| Mode/Status | LED Status | Description |
| Power Off | LED off | Transmitter is not powered on |
| Binding Mode | LED fast flashing | Transmitter is in binding mode |
| Low Voltage Alarm | LED slow flashing | Battery voltage is below 4.2V |
| Idle Alarm | LED breathing flash | Transmitter has been idle for over 10 minutes |
| Standby Mode | LED three flashes, one off | Bound receiver is turned off or no signal |
| Drag Brake Adjustment Mode | LED two flashes, one off | Entered by quickly pressing the REV button twice |
| Servo Trim Mode | LED two flashes, one off |
Entered by quickly pressing the BIND button twice |
Usage Instructions:
- Binding Mode: Used to pair the transmitter with the receiver.
- Low Voltage Alarm: Alerts the user that the battery voltage is low and needs to be replaced or recharged.
- Idle Alarm: If the transmitter is idle for over 10 minutes, it enters power-saving mode.
- Standby Mode: The transmitter is in standby mode, waiting for the receiver signal.
- Drag Brake Adjustment Mode: Entered by quickly pressing the REV button twice, indicated by LED two flashes, one off, used to adjust the drag brake function. Exit by pressing the REV button twice again.
- Transmission Servo Trim Mode: Entered by quickly pressing the BIND button twice, indicated by LED two flashes, one off, used to adjust the servo trim. Exit by pressing the REV button twice again.
Hope this overview helps to understand the LED status indicators on their FCX24 transmitter.
FMS Official website：https://www.fmshobby.com
FMS Customer Service Hotline：(+1) 8504480101
FMS Service Email：support@fmsmodel.com
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