Chapter 5: Diagnostics, maintenance, and testing 
 
P/N 3102351-EN • REV 005 • ISS 28DEC18  183 
Replacing a device in alarm 
You can replace a device with a new device of the same type while it is in alarm. You may 
need to do this when the device is faulty or for troubleshooting purposes. If you replace a 
device while it is in alarm, the device and control panel operate as follows: 
•  When the device in alarm is removed, the control panel remains in alarm and a trouble 
event displays. 
•  When installed, the new device does not go into alarm, but the LCD displays a second 
trouble event when the panel detects the new. 
•  When the control panel resolves the new device, the alarm condition restores and the two 
trouble events clear from the control panel. 
Note: If the device causing the alarm is reinstalled, the device goes into alarm and the alarm 
condition does not restore.