|no||trouble||cause||what to do|
|1||motor fails to start||
2.stator winding failure
3.motor may be overloaded
2.check windings short circuit or broken.
3.choose a larger motor or reduce load. clear the fault of driving equipments
|2||low speed with load||
1. voltage is too low.
1.check voltage for motor’s terminals.
2.choose a larger motor or reduce load.
1.confusing the wiring of power line and earthing.
2.insulation moistered or aged.
3.connection between lead and enclosure.
1.correct the wiring.
2.drying or replace winding.
3.check lead and enclosure and insulate them.
|4||abnormal noise in running||
1.motor runs with no phase.
2.bearing is damaged or lack of oil.
3.stator and rotor rub.
1.check electric connection to clear the failure of no phase.
2.change bearing or grease.
3.check the stator bore, clean the sundries if there is.
1.motor or loaded installation is loose. 2
2.coupling or belt pulley is off center or is unbalanced.
3.the shaft extension gets bent after being hit.
1.check and fasten the foot bolts.
2. align central points or rebalance.
3.change rotor or shaft
3.misalignment between motor and driven machine shafts.
4.friction between bearing and bearing house or shaft.
1.replace the damaged bearing.
2.changing grease, and the grease takes
3.up 1/2~2/3. 3. adjust belt tension or align couplings.
4.replace the damaged end-shield,
5.shaft or rotor. 5. re-assembly motor.
|7||high temperature rising or faming||
2.ambient temperature is too high.
3.supply voltage is too high or too low.
4.motor runs with 2 phase.
5.airways are blocked.
1.choose a larger motor or reduce the load.
2.lower the ambient temperature or reduce the load.
3.confirm the reason, and reduce the load or shut off the machine.
4.check the electric connection, and clear the failure of lacking of phase.
5.clean the sundries at the inlet and outlet.