Troubleshooting
Last updated
Last updated
Symptom
Potential Cause
Potential Solution
Boot Fail
Voltage limits exceeded
Check voltage of flight packs and replace as necessary
Compass readings out of limits
Check surroundings and boot in an area away from ferrous objects. Recalibration of the compass.
Compass Warning
Invalid compass calibration
Calibrate the compass
GPS Warning
GPS/Compass Unit has become disconnected
Check the GPS/Compass unit wiring for damage
Accelerometer Warning
Hard landing
Reboot ALTA Pro
Motor Warning
ESC or Motor failure or error
Contact Freefly Customer Support immediately. Do not continue flying ALTA Pro.
Symptom
Potential Cause
Potential Solution
ALTA Pro will not arm
Radio not bound
Follow radio controller manufacturer’s binding procedure
Radio not mapped properly
Check radio mapping charts for correct behavior.
Adjust mapping as necessary in ALTA Pro QGroundControl
Flight Controller boot not successful
Power cycle ALTA Pro. Ensure it does not move during boot
If ALTA Pro must move during boot (such as on a moving platform), use Motion Booting
Low Battery
A low battery error latches and does not allow further take off without a battery replacement.
Symptom
Potential Cause
Potential Solution
Unexpected flight behavior
Tuning too high or too low
Revert tuning to the last known working configuration
Set tuning back to default values
Alta Pro seems to "hop" or "dip" at the end of a climb
Hover throttle not set correctly
Change hover throttle to match weight of aircraft. 49% for ~10lb payload, closer to 40% for light aircraft.
ALTA Pro does not maintain level pitch or roll
Pitch or Roll Trim position not set
Use the ALTA app to set the appropriate pitch and roll trim
ALTA Pro oscillates or vibrates during flight
Tuning too high or too low
Check flight settings and tuning parameters in the App. Revert tuning to the last known working configuration. Re-tune.
Propellor Damage
Check for damage to propeller blades. Replace with spares as required.
Propeller blades unbalanced
Replace with spares as required. Propeller blades are balanced and matched at the factory.
Hinge or motor misalignment
Thoroughly inspect ALTA Pro following any accident. Contact Freefly for further inspection and assessment.
Ice on Propellers
Ice build-up is causing vibrations due to unbalanced propellers. Remove ice from propellers before further flights.
ALTA Pro is sluggish in response to commands
Tuning too low
Check tuning in ALTA Pro and adjust as required
Flight weight is over limit
Weigh the ALTA Pro and compare to the Allowable Gross Weight table in this manual. Remove weight.
ALTA Pro ascends or descends when switching between flight modes
Hover Throttle set incorrectly
Follow the instructions listed in the ALTA Pro Flight Parameters section of this manual to adjust Hover Throttle
ALTA Pro does not maintain heading
Yaw during boot
Re-initialize ALTA Pro while keeping ALTA Pro stationary in all directions
Unexpected behavior in Position Mode
Position lock not achieved
Monitor ALTA Pro QGroundControl and takeoff only after Position Lock has been achieved with strong GPS signal
Incorrect heading due to yaw during boot
Re-initialize ALTA Pro while keeping ALTA Pro stationary in all directions
Compass corruption or calibration
Check surroundings for ferrous objects or magnetic interference. Calibrate the compass.
ALTA Pro circles a point in Position Mode
Compass calibration is invalid
Calibrate the compass
Position tuning values too high
Reduce Position tuning values very slightly following the PX4 tuning guide.
ALTA Pro does not track straight in Position Mode
Compass calibration invalid
Perform a manual compass calibration.
ALTA Pro does not Return-to-Land when commanded
Position Lock not achieved
Monitor the ALTA Pro QGroundControl to ensure position lock has been achieved with strong GPS signal
ALTA Pro wobbles when descending
Vertical descent into turbulent air from propellers
Descend at a slight angle relative to vertical so the ALTA Pro does not fly into turbulent air from propeller downwash