How can the pump be stationary?
1, the pump bearing lubrication interruption, bearing burn.2, locking the rotor is jam.3, foreign body corrosion serious impeller lock.
Rusty, turn with your hands to see the situation, the two bearings filled with lubricating oil.
1, the pump can move under the premise of turning disc. Pump should be empty load start, that is, in the closing of the export valve in the state of start, there will be no rotation of the situation.2, look at the voltage of the circuit is normal, whether the lack of phase.
