why would chexit buzz when door armed

RELATED FAQS

Question
Answer
Using the key from the pull side of the door does not retract the latch bolt on a rim or vertical rod chexit device.
CX98/9975 mortise devices will retract the latch bolt when the key is used on the pull side of the door.
Chexit devices shipped with motor after 8-24-2015. 1. When Chexit device is set for more than zero second rearm time (factory setting is 10 second rearm time) and device goes into alarm immediatel...
Chexit devices shipped with solenoid prior to 8-24-2015. 1.  When Chexit device  is set for more than zero second rearm time (factory setting is 10 second rearm time) and device goes...
The NL key override will not open the door while Chexit rim or vertical rod device is in the arm mode.
Most common issue listed below: Chexit devices shipped after 8-24-2015 with motor driven. The Green wire is not shoeted to the Red wire if no Access Control system is used.If Access Control is us...
 Chexit devices shipped prior to 8-24-2015 with solenoid driven. The GREEN wire is not shorted to the WHITE if no Access Control system is used.If Access Control system is used,...
When CX99L-BE is not armed with key cylinder on the device or shunted by card reader, the exterior 996LBE lever trim will release.
Some transformers in the power supplies provide a little humming noise and that is normal. If the humming in Von Duprin PS873 power supply is loud follow these steps. Remove the load from the outp...
Chexit devices are NOT electric latch retraction.  In order for Chexit device to operate with an auto operator you will need to add a rim electric strike on a single door or a pair o...
Devices were shipped from the factory with motor driven after 8-24-2015. First confirm that you are using PS900 series (902,904,906 or 914) power supply.      1. Mea...
Devices were shipped from the factory with solenoid driven prior to 8-24-2015.  First confirm that you are using a PS873 or PS914 power supply.Measure the DC voltage at the ten wire hardness a...