Posible failure of controller KEB72801X

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    jotaemes
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    Hello
    My scooter of 72V 5000W with controller KEB72801X and battery LiFEPO4 72 V 50Ah has failed; it doesn´t start.

    With the switch on:
    If the wheel motor is slowly turned manually , it turns with rhythmic slight lockings, and it doesn´t start.
    If the wheel motor is quickly turned manually , it starts.
    With the switch off:
    the wheel motor turns manually correctly

    The controller red leds don´t give error signals

    Please may anyone help me about the possible cause of this failure?

    Thank very much in advance

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