Reasons For Mitsubishi Elevator Crash

Reasons for Elevator Crash
1. The door switch is not in place properly.
2. Poor control box substrate or poor display board inside the car.
3. The distance between the deceleration switch is incorrect; Or the switch itself is not good (internal contacts are broken). (Sometimes it's easy to drive at a slow speed, sometimes it's hard to drive, so you must be careful).
4. The base transformer is not good. (Automatic recovery after emergency stop during operation or crash after leveling)
5. The driver board is not good or the driver program block on the driver board itself is not good or the program is not good.
6. The steel wire rope slips more than 16 times and freezes. (Crash after emergency stop or returning to leveling)
7. Caused by poor contact between the main lines (including the user's lower part)
8. The plug of the driver board is not good, causing it to crash during emergency stop or leveling.
9. Poor performance of the driver module (crashes after slowly leveling)
10. The brake contact is not good.
11. There is resistance in the safety circuit (but the light is on, not running or emergency stop)
12. The door lock circuit has resistance (but the light is on, not running or emergency stop)
13. Poor data overload (crash after leveling or emergency stop before reaching the destination level)
14. Poor performance of the overloaded board (crashes after leveling)
15. If the braking force is set too high or too low, it will crash
16. Poor regeneration resistance (poor contact or disconnection)
17. The interface between P1 board and W1 board has poor contact and freezes (after turning off and powering on for a while, it freezes again)
18. The leveling sensor is not functioning properly (the fast train crashes after leveling)
19. The leveling sensor is not functioning properly (the fast train crashes after leveling)
20. Flat cable interference (crash after leveling)
21. Inverter freezes due to high temperature (it will freeze instantly after leveling, and recover in the blink of an eye)
22. Poor encoder performance
23. Poor grounding system
24.5 # Contactor feedback signal is not good
25. The feedback signal of LB contactor is not good
26. Poor contact of emergency power identification contacts (NORR contactor not engaged)
27. Poor contact of the main fuse leads to emergency stop phenomenon
28. There is too much dust on the printing board, and the weather is humid, which can cause the electric circuit to crash (wash it clean with alcohol and blow dry it)
29. Poor welding and contact of the encoder tail plug (occasional crash or emergency stop returning to the leveling layer, sometimes not returning to the leveling layer)
30. Poor contact of the safety touch panel (GPS-3) (cannot be activated after leveling, but the brake is open, and it will not return to leveling even in the middle layer)
31. The program block itself has poor performance
32. Emergency stop due to poor overload data
33. If the wire contact between the brake spark arrester and the contactor is poor, it will crash (crash after leveling)
34. The regeneration module has poor performance and crashes
35. The main charging capacitor crashes due to insufficient capacity (sometimes cannot be turned on)
36. Poor contact of the resistor for instantaneous protection of the main charging capacitor during charging (freezing or burning of the charging capacitor after leveling)
37. The transformer plug or itself is not easy to cause (it is difficult to drive both fast and slow)
38. The main wire output from the control screen to the host was mistakenly threaded in the eyes of the transformer and crashed (both fast and slow cars crashed)
39. Regenerative resistor configuration error, running in one direction to the upper or lower full load and crashing
40. The driver board itself is not easy to crash
41. There is a slight short circuit inside the base transformer, causing an upstream crash and overvoltage