When handling an elevator failure, elevator maintenance personnel generally judge the cause of the elevator failure by calling the elevator failure code, but the elevator failure code is often just the result of an elevator operation management system judging the abnormal operation of the elevator or the abnormal performance, and giving a maintenance direction , Cannot represent a deeper anomaly.

For example: an elevator displays a fault code, the meaning of the code is "main engine overcurrent", and the elevator protection crashes. This fault code does not directly indicate the point of failure, but only gives a maintenance direction of "main unit current is too large". The maintenance personnel need to judge whether the current detection equipment is broken, the main unit is running overloaded, the guide rail is poorly lubricated, or there is a strong current instantly Shock.

Here are some common failure phenomena:

1. The elevator stops at a certain floor without closing the door

Check the elevator light curtain, safety touch panel, door hanging plate or sill for foreign matter jam, door machine, door machine controller, door switch button, and fire switch.

2. The elevator can go on slow trains but not on express trains

Check the leveling sensor, host encoder, deceleration switch, and weighing device.

3. The elevator can't run fast or slow

Check the power supply, safety circuit, door lock circuit, and brake circuit.

4. The elevator stops running emergency and then resumes automatically

Check the gap between the door knife and the goal ball. It may be that the gap is too small, the elevator car shakes and hits the goal ball, causing the elevator to stop suddenly, or the shoe lining is too worn and the gap moves.

5. The elevator moves up and down, and the comfort is not good

Check the wear of the traction sheave groove, the tension of the wire rope, the main engine cushion, and the rope head bolts.

6. Elevator crashes, brake failure or overcurrent failure

Check whether the brake gap, shaft pin is well lubricated, and whether the electromagnet is working properly.

Summary: Elevator is a complete operating system, mechanical and electrical equipment that cooperates with each other. When dealing with faults, the operating conditions of the whole machine should be considered, rather than a single component. The purpose of this article is to "throw new ideas and attract jade", and hope that more elevator maintenance personnel will sum up their own maintenance experience and "make contributions" to the elevator industry.

For more information about passenger elevators, please continue to pay attention to Webstar Elevator Co., Ltd.