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Can't Take Off - Stuck with IMU Initializing Error

Discussion in 'Pro/Adv Discussion' started by herein2014, Jun 18, 2016.

  1. herein2014

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    Has anyone had a problem where your P3 won't take off and reports that the IMU is still initializing? The status indicator in the App says everything is fine and ready to fly as GPS, but as soon as I try to start the motors I get an error that the IMU is initializing. I also checked the status screen and it said the IMU was normal and tried recalibrating the IMU and compass.

    So far nothing will make the IMU initializing error go away and it will not take off with the error. It flew perfectly fine just 30 min before. Then I swapped batteries and now it won't take off.
     
  2. 4wd

    4wd

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    Could be temperature related as it affects the barometer.
    It's worth calibrating the IMU when it's cold even putting it in the fridge for 20 minutes then be ready to go the moment it's turned on.
     
  3. rhexis

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    my first p3p had that issue and would not show any values in the imu settings when i went to calibrate. i returned it and my new one is fine.
     
  4. herein2014

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    I somehow fixed it in the weirdest way. This is a P3 that has flown hundreds of flights and never had a single problem. I upgraded all of the firmware and DJI GO app to the latest, recalibrated the IMU, etc. and the error was still there. There was a large metal sewage drain with a metal manhole cover not far from where I was trying to take off. I always avoid getting near anything like that because it causes compass errors. Well I decided maybe making the compass get an error would fix the IMU problem and so I sat the P3 directly on top of the metal manhole cover and it actually worked. It gave me a compass error but let me take off manually and in mid air the IMU problem went away. I landed, recalibrated the compass and all was fine.

    Definitely not for the faint of heart or anywhere near people or other valuable objects but it did work.
     
  5. kitefiter

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    I have the exact same problem. Worked fine at last flight. It will not start now. As I do the CSC maneuver the screen flashes the imu warning. Trying to figure away around this.
     
  6. flyNfrank

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    Get the AirCraft (A/C) as cold as possible, and then recalibrate the IMU. The colder you can get to refrigerator temps, and the sooner you can get the process started after removing from the cold area....the sooner the A/C(IMU) will be ready for starting up for flight. Mine happens now almost instantly. I do a compass calibration and the flight begins.

    Btw, back to IMU calibrations. When you power on the A/C the a heater begins immediately raising the temp of the IMU. This is why you want to begin the calibration as soon as you can get in on a level surface and select start calibration in the IMU sensor section.
     
    Mako79 likes this.
  7. kitefiter

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    Thanks! Worked like a charm. I really appreciate this forum.