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“
latch not stay closed
”
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Question
Answer
Why does the ND40 stay locked after egress?
Resolution:
There is potential for ND40/ND44's manufactured around March 2011 to remain locked after egress, or after the latch is depressed. There was an issue with the keycam that created a bind when l...:
What causes am ME Series closer to creep shut (creeper)?
Resolution:
If an ME Series closer creeps shut or will not hold open, Verify proper voltage is being supplied to the closer, if correct Check the on/off switch. Verify the voltage on the 2 pin co...:
What would keep the vertical rod exit devices top latch from being held retracted in the open position?
Resolution:
Following exit devices 2227/F, 33/3527A/F, 33/3547A/48A/F, 98/9927/F and 98/9947/48/F have similar rod adjustment procedures. All top latches control the bottom latch assemblies. When do...:
Why is the 2390 top latch not staying retracted when dogged?
Resolution:
Most likely need to length the top rod so latch can engage it's internal latch retention state. See 2390 Instructions for adjusting rod lengths.:
What drains the AA batteries on an AD-Series lock?
Resolution:
Causes for AA battery drain in AD-Series LOCKS Possible Cause Fix/Corrective Action 1) One the four (or eight) AA was inserted reversed and the rese...:
What drains the AA batteries on an CO-Series lock?
Resolution:
Causes for AA battery drain in CO-Series LOCKS - Possible Cause Fix/Corrective Actions One of the four AA batteries was inserted reversed and the reserved battery drains the other batteries. ...:
How do I change the function of the Von Duprin 7500 mortise lock from Lever ( classroom ) to NL ( night latch )?
Resolution:
To convert the Von Duprin 9975L to 9975NL exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory): Turn the NL screw on 7500 mortise lock counter clo...:
Why would bottom latch on 98/9927 drop when top latch stays retracted?
Resolution:
Check the adjustment and if this does not resolve then you may possibly have a defective center case or bottom latch.: