During what condition should fire alarm systems be tested aside from annual checks?

When significant maintenance work is performed on a fire alarm system, testing is critical to ensure that the system operates correctly and meets safety standards. Maintenance work can include repairs, replacements, or upgrades, any of which may impact the system's functionality. Testing the system after such work ensures that all components are working together as intended and that the system is fully operational.

While other scenarios, like adding new devices, could also necessitate testing to confirm integration, the necessity to test after substantial maintenance goes beyond regular operational checks. It is essential to verify that the maintenance actions did not inadvertently create issues, thereby ensuring reliability in emergency situations. Regular checks, targeted tests following maintenance, and vigilant monitoring all contribute to comprehensive fire safety management.