

    Nick

    December 28, 2015 at 10:43 am #434044
    EricLeBouffon
    Participant

    Re: What’s wrong with my MIELE S4212?

    Hi Nick,


    Thanks a lot for your help.
    I’ll give it another try…


    Cheers


    Eric

  • Author
    Posts
Viewing 3 posts - 1 through 3 (of 3 total)
  • You must be logged in to reply to this topic.