1. Failure: pump is not absorbent, pressure gauge violently beating. Reason: Perfusion is not enough water. There is air in the pump. Hoses and tubes leak. Solution: irrigation foot water. Check the pipeline to eliminate air leaks. 2. Fault: vacuum gauge indicates a high degree of vacuum, the pump is still not water. Cause: The bottom valve did not open or severely clogged. Suction pipe resistance. Suction height is too high. Solution: Check the end valve valve flexibility to get rid of the blockage. Try to make the suction pipe simple. Reduce water absorption height. 3 fault: exit pressure gauge indicates pressure, the pump water little or no water. Reason: the outlet pipe resistance. Turn wrong. Impeller clogged. Speed ​​is not enough. Solution: reduce tube resistance. Check motor rotation. Remove impeller blockage. Increase speed. 4. Fault: the flow is lower than the design flow. Cause: Impeller clogged. Seal ring gap wear too much. Speed ​​is not enough. Solution: Remove the blockage. Replace the seal ring. Increase the speed to the rating on the nameplate. 5. Failure: pump power consumption is too large. The reason: packing pressed too tight, packing room fever. Impeller wear. Pump water supply is too large. Solution: Relax packing gland. Replace the impeller. Close the gate valve to reduce the flow. 6. Malfunction: abnormal sound in the pump, the pump does not water. The reason: the suction pipe resistance is too large. Absorption height is too large. There is air into the suction pipe. The temperature of the liquid to be pumped is too high. Solution: Check whether there is blockage of suction pipe. Clean the bottom valve, lower the temperature of the liquid or lower the suction height. 7. Faults: pump vibration reasons: the shaft and the motor shaft is not the same heart. Impeller imbalance. Bearing clearance is too large. Solution: Align the pump with the motor to align the axis. Impeller through the balance test, unbalanced weight requirements in about 3 grams. Replace the bearing. 8. Failure: Bearing fever reasons: lack of oil bearing or oil viscosity is too large affect lubrication. Bearing wear gap is too large. Pump and motor do not mind. Solution: Come on. Change the oil or viscosity of small oil. Replace the bearing. Adjust pump and motor to ensure concentricity. 9. Malfunction: big noise Cause: The pump and motor installation are different. Pump or motor bearing wear, resulting in beating. Solution: adjust the pump and motor, to ensure concentric. Replace the new bearing.