The counter which indicates the total starting times of hoisting and lowering is useful for maintenance of the consumable parts like electromagnetic contactors, wire rope and brake solenoid, etc.
Erroneous operation can be prevented.
When the load block has reached the upper limit, the control circuit of the electro-magnetic switch is turned off and the operation is stopped. Should the circuit be short-circuited and the load block be moved further upward, the motor main circuit is cut off.
Clamp method of the control box cover facilitates opening and closing.