The causes and solutions of common faults in automatic fire alarm systems:

(1) Common fault phenomena: The fire alarm controller emits a fault alarm, the fault indicator light is on, and the printer prints the type, time, and location of the detector fault.

(2) There are the following reasons for the malfunction: the detector is detached from the base and has poor contact; Poor contact between the alarm bus and the base; Short circuit caused by open circuit or poor grounding performance of the alarm bus; The detector itself is damaged; Reasons such as detector interface board malfunction.

(3) Exclusion method: Tighten the detector again or increase the contact area between the base and the detector clamp spring; Reconnect the bus to ensure good contact with the base; Identify the faulty bus location and replace it; Replace the detector; Repair or replace the interface board.