Hi Ching, i had the same problem on my 150A esc before, try set your esc voltage protaction to 3.2 or 3.4V per cell but i suggest you to set your radio control count down timming to 11mins - maximum 13 mins (Use your phone if your radio system didn't came with this function)... your batteries voltage should be 7.4 to 7.6V after the run. 3.2 or 3.4V is too low for the batteries.
You can also download their ESC setup software from their site or borrow it from your friend for easy set up your esc.
C hing, do you know how to send it back? I bought it from chi lok.
Try give Chi Lok a call and see if they willing to send it back for you then bring it to them, normally shops do provide this service but only some do. More convenience this way.
Or send it back your self, should take about 2-4 weeks.
