Pump is activated when the electric pump is running, the rotation should be smooth and free of vibration and abnormal noise, observe whether significant fluctuations around the motor running current and line voltage start. After the motor main circuit is energized, the motor does not rotate if found, should be shut down immediately to prevent long power motor stuck and burned. Note that for the first time after installation or repair of pumps in operation, when the test machine can only start in place after the water pump abnormality if found, should be immediately shut down, check the direction of rotation is correct, if installed properly, find the cause and put into operation before troubleshooting. Due to the motor windings burned causing rewind pump, first put into operation after a few hours, you can stop measuring thermal insulation resistance should be not less than 0.38M12 to continue. Should not be open when the pump is running stops too frequently; the number of starts per hour is generally not more than six times, and requires evenly spaced. After 300 hours use of a new water pump,all butter oil in the bearing box should be replaced with new oil.