When upgrade the SCT Pro while*the Rx*wire is still in the receiver (at the throttle), please make sure that the receiver output is a neutral signal. If the*throttle signal is beyond the neutral, then the ESC will ignore the communication with the Program box, it*will only accept the signal from the Rx*wire.*(As a matter of fact, the priority*of the Rx wire is higher than the programming wire)
*
So, when upgradeing the ESC, there are 2 methods:
*
1. Disconnect the Rx wire from the receiver.
Or
2. Turn on the transmitter, make sure that the throttle stick is in neutral range. Connect the LCD program box to the program port of the ESC, and then turn on the ESC.