Fault phenomenon Analysis and troubleshooting Start capacitor damage 1. Use voltage is too low, the motor starting time exceeds the limit, the capacitor overheating and blasting 2. Pump for some reason blocked, can not start, causing damage to the capacitor 1. Replace the capacitor, such as Capacitor explosion, liquid leakage, you need to be cleaned 2. Determine the cause of pump blocking and eliminate it, and then replace the capacitor and clear the liquid leakage of the centrifugal switch damage 1. Centrifugal switch floor contact spring break; floor contact Reed on the rivets wear or fall off, resulting in the centrifugal bakelite active sets and contact with the reed rub; Centrifugal bakelite active sets broken; contact reed on the moving contact or the fixed contact on the floor off 2. Centrifugal switch Of the contacts due to frequent arc oxidation, resulting in poor contact or electric shock contact 1. Replace the centrifugal switch. When replacing the base plate, open the end cover and inner cover. When replacing the centrifuge, first pull the bearings and the centrifuge support with the bearing pins and press into the new centrifuge 2. Gently rub the oxide layer on the head with metallographic sandpaper and wipe the thermal protector with alcohol Damage to the pump overheating caused thermal protector action, so the electric pump cooling off, and later connected to the thermal protector, pump and overload operation, and again and again about ten minutes, eventually leading to damage to the thermal protector, which Further burn the motor windings timely check the cause of the pump overload and clear it, and then overhaul or replace the thermal protection Submersible pump vibration and noise during operation 1. motor or pump bearing wear, the shaft swing in the bearing, Or shaft bending caused by partial wear. Ammeter reading increases, the pointer violent swing 2. Impeller tighten the nut loose, the impeller and diversion shell collide or friction 3. Thrust bearing wear, the impeller front cover and diversion shell friction, ammeter pointer violent swing 4. Motor Rotor or pump impeller itself balancing failure 1. Immediate shutdown, hoisting the pump to replace the bearing or straightening shaft 2. Stop, hoist the pump, tighten the impeller nut 3. Replace the thrust bearing or thrust plate; impeller wear serious at the same time Replace the impeller 4. Remove the motor rotor or impeller for dynamic and static balance test and handle until balance, and then re-install
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