Creda 37649 Tumble Dryer

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  • February 24, 2011 at 9:13 pm #61302
    Hollytree_Technical
    Participant

    Hi all

    A bit of a head scratcher for you – I have been called to the above machine because it is failing to turn the motor, I thought that the motor start cap would have failed but when I tested it I got a value of 6.59uF (should be a 7uF capacitor), I have also tested:-

    Both windings in the motor – both fine.
    All the wiring all the way back to the plug including from plug to motor.
    I have bypassed the timer and hard wired the motor to the incoming mains.
    Checked voltage to motor – 220VAC
    Checked motor operation with out belt attached – works both directions.
    spun unloaded motor by hand to check bearings – free moving.
    Put the belt back on and turned the drum by hand – all feels normal.
    Insulation tested whole machine – 8.2M ohms.

    And after all this it still just sits there and hums – heater works fine and I have even tried disconnecting the heater to check for a lack of current.

    Does anyone have any ideas – can induction motors go weak without showing any fault on the meter?

    Thank you in advance

    Jem

    February 24, 2011 at 9:32 pm #345604
    spimps
    Participant

    Re: Creda 37649 Tumble Dryer

    Perhaps worth trying a new capacitor.

    February 24, 2011 at 9:47 pm #345605
    Specialist01269
    Participant

    Re: Creda 37649 Tumble Dryer

    As Spimps said, I would try a new Cap. The problem with using a Capacitance meter to test a Mains cap is that the meter only uses a low voltage to test, so it can’t really be accurate. I use an ESR meter to check Caps which is more accurate but not foolproof with Motor caps.

    February 24, 2011 at 11:32 pm #345606
    neilsukwg
    Participant

    Re: Creda 37649 Tumble Dryer

    Hollytree_Technical wrote:

    And after all this it still just sits there and hums –

    Jem

    Have you tried giving the drum a helping hand when the motor hums?

    If it starts turning with a helping hand fit as new cap, if it doesn’t its a new motor or ber.

    Neil

    February 25, 2011 at 12:47 am #345607
    Hollytree_Technical
    Participant

    Re: Creda 37649 Tumble Dryer

    Should have said that yeas I have tried kick starting the drum/motor manually with no joy which is another reason why I didn’t think it likely to be cap although I will admit that even though I had one with me I didn’t actually try replacing it.

    Jem

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