#3533 AC 1,RATTLING NOISE,AC 2 HLPS FAU ~~~~~ #3533 AC 1,RATTLING NOISE,AC 2 HLPS FAU     #3533 Checked a/c 1-1 and 1-2 when a/c cut in,no rattling or abnormal noise observed.Further check found AHU 1-1 choke,cooling fans icing and ponding.Replaced AHU 1 and top up freon for 1-2,ok.A/C 1-1 CCU unable to top up freon due to choke.Raise not:2132417 to RSW for #3533 /1 CCU c/o. #3533 a/c 2-1 & 2-2,RSW assisted to purge and vacuumm CCU.Top up freon (LP:25,HP:100)Cut in/out ok. AHU (#3533/1)-Old s/n: 0322555  New s/n: 535165    Not: 2132415 raise to RSW. Done by Jack/Sateesh/Koh. 18/02/20