The motor cannot start

① Is the power supply voltage normal: test with an instrument or probe.

② Does the empty card in the electric box jump down: If the empty card jumps

down, check whether the circuit is short-circuited before pushing it up.

③ Is the AC contactor damaged: Check whether the contacts are damaged

and whether the contactor is normally attracted.

④ Up and down travel switch: Loosen the outer cover to check the contacts

and readjust them.

⑤ Is the overload protector disengaged: Automatically recombined after

cooling, check whether the motor is hot