KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
77 (-) 2014-12-15
Category 1 testing of door closing force (AMD 2.0)
The force necessary to prevent closing of the hoistway door (or the car door or gate if power
operated) from rest shall not exceed 30 lbs. This force shall be measured on the leading edge of the
door with the door at any point between one third and two thirds of its travel.
To prevent doors from reopening when close force limit is reached, disconnect wire from AMD 2.0
terminal X1/31 (Reopen) and temporarily connect it to X1/G.
Do not attempt to measure the force of a moving door, stop it first! Closing force of the door must be
measured from a door at rest.
1) Stall the door at midpoint of travel in the closing direction.
2) Put a force measuring device against the leading edge of the door (part # 45371: see picture of
device below).
3) Back off gauge until door starts moving. Read pounds of force on gauge and record the
measurement.
4) Adjust potentiometer R161 labeled CLOSE FORCE to measure no more than 30 lbs of force.
Closing force does not need to be exactly 30 lbs however, it shall not exceed 30 lbs.
5) Clockwise rotation of R161 increases closing force
6) Counterclockwise rotation of R161 decreases closing force
7) Repeat steps 1-5 until proper closing force is achieved.
8) When adjustment is complete reconnect wire that was earlier removed from AMD 2.0 terminal
X1/31 (Reopen) and connected to X1/G.
9) Before placing car in service test close force limit by stalling doors while they are closing.
Door(s) must reopen when stalled.
NOTE! Do not allow the door to strike the scale with an impact. A false reading could result.
If the elevator was installed under the A17.1-2000/B44 or later code, or has a door operator data
plate containing this information, verify that the closing time in the code zone is not less than the
minimum time shown on the data plate.
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