Warranty on the HHD is one (1) year from date of purchase.
The battery for the HHD (Bluebird Pidion) is covered under warranty. However, as the batteries are not available sep...
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...
Followings are the reason for 98/99 exit alarm ALK not sound when push bar is activated.
Make sure key switch on exit alarm ALK is turned on, wait for 20 seconds before you activating the pushba...
Attached table provides how long the battery back up will last with a PS914 power supply.
Load (Amp
DC)
Battery
backup time
Comments
0.3 Amp
20 hours
Continuous load
...