The motor operates normally but produces little or no water.This situation should first check the seal of the pump, check should first pull out the power plug, hand blocked the suction port, the pump filled with water, with the mouth hold the outlet hard into the air, observe whether the pump head leakage, leakage is seal damage. Common fault parts are suction port pad, water outlet pad, impeller cover pad, maintenance should be replaced.If there is no full water phenomenon, it is mostly impeller damage, water between the suction chamber and the outlet chamber of the water retaining internal corrosion, pump head water retaining wear, impeller and pump shell clearance increase, should replace the impeller and pump shell.Fu wheel replacement should pay attention to the complete removal of residual copper pump blade, so as not to damage the new impeller.
The casing is charged.Most of them are caused by the damage of water seal and the deterioration of insulation performance caused by water seeping into the motor through the motor shaft.It can be repaired by replacing water seal and drying motor.It should be noted that because the pump has been in contact with water for a long time and works in the open air, it is easy to be affected by moisture and deteriorate the insulation performance. In order to ensure personal safety, the electric self-priming pump should be reliably grounded;Winter should be used to drain the inside of the case of water and heat preservation measures to prevent freezing damage to the shell.