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                                                                                            FrSky Electronic Co., Ltd
                 Website:www.frsky-rc.com                      E-mail:[email protected]                       Technical Support: [email protected] 

www.frsky-rc.com

FrSky 2.4GHz ACCST X4R/X4R-SB CPPM Manual

Failsafe is a useful feature in which all controls move to a preset position whenever the control signal is lost for a 

period of time. X4R supports failsafe function for all channels. Follow the steps below to set failsafe positions for 

each channel:

1.  Bind the receiver first and turn on both the transmitter and the receiver;

2.  Move the controls to the desired failsafe position for all channels;

3.  Press briefly the F/S button on the receiver (less than 1 second). The Green LED will flash twice, indicating the 

failsafe position has been set in the receiver. 

To disable the failsafe function, re-bind the receiver.

Failsafe is recommended to set when system is firstly used, or receiver has been re-bound. Follow steps below to 

set failsafe.

Option-1: 

How to set failsafe to a user-determined state on lost signal:

1) Bind the receiver to the transmitter module first and turn on both the transmitter and the receiver;

2) Move the controls to desired failsafe position for all channels;

3) Press briefly the F/S button on the receiver and you are done.

Option-2:

 How to set failsafe for no pulses on lost signal:

1) Turn off the transmitter, power on the receiver, and then press briefly the F/S button on the receiver.

Note: If failsafe is not set, failsafe default will hold last position before signal is lost. In this case, there 

exists risk that your model will fly away or cause injury.

                                                                                            FrSky Electronic Co., Ltd
                 Website:www.frsky-rc.com                      E-mail:[email protected]                       Technical Support: [email protected] 

www.frsky-rc.com

How to connect Smart Port enabled sensors and/or FBVS-01 to X4R/X4RSB 

Smart Port enabled sensors and X4R/X4RSB

FBVS-01 and X4R/X4RSB

     Note: refer to the above picture and charts for the correct connection. Use the heat shrink tube on the

               exposed wires to prevent accidental in-flight short circuit.

Smart Port Cable

Yellow

Red

Black

FBVS-01

Red

Black

X4R/X4RSB Cable

White

Black

X4R/X4RSB Cable

Green/Yellow

Red

Black

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For more details, please check the complete manual for X4R from www.frsky-rc.com - Download -Manual.

Should you have other questions, please send e-mails to FrSky technical support [email protected].

Failsafe

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