keyed entry remains open

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A 4040SE would not hold the door open if it has : No Voltage or Improper Voltage. Check that the track has proper voltage going to it (24V AC/DC or 120V AC). If 120 volts is supplied...
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...
In a push button type switch (RX or LX), in which the contacts remain in one state unless actuated, the contacts can either be normally open (abbreviated "n.o." or "no") until closed by o...
An inconsistent opening is normally caused by the arm not being installed correctly. The arm must be installed while the operator gearbox is in the full open position, and the door at 90° open posi...
When installing the arm; the gearbox shaft  and door must be at the (+90°) full open position. The following step are used to install the Sr. Swing (REG) push arm. Install the header and door brac...