Power capacitor must be installed.  Every Xrotor 45amp 4-1 includes 2 power capacitors. One larger, and one smaller.   The larger capacitor should be used for 5s-6s lipo, the smaller capacitor can be installed for 4s-5s lipo directly on the PCB (ESC), not by a power plug.  Failure to use the included power capacitors will result in damage to your ESC.

BL_Heli_32 ESC settings can cause damage. Default settings should be used.

Motor KV ratings and prop size/pitch combinations recommendations.
– 4s Lipo using 5 inch props up to 2700KV
– 5s using 5 inch props, up to 2450 KV
– 6s using 5 inch props up to 1750 KV