Problem in rotating thrusters with jetson board

Hi,
I am using Jetson nano and PCA9685 to control Bluerobotics ESC. I am hearing 3 beep sound but Thruster not rotating
My code:

from adafruit_servokit import ServoKit
from time import sleep

kit = ServoKit(channels=16)
kit.continuous_servo[1].throttle = 0
sleep(15)

while True:
kit.continuous_servo[1].throttle = 1
sleep(10)
kit.continuous_servo[1].throttle = -1
sleep(15)

Some times after few cycle in that loop completes Thruster rotating forward and it is stopping it doesn’t rotating properly only beep sound i am hearing.

https://drive.google.com/a/bitsathy.ac.in/file/d/14RhYxI-8hDU6Le1ulszmJ62Zf24chnvr/view?usp=drivesdk