#2564 Fire internal & external fault to ~~~~~ #2564 Fire internal & external fault to Check Tims FC-731/735 Further check external smoke detector found rusty on pcb and very dusty at smoke sensor.Change out as preventive measure and function test ok.Check fire panel relay no sign moisture or arching ,swap #2564 fire panel relay to #1563 further monitoring. #2564-smoke detector:- Not: 2483372 raise. Done by Sanip/Koh. 27/04/23