TC reported TIMS showed Smoke External Alarm in front DT car. Staff(TAM) checked and confirmed no si gns of heat and smoke. ~~~~~ TC reported TIMS showed Smoke External A   Found water ingress insde smoke detector .Clear water ingress and moisture .Found evaporator hatch cover rubber  insulation missing .Installed new gasket .Function  checked no occurrence of alarm.To be monitor again in ML N.AYANTO //01.08.21    ------------------------