1 if the power switch on the light does not shine: may be a fuse fuse, replacing the fuse; another is the emergency switch is not open.

2 stroke not: a trip may be counter bad, need to be replaced; another is the trip counter too much dust, clean the dust.

3 knife hit the left side plate: a possible left travel light switch is bad, need to be replaced; another is Zuo Hangcheng switch too much dust, clean the dust.

4 knife hit the right side plate: a possible right travel light switch is bad, need to be replaced; another is right travel switch too much dust, clean the dust.

5 motor rotation, the knife does not turn: loose coupling screw, open shell, tightening the screw.