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  1. #1
    Join Date
    Oct 2016
    Posts
    2

    Fanuc 16i Problem 920

    I have a big problem
    The machine is in error attached image and do not know how to solve it.
    I changed the card but the problem persists.

  2. #2
    Join Date
    Apr 2009
    Posts
    1379

    Re: Fanuc 16i Problem 920

    What card did you change?

  3. #3
    Join Date
    Oct 2016
    Posts
    2
    Quote Originally Posted by memoryman View Post
    What card did you change?
    servo card

  4. #4
    Join Date
    Apr 2009
    Posts
    1379

    Re: Fanuc 16i Problem 920

    From Fanuc maintenace manual:
    A watchdog error or RAM parity error occurred in the circuit on an axis control card.
    Alarm 920 indicates that either of the above errors occurred in the control circuit for axes 1 to 4. Alarm 921 indicates that either of the above errors
    occurred in the control circuit for axes 5 to 8.
    The axis control cards, CPU card, or motherboard (main CPU board) may be defective.
    You may have to swap/replace any of: the axis control cards, CPU card, or motherboard (main CPU board).

  5. #5
    Join Date
    Apr 2009
    Posts
    12

    Re: Fanuc 16i Problem 920

    It is ok to dismantle the motherboard with worry to erase the machine data and parameters. Is there instruction on how to replace the motherboard and axis card. Thankx

  6. #6
    Join Date
    Apr 2009
    Posts
    12
    Quote Originally Posted by memoryman View Post
    From Fanuc maintenace manual:
    A watchdog error or RAM parity error occurred in the circuit on an axis control card.
    Alarm 920 indicates that either of the above errors occurred in the control circuit for axes 1 to 4. Alarm 921 indicates that either of the above errors
    occurred in the control circuit for axes 5 to 8.
    The axis control cards, CPU card, or motherboard (main CPU board) may be defective.
    You may have to swap/replace any of: the axis control cards, CPU card, or motherboard (main CPU board).
    I have also problem with 921 alarm. Do you have instructio on how to replace motherboard and Axis Card. Thankx

  7. #7
    Join Date
    Apr 2009
    Posts
    1379

    Re: Fanuc 16i Problem 920

    The maintenance manual has the procedures for replacing boards or modules.

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