We are currently encountering multiple “Invalid Reply Module” faults on our AM6000 and AM8200 Notifier Italy fire alarm panels. These issues are particularly affecting sounder modules, along with some loop communication faults.
Interestingly, the affected sounders were tested individually and are functioning correctly. However, the faults continue to appear on the system.
We would appreciate your support and any guidance you can provide to help resolve this issue.
The control panel is not communicating with the modules with the “Invalid reply” error. It could be wiring if there are several, a bad module, a water damaged module or one that has the wrong address.
You are right sir, but i have tested the sounders and work properly ,this is the problem. Wiring is correct and sounders react. "Invalid Reply " issue still appear
Hello. usually this might happen due to interference on the line, bad sounders or wrong brand of sounders. If you have spares, maybe change them and see if the issue disappears. if not it might be issue of the panel