I just posted this message on the DJI forum, FYI, all...
|About a year ago i purchased an M210 RTK - version 1. I let it sit for months before "activating" it, and enjoying an afternoon of test flights with TB50s and no external camera (no problems). Then i let it sit for months in anticipation of choking up the cash for an XT2. I did get an XT2 and only recently purchased a couple sets of TB55s, meaning i once again had to do a little testing just to make sure these very expensive batteries were functioning properly.|
Since I do not yet have the battery station that accomodates the TB55s (in order to discharge them) and I know this thing will be sitting again for quite some time I've been discharging the batteries for storage by simply turning on the aircraft - and that takes a long time when you're not flying. It occurred to me to run the motors - without the props mounted, of course, to expedite the discharge a little bit; and that meant using the controller.
After just a few minutes with the motors running they suddenly stopped WITH NO INPUT FROM ME and I saw that the radio controller was now showing the "CANNOT TAKE OFF" message. I switched off the RTK link in order to re-start the motors - something I had already done in the first place in order to engage the motors without the RTK system.
I don't know if the mysterious crashes that I've read so much about in the last year could be attributed to this - I assume this would only be an issue for the M210 RTK - but if my aircraft had been in the air when this happened it would certainly have been catastrophic. I might very well overlook that "cannot take off" message while pouting over the wreckage. The controller was the Cendence, which was part of the package.