Data > Elevator Safety Information  
     
Abnormal Stop of Elevator Code of Conducts if Passengers is Locked in
     
     
Abnormal Stop of Elevator
     
  Abnormal stop of elevator during operation is to protect the passengers inside the car safely.
     
  Elevator may cause injury to life if problem occurs since it vertically moves up and down.
     
  Elevator should be equipped with the device that protects the problem by itself.
     
  Example of fault detection device
    Governor that detects over-speed
Interlock switch that detects opening of elevator door during operation
Weighing device that detects the capacity limit
Open and Reverse Detector that detects the fault of power
End-point switch that detects the excessive operation at the top and bottom.
     
  Elevator control system has several other elements except above and has several functions.
   
- Detect over-current - Detect over-voltage - Detect fault of brake operation coil
- Detect operation in reverse direction - Detect fault of CPU operation
- Detect MOTOR STALL - Detect over-speed - Detect abnormal low-speed
- Detect fault of DOOR - Detect scroll - Detect overheating of INVERTER
- Detect SELECTOR deviation - Detect fault of DATA transmission
- Detect fault of speed detection device - Detect fault of position switch
- Detect TACHO JUMP - Detect fault of door switch - Detect fault of end-point switch
- Detect fault of condenser charging - Detect error of PATTERN, TACHO
- Detect fault of CONTACTOR contact point (Fault of ON) - Detect operation of TSD
     
    All these fault detection devices are designed to stop operation immediately in order to protect the
     life of passenger if the relevant part is detected to have fault.
Stop of elevator means that fault occurs in the system of elevator, indicating that inspection and
     repair are required to prevent accidents.
     
   
     
Code of Conducts if Passengers is Locked in
     
  Set passenger at ease through interphone in elevator
    Inform the passenger that there is no risk of falling of elevator or getting choked since air is ventilated to the elevator.
     
  Ask passenger not to try to open or get outside until they are rescued.
     
  Check the position of elevator
    Position indicator of monitoring panel
Position Indicator of platform
Go to the floor as displayed in the position indicator and check whether the elevator is actually
     located in the floor.
Since position indicator is turned off at the time of blackout, check it actually.
In addition, be careful since the elevator may stop at the floor different from that indicated in the
     position indicator.
     
  Turn off the main power of elevator and turn it on again to reset CPU if it is computer control type.
     
  Cut off the power.
     
  Open the platform door by half using the platform door key and check whether elevator is actually located.
     
  Open the car door manually if the car door is not opened.
     
  Make sure to rescue passengers by holding the hands if there is an empty space in the lower part of car.
    Passenger may fall down to the elevator path at the time of rescue.
Make sure to rescue passengers while the power is cut off, since elevator with unstable system
     may move even if the door is open.
     
  When it is difficult to rescue passengers since the elevator is get caught between floors.
    This task should not be done by persons except professional(employee of installation company)
     since it may cause risk of 2nd accident.
Move up to the machine room of elevator after conducting (1)(5).
Operate hoist manually so that elevator can be located in door zone of the nearest platform.
This task should be performed by over 2 trained personnel.
Stop the elevator at the position as is indicated in the main rope or governor rope.
The rescuer safely rescues the passengers in the platform.
It is desirable to wait until the repair company arrives since accident may occur if moving the car
     with manual handle.
     
  Manual Operation of Hoist
    Since this task may cause risk, it should be performed by experienced staff with skill training.
Do not perform this task at the no-gear type or Helical gear type since this task is possible only at
     the hoist gear with warm gear.
Make sure that power is cut off.
Ask the passenger to check whether car door is closed through interphone and to close if it is
     closed.
'Staff A' inserts the manual handle to the axis of motor and tightly holds it with two hands.
It is allowed to hold the fly wheel if it is attached at the axis of motor, but make sure to put on the
     gloves before holding.
'Staff B' puts the opening lever of electric brake and wait.
'Staff A' decides the rotation direction and signals "Open" to Staff B. Staff B repeats and shouts
     "Open", and opens the brake with lever.
'Staff A' carefully rotates the motor to the decided direction.
Be careful since it may rotate by itself due to the weight of car or balancing pendulum.
Change rotation direction reversibly if it does not operate in the decided direction.
If it moves a little, Staff A signals "Stop" and Staff B repeats "Stop" and loose hands to operate
     brake.
Staff A checks the stop position mark of main rope or governor rope.
Repeat until car comes to the stop position mark.
Take off the manual handle and open lever when it arrives at the position of platform.
     
    Resource < Korea Elevator Safety Association>