EMU 521/522 # 2522 A/C 2-1, 2521 A/C 2-1 ~~~~~ 2522 A/C 2-1, 2521 A/C 2-1 Compressor & Coolant pressure fault.  2522 A/c 2-1 & 2521 A/c 2-1 found slight low pressure. Charged to LP (40 psi) HP (120 psi) - Done. CCU checked no leakage found. Monitor for 1 hr - OK. Temperature check - OK.  Selvan/Lee PT 44000