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Water crash - question on startup

Discussion in 'Phantom FC40 Discussion' started by cman, Dec 7, 2014.

  1. cman

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    Been lurking here for months now.

    Last weekend I had my first significant crash and wouldn't you know it it had to be in water.

    Totally my fault as I clipped a branch on takeoff and crashed into a lake. The FC40 was in the water at most for 10 seconds since it was close to shore and I was able wade in to get it.

    I immediately pulled the battery and started shaking it. Went inside, opend the shell and dried off whatever water I could see. I unplugged all the connectors and put it in a box and and filled it with rice. It stayed there for 7 days.

    Cleaned it off today and fired it up. All the proper light sequences happened happened and I was able to calibrate the compass.

    Everything looked fine. The I pulled the sticks to start the motors and..... nothing.

    Is there something I can check? Am I out of luck?

    Thanks for the help!
     
  2. CityZen

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    Do you hear the startup tones? In any case, check out the ESCs very carefully.
    Look at the 6 FETs on each and see if you see any unevenness on them.

    Also, check for silly stuff, like not having the switches in the upper position.
     
  3. cman

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    Thanksfor the reply.

    I get the usual beeps. The red and green lights on each arm go on and then off once I connect the battery. Then I get the sequence of lights on the main indicator light until I get two series of fast flahing green lights.

    Up to this point I don't see anything different.

    I'll open the case to check the ESC\FET.
     
  4. IflyinWY

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    Location:
    Where the deer and the antelope play
    Are you using the same battery that went for a swim?
    Did you double check the connections to ensure they are in the proper location?
    I hope it's simple, like you forgot to plug something back in. ;)

    Connect to Assistant Software, on an old computer you wouldn't mind crashing. Do motor tests & advanced IMU calibration.
     
  5. cman

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    Thought I would update this.

    So I relaized that I was plugged into the wrong ports on the NAZA controller. I moved them to M1-M4 and did a test flight. It went about a foot into the air and flipped over. Then I did a but more research to figure our which arm plugged into which specific port on the controller.

    Success. I've done a few test flights. Will do more over ther weeked. So far so good.

    Thanks for the help.
     
  6. lhardonk

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    I know it's been a long time, but did you happen to purchase a new battery or is it the same one that went in the water?