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Thread: 414 SERVO ALARM

  1. #1
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    Question 414 SERVO ALARM

    Help me please,
    My CNC is Fanuc 18M router machine.
    When i turn on power. The machine has an error 414 SERVO ALARM. X,Y,Z axis detect error. I think that is lower DC voltage.
    I see the led on main power is 02
    00 is ready
    -- is not ready
    ## is number code
    Can you help me? How is the 02 code?

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    Smile

    I just check 24V DC power. I changed a new cooling fan. Number 02 alarm code become --. but on screen has a message "401 X,Y,Z,V,A SERVO VDF DETECT ERROR"



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    cant remember what 414 is, but Fanuc have good maintenance manuals so you should find one for your machine and read it.



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    check in electric cabinet the cables JS1A JS2A JS3A AND JS1B JS2B JS3B for bad contacts.

    u changed the cooler form upper side or from inside?\
    i think you have 1 also inside but i am not so sure and maybe u can check .



  5. #5
    I have this alarm 444: 4th axis detect error . My DGN for this alarmbis 723 bit 6 . Says LOW VOLTAGE. Somebody help me pleaseee

    Enviado desde mi GT-I9300 usando Tapatalk



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    I had a similar alarm on my Haas we replaced the vector drive and that solved the problem.

    Sent from my R800i using Tapatalk 2



  7. #7
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    Quote Originally Posted by dung_ninhbinh View Post
    I just check 24V DC power. I changed a new cooling fan. Number 02 alarm code become --. but on screen has a message "401 X,Y,Z,V,A SERVO VDF DETECT ERROR"
    -cnczone-jpg
    "2" low voltage
    if your drive is A06B-6066-Hxxx check circuit breaker inside the drive and of course all power connections (R, S, T)
    if incoming voltage is OK, then it's needed to check PCB inside the drive

    Russia


  8. #8
    Ill try tomorrow changing the cables for DC link because the alarm is only for the 4th axys

    Enviado desde mi GT-I9300 usando Tapatalk



  9. #9
    When i do turn to the motor i look in my position screen that B coordinates changing so the encoder its fine

    Enviado desde mi GT-I9300 usando Tapatalk



  10. #10
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    the DC wires are too thick to be bad, besides you may measure DC voltage on incoming terminals L+ L-
    step 1: measure DC voltage. is it OK?
    no -> the fault is searched, think what to do further
    yes -> go to step 2
    step 2: swap control cables between axes. the fault moves to another axis?
    yes -> the drive or motor is faulty. think what to do further
    no -> the problem is not in drive. think what to do further

    tell what type of axis control card is being used?
    -cnczone-jpg

    Russia


  11. #11
    Fanuc service says the DC Link voltage must be between 370 to 400 VDC .

    Enviado desde mi GT-I9300 usando Tapatalk



  12. #12
    My measure its 305 VDC

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