Section 37(3)(b) in The Delhi Metro Airport Express Line, General Rules, 2010
(b)in case of detection of an obstruction in between two Platform Screen door leaves of a Platform Screen door resulting in non closure of such door, the door makes three attempts to close automatically, if the obstacle is removed in these attempts Platform Screen door closes again, if obstacle is still present, then the Platform Screen door stops in unlocked position and is free to be pushed back by hand and once the obstruction disappears, train driver can open and close the doors again and if the problem persists, then, station staff shall attend the affected door.