Diving cooler pumps are easy to use and low in installation costs, and are widely welcomed by users. Although diving cooler pumps are easy to use, they often have operational failures.

(1) Cut off the power supply and pull the diving cooler pump ashore from the water, check whether the impeller is entangled or stuck by foreign objects, the motor cannot rotate and the current increases and heats up.

(2) If there is no foreign matter entanglement, is the rotating impeller flexible? (It is impossible to rotate the diving cooler pump impeller as flexibly as a general motor, and it can turn multiple times with force. The diving cooler pump can rotate because the seal is tight.)

(3) If it does not turn when it is turned, it is likely that the rotor bearing is damaged. If the rotor of the motor is swept, the bearings should be replaced, and both disc bearings should be replaced at the same time.

(4) Open the junction box and check whether the contact of the three motor lead wires is firmly pressed, and then use the multimeter ohm RX1 to measure whether the three-phase winding is normal. If one of the three phases is disconnected from the other two phases, it means that the motor is damaged, and the current increases. Do not let the water.