TIMS showed Smoke External Alarm at Front DT car. Staff(AMK) checked and confirmed no signs of smoke/ fire / burning smell on exterior or interior of train. Re ar T226 line clear and confirmed no abnormalities. ~~~~~ T429 3660 (N) TIMS showed Smoke External Alarm at Front DT car. Staff (AMK) checked and confirmed no signs of smoke / fire / burning smell on exterior or interior of train. Rear T226 line clear and confirmed no abnormalities. KTB NB. CE:3660 Smoke External Alarm Reset.Fault Cleared  FC-721-smoke external fault alarm. Further check no observed any, but fault intermittent, c/o as preventive measure. Function Testing ok. Done by: Jack, Koh, Sanip. 24/07/2024.