3532 (W) TC reported air-con fault. Unab ~~~~~ To carryout 2531 A/C 1-1 & 1-2 evaporator system for freon leakage check.   Checked both 2531 AC#1-1 and #1-2 both low on freon (LP:20/HP120). Found seepage signs at the valve connector, retighten connector and clean off old stains. Charged up freon to criteria (LP:40/HP:120) for both aircon units. Conduct soap test at underframe CCU and pipings but found no leak. Function test aircon operational and able to achieve cooling temperature of 22?C. Raised OP20 for TWD to check Evaporator unit of 2531 AC#1 for any freon leak. Checked 2531 AC#2-1 & #2-2 are operational." N.A/sankar/razali/12.04.23