Kaba ILCO FDU User Manual page 233

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Chapter 11
The mortise is malfunctioning.
Solutions:
Make sure that the latch is not rubbing against the mortise faceplate. Remove the
plate and verify the latch movement.
Verify the mortise bevel angle (see the lock installation instructions). If the latch
moves freely when the plate is removed, replace the mortise face plate by using
the thrown deadbolt as a guide. If the latch binds when the front plate is
removed, try to readjust the mortise's bevel angle. If the mortise still binds,
remove it from the door. If the latch binds when it is removed from the door,
replace the mortise. If the latch does not bind while it is removed, then use a
wood chisel to enlarge the cutout.
Problem:
4) The latch does not move freely.
Possible causes:
The lock's anti-friction mechanism is broken.
Solutions:
Depress the auxiliary latch (lowest of the three bolts or latches on the mortise).
The latch bolt, including the anti-friction, should be dead latched. If not, the
mechanism is broken. Change the mortise.
Problem:
5) There is an incomplete retraction of the latch bolt.
Possible causes:
The mortise is malfunctioning.
The stop plate is malfunctioning.
Solutions:
Turn the inside and outside levers to test the retraction. The latch must not
protrude from the mortise front plate. If the latch does not fully retract it may
start to bind on the strike. Replace the mortise.
If the retraction is still not full, replace the lock.
Kaba Ilco Lodging Access Control System