Brushless Pump / Strange Noises / Doesn't Turn On / Slow

What’s wrong with my Brushless pump, it makes strange noises when I turn it on, or it doesn’t
turn on right away, or seems to start and come up to speed slower than my brush style pump
when power is applied?

The startup sequence of a brushless motor differs from conventional brush-style motors and may seem unusual. Since there’s no direct contact between the rotor and stator, the controller first sends pulses to locate the stator position before initiating the correct startup sequence. This process may produce audible beeps or clicks, followed by a sweeping startup as the motor ramps up to full speed.