3609 TC reported TIMS show A/C 2 fault code 630, lost power. ~~~~~ 3609 TC reported TIMS show A/C 2 fault code 630, lost power. TC unable to reset air-con fault. Staff(KTB) checked and feedback no aircon fault found. Car was cooling.  3609 A/c 2 TIMS showed 'O '. Found ACCB showed A/c 2 in 'O '. Measured LVD 3 & 4 PCB output for both A/c 1 & 2 - OK. Swopped MCU with A/c 1 but fault still remained at A/c 2. Re-checked TIMS unit PCB security - OK. Checked A/c with PTE A/c program - OK. A/c 2-1 & 2-2 running. OPS 20 raised to follow-up.  Au TK 43970 Follow up 3609 ACCB shows O .  3609 swopped LVD 3 & 4 to 1609 but fault still at 3609. Removed 3609 TIMS CN3 connector & checked supply - OK. Re-connect CN3 connector & fault cleared. Function checked A/c - OK.  Goh AT/Chan GF 43970