Futaba GY701 - Manual (Page 29)

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Input error
Gyro
This indicates no rudder or throttle signal input.
The GY701 does not work in this condition.
Sensor error
Gyro
The gyro sensor is not working. The gyro does not
work in this condition.
Low battery
It displays as the battery voltage becomes less
than 3.8 v. If low battery is recognized for more
than 1 second, the governor goes info low battery
condition and the governor operation is stopped.
If the B/FS function is activated, the throttle servo
is moved to setting position by B/FS function. The
B/FS condition is reset for 30 seconds by moving
the throttle stick to low full. Throttle servo can be
controlled by stick. After 30 seconds have passed,
you can go into B/FS condition again. This se-
quence lasts indefinitely. The helicopter should be
landed immediately if B/FS is active.