1. Check whether the plug of the inlet pipe inserted into the saline bag is blocked;
2. Check whether the liquid stop clamp is fully opened;
3. Check whether the high-pressure pipe is knotted, blocked or entangled;
4. Confirm that the saline bag is 0.6 meters above the main pump body interface vertically;

Hold the cutter head in a safe area, set the main unit's pressure setting to 14 and step on the foot switch to discharge the air in the water pipe until the jet stream continues to spray.

Note: After the cutter head is filled and drained, confirm that the pressure setting gear is the lowest gear to ensure that the flow of physiological saline is continuous. Do not wait for the saline bag to be emptied before replacing it.