Desktop engraving machine engraving machine | spindle cooling water does not flow

If the engraving machine spindle cooling water does not flow, what should we do? Advocate the elimination method: 1, check the cooling pump Is it right? Normal operation. 2, check the water pipes Is it right? Unimpeded, apart from the main pipe joint, by going from one side to the other side blowing. If not, please contact the manufacturer of harmonious processing skills!