No ESC tones after crash

Hi All,

So during an autonomous flight on GPS and the copter lost its fix and went to failsafe and landed, into a fence unfortunately.

I took the copter in for inspection and powered up to verify all was functioning correctly however there was no tone from the ESC's. I connected each ESC to the receiver individually to ensure the receiver, ESC's and motors were all functioning correctly and they all were.

The flight controller will arm and pre-arm checks are enabled therefore all of those parameters are safe however even after arm no signal is sent to the ESC's and/or motors. The FMU has a Solid blue LED and a flashing red LED after the start-up process has finished.

I have no idea what to look for now I have checked everything I can think of.

Cheers

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Replies

  • Ok so I have now confirmed that the PX4 is not receiving the ppm from the receiver. I am trying to confirm whether it is the receiver or the FMU that is at fault. the receiver is definitely receiving all channels however the receiver was retro fitted to accept a PPM signal with a soldered wire that may have come loose.

    I will update any findings soon however if the receiver is confirmed to be functioning correctly what could cause the FMU to no longer receive PPM signals?

    Cheers

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