Maintenance, Repair and Troubleshooting
Airspeed
malfunction
The differential pressure sensor used to measure air-
speed is registering invalid values. This may be due
to a damaged sensor or to a clogged pitot probe.
Security action: The drone flies towards the Home
waypoint at an altitude defined by the Home way-
point’s Change altitude parameter (by default, set to
‘Highest’) at a constant thrust value instead of con-
trolled speed, potentially resulting in low or high
flight speeds depending on wind. Once it reaches the
Home waypoint it initiates a landing procedure.
User action: Try to provide a maximum amount of
approach sectors to ensure that the drone can land
against the direction of the wind. Land as soon as
possible and perform Check 4 in section ‘Full airframe
and sensor inspection’ on page 131.
Low airspeed Detected airspeed is unusually low or close to zero.
This may be due to a collision with the ground or a
clogged airspeed sensor.
Security action: The drone shuts off its motor and
tries to continue its mission.
User action: If the warning is due to a clogged air-
speed sensor it may be due to moisture in the air.
Try commanding the drone to descend closer to the
ground and out of any cloud cover.
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