1. May be due to the fire pump is not water, or there is no appropriate exhaust. That can be adopted in this case elimination measures is to carefully check the fire pump shell is filled with the liquid, and check the inlet pipeline whether to live full of liquid.
2. Because the speed is too low and caused, this case need to check whether the motor wiring error, normal voltage or not, and so on.
3. Due to the fire pump system caused by too high head, this situation will need to check the position of the system head, to consider whether the friction caused by the loss.
4. Fire pump suction is too high, this situation will need to check the existing net head.
5. The impeller or pipeline is blocked, this case need to check if there are obstacles exist.
6. The direction of the fire pump is not correct. In this case, it is necessary to check the direction of rotation of the fire pump.
7. Entrance pipeline leakage, the need to check whether the pipeline entrance there is cavitation generated leakage.
8. The fire pump valve size, valve at the end of this case to check the installation of the correct size can be solved.
9. Fire pump impeller between the gap is too large, this case, the need to check whether the clearance size of the impeller is correct.
10.Fire pump impeller damaged, this case need to check whether the normal impeller, if there is damage to the need for timely repair or replacement.
