Failsafe Modes - UBSAN H216A X4 STAR PRO User Manual

Failsafe modes

Low power failsafe
When the aircraft battery is low, there is likely insufficient power to support the return of the
aircraft. Please land the aircraft immediately, otherwise the aircraft will fall and cause damage
to the aircraft and surrounding objects. To prevent this, the aircraft flight control will use flight
information to determine whether to perform a Return to Home or to land immediately.
Note: The aircraft will exit Return to Home if you move the joysticks. To continue the RTH, you
must manually reactivate the function.
Loss of flight control failsafe
When the flight control connection between the aircraft and transmitter is lost, the aircraft will
automatically land or return to where the remote control/transmitter was last located and land
there. This can drastically reduce the possibility of the aircraft crashing or being lost.
Conditions that may trigger a failsafe
(1) Transmitter is powered off.
(2) The flight distance exceeds the remote control's signal transmission range.
(3) There is an obstacle between the remote control and aircraft.
(4) The flight control or transmitter signal is interrupted by external electronic interference.
-To ensure the successful return of the aircraft if it loses flight control connection, users
must confirm that the aircraft has enough GPS satellites to fly safely in GPS mode. Users
must also be certain that the flight environment is clear enough for an emergency return and
landing.
-If the aircraft's GPS satellites drop below 6 for more than 20 seconds while the X4 is
returning to Home Point, the aircraft will automatically descend.
-The X4 cannot avoid obstacles automatically while in Failsafe mode. Users may set the
Return to Home height to avoid running the aircraft into obstructions.
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