Door closing difficulty
Dry Latch
Apply light lubrication (GLS200)
to the latch, aperture and keep
contacting surface
Stiff key operation
Door not latched correctly
(This can be proven by temporarily
holding the hooks back with a
suitable tape)
Relieve pressure on the hooks by
gently pulling on the door externally
or pushing internally to operate
Incorrectly adjusted keeps (The latch
is the compression point, the hook
sides should not contact the keeps)
Adjust centre keep accordingly.
Unable to operate the locking
system (Blocked)
Hooks fouling inside the keeps..
Door dropped or incorrectly
positioned keeps
Attempt to lift the door leaf whilst
operating the lock
Excessive air gap to the lock side
Adjust the door leaf closer to the
lock side
Door not latching
(In secure mode)
Lock drive strip fouling on routing
etc
Locate and relieve cause.
Misaligned centre keep
Check centre lines
Magnet stuck in
Check operation
TAFA day switch engaged
Disengage
Door not releasing
(In passive mode - Day switch
engaged)
Latch keep movement impeded
Check and relieve
Air gap too tight
(Triggering operating snib)
Adjust air gap
Product Code: ML3120S
WINKHAUS AV3 – ML3120S & ML480 TROUBLESHOOTING GUIDE
LIT-DC-ML3120S
Page 14 of 14
T
01726 871 025
E
sales@coastal-group.com
W
coastal-group.com
© Coastal Specialist Ironmongery Ltd
SYMPTOMS
POSSIBLE CAUSES
SUGGESTED REMEDY
Whilst every effort is made to ensure trouble-free operation of the door locking system the table below may help
to remedy any issues experienced.
To help diagnosis we firstly suggest checking full operation with the door open.
