KONE Maintenance Method
MX10 / MX20 MCP Procedures - ASME A17.1-2013 / CSA B44-13
© 2014 KONE Corporation PSK8-604-MX10/MX20
All rights reserved.
51 (-) 2014-12-15
AMD Hoistway door interlocks: Maintenance procedures
Procedures
Refer to the drawings on the previous page while performing these procedures.
Check interlock circuit integrity
• Open a landing door and attempt to move the elevator downward (block the door open, if
necessary). The elevator should not move.
Check mechanical function of the interlock
Check the lock function (Note! The lock is not adjustable)
• Check the latching/locking mechanism for proper alignment and function. Ensure the locked
door and door contacts do not open when the door is pushed or pulled by hand.
Check to ensure:
− The lock hook and peak overlap when contact operates must be a minimum of 7 mm.
− The contact bridge should push the door contact surface a minimum of 3 mm.
− Play between lock hook and lock beak should be 2 mm (nominal).
Clean the interlock contacts
• Clean the interlock contacts. Check for pitting, burning or excessive wear. Replace the
contacts, as required.
•
Check for proper contact
separation when the hook lifts.
• Clean the shorting bar contact surface.
8.6.4.13.1 (e): Hoistway door unlocking devices and escutcheons
Procedures
Ensure the function of emergency opening device:
• The lock can be opened using the emergency opening key.
• The lock returns to closed position by itself after an emergency opening.
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