First thing I'd look at is if the BEC is connected to the RX as RCjetdude said - if there are no dedicated battery pins, it can be connected to any unused channel, or the bind pins (assuming the RX has already been bound to the transmitter). Or if all are used, use a Y-cable - for example, the BEC connecter and throttle connector share the same channel. If you are using the MCB-E, aka "Blue Box", you can plug the BEC into an unused channel there, too, like the AUX throttle.
Then I'd see if the connector is plugged incorrectly (reversed) in the receiver.
If the TX lights up but it still beeps, sounds like the ESC endpoints need to be calibrated. With most ESC's the steps are:
Then I'd see if the connector is plugged incorrectly (reversed) in the receiver.
If the TX lights up but it still beeps, sounds like the ESC endpoints need to be calibrated. With most ESC's the steps are:
- Turn on transmitter. Set throttle to high.
- Plug battery to power the plane. After the ESC's first beep(s), reduce the transmitter throttle to zero.
- The ESC will restart, beeping the battery cell count.









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