What if the elevator is broken？电梯Maintenance we can see what the common concentration possibilities are。
      1. The elevator doors do not open and close properly。
      ① Control circuit fuse 1RD, 2RD or door motor circuit fuse 11RD is too loose or may have blown, need to be tightened or replaced with a new one;
      ② door drive belt slip, need to replace the belt;
      (3) The portal motor DM is damaged, the DC voltage between M3 and M4 is 110V with a multimeter, and the portal motor does not turn, indicating that the motor is damaged and should be repaired or replaced;
      ④ Door resistance RMD broken wire, replace the resistance RMD;
      ⑤ Door motor circuit individual connection endpoint (M1 or M2 or M3 or M4) loose off, tighten to make the line smooth;
      ⑥ In the base station with the key can not open and close the door normally, if 22, 24 points short connection,电梯Close the door or short connect 22 and 32, and the elevator opens the door, indicating that the key switch outside the hall is in poor contact or has been blown
      2. When the elevator arrives, it doesn't open。
      ① The two-level door opening limit switch is 2KM damaged, so that the door opening relay JKM can not get electricity, and the elevator can not open the door。38, 01 check to confirm that it can open the door, indicating that 2KM is damaged and 2KM should be replaced;
      ② The permanent magnet relay in the open door area is damaged, so that the open door control relay JMQ can not draw, its normally open contact is still disconnected, the relay JKM can not get power, but can not open the door, replace the permanent magnet relay in the open door area。
      3. Press the close button, the door is not closed。
      ① The AGM contact of the closing button is poor or damaged, short connect to two points 23, 24 inspection and determination, and then repair or replace;
      ② The three-level door closing limit switch 3GM is damaged, so that the door closing relay JGM can not get electricity,电梯Can not close the door, short 28, 01 two point inspection determination, can close the door, indicating that 3GM is damaged, should be replaced by 3GM;
      ③ The starting door opening relay 1JQ is damaged, but the normally open contact 1JQ is still disconnected, JGM can not get power, so it can not close the door, should be replaced by relay 1JQ。
      The above content comes from the Internet, if there is infringement, please contact to delete。