+ After the angle grinder is connected to electricity, there is abnormal noise and does not rotate or rotates very slowly
1. The switch contacts are burned out, and the switch needs to be repaired or replaced.
2. If the mechanical part is stuck, check the mechanical part and correct it in time.
+ The motor does not run after the angle grinder is connected
1. The power supply may be cut off, and the power supply should be repaired immediately.
2. It may be that the joints are loose. Check whether all joints are in good condition.
3. If the switch is in poor contact or does not work, repair or replace the switch in time.
4. The brush does not touch the surface of the commutator, so replace the carbon brush.
