Hello Saba7k,
It seems that the pump was blocked by the bubbles.
Please open one fitting on the top of the distribution plate, and exhaust the water from the bottom by BPTA-EFW-GS fitting, make the water circulation to remove the bubbles. When the pump works normally, fill the distribution plate nearly full or turn the pump speed down by PWM function. It helps to make the noise down.
Any question, feel free to contact us.