Bosch Wfo2866gb/07 No Motor

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  • June 13, 2007 at 6:09 am #28087
    bobokines
    Participant

    Hi

    Can someone help me to diagnose this one please.

    Wfo2866gb/07 Two and a half years old and low usage.

    I’m not sure whether to blame the motor or the module. After one minute of pump out, the motor ramps towards spin and aborts instanty. It tries again twice and then cancels the program and “01” appears in the display.

    My feeling is that there is no tacho feedback but I cannot find any bad connections on the motor harness or the module connections. (I am not sure how to read the correct resistances on the motor.)

    Any advise before I order a new motor?

    Many thanks

    Bob

    June 13, 2007 at 7:54 am #216855
    clivejameson
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    IIRC the motor connections are in pairs in the connector block Bob…ie armature pair next to each other, field pair next to each other and same for tacho. Again IIRC the reading for the tacho is in the order of 16-18 ohms?

    When the motor ramps up does it run nice and smooth?

    June 13, 2007 at 8:26 am #216856
    bobokines
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    clivejameson wrote:

    When the motor ramps up does it run nice and smooth?

    Didn’t get a chance to. It aborts within half a second. Seemed smooth though.

    Bob

    June 13, 2007 at 9:30 am #216857
    gegsy
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    Hi
    Check your email Bob 😉
    I would put money on module if motor and loom are ok and no earth leakage 🙂

    Greg

    June 13, 2007 at 4:12 pm #216858
    bobokines
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    Thanks Greg. A bit of bedtime reading :rolls:

    Bob

    June 13, 2007 at 6:15 pm #216859
    gegsy
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    bobokines wrote:Thanks Greg. A bit of bedtime reading :rolls:

    :look:

    July 4, 2007 at 6:00 am #216860
    bobokines
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    Follow up on this one.

    It turned out to be the motor. Surprisingly, I can’t find anything wrong with the motor with the test meter. Resistances of tacho, arm and field were exactly the same as the replacement motor and the earth reading was infinity.

    Wondering if the fault may be intermittent on the module, I reconnected the old motor to make sure, but the fault followed the motor.

    Although the machine is now working and everyone is happy, I would still love an explanation of the fault! I hate not knowing!

    Bob

    July 4, 2007 at 7:42 am #216861
    clivejameson
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    Does the tacho magnet have a crack in it?

    Just a thought…. :con:

    July 4, 2007 at 5:56 pm #216862
    bobokines
    Participant

    Re: Bosch Wfo2866gb/07 No Motor

    That’s the only thing I could come up with. We’ll never know for sure as I left the motor with the customer.

    Bob

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