Missing ESC configuration APM 2.8 F550

Hi Guys,
I started to assembly DJI F550, this is my first assembling drone.
I am having doubts about ESC configuration.
I did the ESCs limits configuration, but when i turn off the drone battery, i need to configure again the ESCs limits and the ESCs emits a continuous sound every 3 seconds.

  • ESCs model: RCTimer 30A OPTO Brushless SimonK Firmware
  • Rcmodelpart APM2.8 Flight Controller + CRIUS NEO-7M GPS Module + Power Module APM2.6 Updated
  • RAdio Flysky FS I6S 10ch 2.4G
  • Flysky FS-iA10B 10CH Receiver
  • Hensych Lion Power 4s 14.8V 5200MAH 30C Lipo battery For RC Car Helicopter 6 Channel

If someone know something about that situation, please help me.
Thank you

Sergio