DJI Phantom FC40 - Manual (Page 13)

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Power Indicator Status Information
Power indicator Sound Transmitter State
None Functioning normally.
None Establishing a link between the transmitter and the receiver.
B-B-B…… Low voltage (at 3.9V-4.5V), should replace the batteries immediately.
BBBB
Low voltage (lower than 3.9V). The transmitter will automatically power off.
Batteries should be replaced immediately.
B-B-B……
The transmitter will give a visual indication of an alarm after 15 minutes of
non-operation. The alarm status will disappear once you start operation of the
transmitter.
The transmitter will blink the LED and sound an alert when the voltage drops below 3.9V and automatically
power off after 3 seconds.
6.
Powering on the Aircraft
1. Place aircraft on the ground
2. Open battery compartment cover of the aircraft.
3. Put battery into the compartment with the power cord facing outward.
4. Connect battery and aircraft by the power lead and make sure the ESCs work properly. (Correct sound)
5. Keep all sticks of the transmitter and the aircraft stationary until the system start and self-check has finished
( ).
6. Put power cable into the battery compartment.
7. Close battery compartment cover.
8. LED flight indicator may blink Yellow 4 times quickly ( ). Start motor is disabled during LED flight indicator
blinking Yellow 4 times quickly ( ), as the system is warming up.
ESC Sound
Sound ESC State
1234567 Ready
BBBBBB… Throttle stick is not at bottom
B--------B--------B… Input signal abnormal
BB---BB---BB---BB… Input voltage abnormal
(1) Contact your dealer if the “System start and self-check LED flashes” are not correct (LED flight