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(2) It is difficult to start or not start, and it is accompanied by a "beep" sound. During maintenance, the blade can be quickly moved in the direction of running. If the motor runs quickly, it indicates that the starting capacitor or the starting winding is damaged. Replace the capacitor of the same capacity or repair the starting winding. If the motor is issued, most of the motor and pump head Mechanical failures such as bearing damage, impeller stuck, etc.
(3) The motor can run, but the speed is slow, and the casing is overheated and has a burnt odor. Most of them are caused by short-circuiting of the motor windings. The motor should be disassembled and repaired by means of welding, jumper, isolation and rewinding.
(4) The noise is large and the vibration is large during operation. Most of them are bearing damage or the bearing and the casing are not properly matched. It is necessary to disassemble the motor for inspection. If the bearing is damaged, it should be replaced. If the bearing is “running outside the circleâ€, the matching surface of the pump casing can be treated with stencil; if the bearing is “running inside†"Circle", which can be used for the wear of the motor shaft, and the wear is severe. It is repaired by the method of turning after welding.
2. The pump head part (1) The motor runs normally but the water output is small or no water is produced at all. In this case, first check the seal of the water pump. When checking, first unplug the power plug, block the suction port with your hand, fill the water pump with water, use the mouth to hold the outlet and blow it inward to see if the pump head is leaking or leaking. The point is where the seal is damaged. Common fault areas include suction pad, water outlet pad, and impeller cover pad, which should be replaced during maintenance. If there is no full water phenomenon, the impeller is damaged, the water in the water absorption chamber and the water outlet chamber is eroded, the pump head water is blocked, the impeller and the pump casing are increased, and the impeller and the pump casing should be replaced. . When replacing the wheel, care should be taken to completely remove the residual copper blades in the pump to avoid damage to the new impeller again.
(2) The case is charged. Most of them are caused by water seal damage and water penetration into the motor through the motor shaft to deteriorate the insulation performance of the motor. It can be repaired by replacing the water seal and drying the motor. It should be noted that because the pump is in contact with water for a long time and working in the open air, it is highly susceptible to moisture and the insulation performance is deteriorated. In order to ensure personal safety, the electric self-priming pump should be grounded reliably; in winter, the water in the casing and the warmth should be adopted. In order to prevent freezing of the casing.
Common faults and maintenance of two parts of micro electric self-priming pump
1. The motor part (1) has no response after the power is turned on. Most are caused by a power plug, a power lead, and a motor winding open.