Snap reported car 1570 a/con fault. ~~~~~ Confirmed 1570 A/C #2-2 with low freon. Charged up to criteria and conduct leakage test on both CCU underframe and pipings. None found.    Rasie Ops20 to verify any leakage on the rooftop of 1570. Verified 1570 A/C #1-1 with motor shorted, unit isolated and tagged. Raised N2388131 for CCU changeout.  /KWOK.K.T/04.05.22  CHECKED #1570 AC 2 AHU NO LEAK.FOUND AC 2 CCU MULTIPLE LOCATION FREON LEK.REQUEST CCU C/O.NOTIFICATION 2388421.JIMMY/IBRAHIM/RAGHU 06.06.2022