Spektrum Surface Failsafe Tips

Spektrum surface radios include a signal loss failsafe, but do not have a voltage failsafe. You can use an aftermarket failsafe such as the Race Guard Micro Fail-Safe (DYN2553) to build in a voltage failsafe. The Race Guard will kick in when the voltage drops below 4.0 volts.

1. Plug your power switch lead, or ESC lead, into the Spektrum receiver. Press & hold the bind button on the receiver & power it up. This will put it into the binding mode & should be indicated by a rapidly flashing green light on the receiver.
2. Press the throttle trigger to the desired failsafe position & hold it. This is normally a full brake position. While holding the failsafe setting, press the clear button on the back of the transmitter & hold it down while turning on the transmitter. When the light on the receiver goes out, you can let go of everything.
3. Now that the radio & receiver are bound together, you can power everything off. Plug the Race Guard into your throttle channel on the receiver & then plug the throttle servo into the other end of the Race Guard.
4. Power everything back up again. While holding the transmitter in a full brake setting, you need to press the "setup" button on the Race Guard Failsafe, the light should then change to orange. Release the setup button & the light should go back to green.
5. Everything should be set up now. To test the function of the "loss of signal" failsafe, simply turn off your transmitter while the receiver is powered up. You should notice your throttle servo goes to a full brake position. To test the function of your voltage failsafe, you will have to let the battery pack get lower than 4 volts, at which point you should see it go into failsafe & then the light on the Race Guard should change to a solid red color.