There will be many problems during using construction hoist material lift, which will bring a lot of trouble to the construction personnel.
The following is a summary of some common malfunctions:
(1) Protection switch Q1 trips, protection switch F1,F2,F3 trips.
(2) Electric power supply normally, but the contactor does not act. The operation switch is placed in the upstream and downstream position, contactor does not response or release delay, it is easy to break. Frequency converter is power off, the building hoist material lift can not run.
(3) The hoisting cage vibrates when running, and bounces when starting or stopping. The descending distance is too long when the cage is braking. The hanging cage runs up and down with self-stopping phenomenon. Limit bump does not stop when it touches limit switch when the hanging cage runs up or down.
(4) Reducer is leaking oil, reducer worm wheel wear fast, reducer has abnormal noise, reducer output shaft does not run, but the motor is rotating.
How to maintain building hoist passenger lift, the measures as below:
(1) Inspect and maintain before and after daily operation. If there is any problem, it should be timely handled.
(2) Check and ensure that the rollers are fastened, and bolts of rack backrest and transmission bottom plate are not deformed and loose.
(3) Test function of all limit switches, emergency switch and circuit switch whether they are work normally.
(4) Check whether the brake is working sensitively, no noise and overheating in using.
(5) Check the function of leakage protector, ground protector, and external distribution box without welding machine loaded.
(6) Check that all connecting screws of guide way derrick structure should be tight without deformation and welding joint fracture.
(7) Inspect and maintain rack gear, wire rope and frequency control device regularly.