DT check found 2507 smoke external lit u ~~~~~ 2507 smoke external     #2507-#2 end replace smoke detecto unit and function test ok.Replcement done due to water ingress into PCB Done by Saini/Haikel/Asruddin/Koh.  13/01/21 To follow up rectify.  507/508 transferred to BSD to follow-up on #2507 smoke external fault.  Kana 44208 2507 DT check found smoke external lit up.  2507 smoke external unable to reset. Unit isolated & tagged. OPS 20 raised to BSD to follow up.  Kana 44208