THEA-130 / 160 Sprayer Drone
User Manual
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2019 FOXTECH All Rights Reserved
42
Failure Analysis
1) Cannot unlock
a. The accelerator is not set the lowest.
b. The tilt angle of the aircraft is too large.
c. The signal line of the receiver doesn’t connect well, or it has connected to the wrong interface.
d. Observe the warning from the ground station and check if sensors and the remote control have been
calibrated.
2) When do you need to calibrate the magnetic compass
a. If you have moved or disassemble the flight control or GPS,
or it’s far away from the region where you calibrated last time,
or the magnetic field has changed a lot.
b. You can check if the data from the magnetic compass is right, for example, if the aircraft turns around,
the course will change 360 degrees, and observe if the course data from the ground station is with the
actual match.
3) Rotating speed of motors doesn’t match when you increase the throttle.
a. If the throttle is too low, rotating speed of motors doesn’t match, but it matches after you increase the
throttle, it’s a normal phenomenon. If motors still don’t match after you increase the throttle, you need to
calibrate the ESC again.
4) rotate after taking off or flip
a. Check if propellers are installed correctly.
b. Check if the whirling direction of motors is right.
c. Check if the dynamic equilibrium of the aircraft is well. You can reference the “troubleshooting center” on
our official website to get more failure analysis, or you can contact us for technical support, we will answer
timely.
