How are ionization and photoelectric smoke detectors restored to non-alarm condition after smoke is detected?

• A. By Resetting the Control Panel After a Water Flush
• B. They Will Reset at the Control Unit When the Smoke Clears
• C. Manual Reset Is Required at Each Detector
• D. They Reset Automatically After a Fixed Period

Answer: (B)

When smoke is detected, ionization and photoelectric detectors send an alarm signal to the fire alarm control unit. The panel coordinates the system’s response, including sounding alarms and showing the affected zone. After the smoke clears, the control unit resets the alarm condition and returns the detectors to normal standby. This central reset means you don’t have to manually reset each detector at every device; the panel handles the transition back to non-alarm once the circulating smoke and condition are resolved.