FAQ

- Calibrate the compass at the field you're flying at.
- check is magnetic declination setting is set properly in the graphic interface program
- see if the GPS module catches enough satelites (8-9) for more acurate positioning

- open the graphical interface and double check if your transmitter is properly configured (refer to the manual)
- calibrate the Accelerometer
- make sure the copter is leveled (a led will blick when the copter is tilted and will stop blinking when leveled). Due to safety measures, the copter won't ARM if not leveled
- check if you're not in baro mode (altitude hold). The copter won't ARM in this mode due to safety measures.

- check if propellers are mounted correctly (refer to the manual)
- check proper motor rotation (refer to the manual)

- calibrate the TX (refer to the manual). This is super important! Not properly calibrated TX can also disturb the work of the GPS and other modes!
- make sure the copter stays completely still during power on sequence. It calibrates the gyro.  
- make sure MAG is disabled in all flight modes.