Quad CC3D esc beeps and not arming after crash

[markblue777]

Hi All,
So yesterday was out with the quad and I crashed (landed in wet grass, wet enough to have a bit of a splash). After the crash I tried to start it again, but the light on the cc3d turned green when battery was connected and it done a couple of beeps but not the full beeps the esc's normally do.

after getting home I dried it off with an air gun to remove any water and when connecting the battery it booted and armed as normal.

Any ideas on what caused this? is it a feature built into cc3d?

Cheers
Mark

 

[EyeStation]

It may have been the shock of the crash was to great. I have had that happen a couple times myself with the F3 EVO's on the micro's. Have to disconnect the battery and reboot again.

 

[Tony]

If there was water on the board, then it likely shorted some pins out which would not allow it to arm. I would take the board out, look at it up close and clean it with a cotton swab and some IPA (isopropyl alcohol) Water in its purest form (H₂O) is not conductive, but when you add minerals (sodium, calcium. iron) it does become conductive and can short things out.

 

[markblue777]

Hmm ok them maybe there was a short being generated as after i blasted it with air to get any moisture off it did initialise as expected so maybe that was it.

I will keep and eye on it and I will also take the board out and give it a clean may try and rework some wires to get the case on it again.

Thanks
Mark

 

[Tony]

I would definitely hit it with some alcohol. Alcohol absorbs water, but more importantly, it will remove the minerals that will corrode the electronics. I'm glad it's working.