A number of Multi-Point Locking Systems (MPLS) double lock once the door is the closed postion and the handle is lifted before turning the key.  There are different ways of locking these systems, but this guide refers to those that lock with the key once the handle has been lifted when the door is in the closed postion.

Sometimes, if the door has dropped or there has been a small amount of movement in the strucutre which the door frame is fixed to, users may find that the door becomes more difficult to close and lock, or it closes but the key will not turn fully once the handle is lifted, or it will not lock at all once the handle is lifted.

Often, this situation can be overcome by checking the throw of the deadlock, the latch, rollers and rhino hooks against the relative postion of the corresponding keep.  Make sure that they line up so that when the system is 'thrown' they all locate properly and evenly in the respective keep.  If you find that they do not line up then it may be that some minor adjustment is required.

Sometimes there will be adjustment on the hinges themselves, but often, particualry on older MPLS it will be necessary to re-sit or adjust the keeps as required.  Some keeps have adjusting screws, but most will need to be removed and completely re-fixed in line with the cxorresponding lock, latch, hook or roller.

It always worth checking this aspect before deciding to buy a new gearbox or system if you think it is faulty or broken as they can be expensive a opposed to a system adjustment.  For more information or queries then please contact us.