I'm using the JS-2 manual which I downloaded from Tamiya USA's website that provides a troubleshooting guide at the end of the PDF. Its that little booklet that comes which each kit and details the electronics features: https://www.tamiyausa.com/pdf/manuals/56035ml.pdf

On page 47 of the PDF, there is a table that decodes what each set of blinking lights does.

Two blinking green lights indicate incorrect wiring of motor, reverse switch position is incorrect, or the controller is set incorrectly.

Two solid orange lights indicate that there is too much electric current for the motor.

What I interpret that to mean is that there is possibly a short in your motors somewhere, and after a while, the system goes into safe mode to prevent damage. I hope that helps.