TC reported Smoke external alarm at front M2 car. Staff(BBT) checked and feedback no smoke or heat e xternally or internally. ~~~~~ #2563 smoke External Alarm Reset Fault Cleared. 45033     #2563 FC 721 Smoke detector.Further check smoke detector no sign water imgress into pcb,c/o as preventive measure and function test ok. Not: 2480792 raise. Done by Sanip/Koh/Rizman.  18/04/23