TIMS showed Obstacle Detector fault alarm atcar 2607 'A1' door when train doors were opened. Staff (MSL) checked and confirmed no abnormalities. ~~~~~ 2607 TIMS showed Obstacle Detector fault alarm @A1 door when train doors were opened. Staff (MSL) checked and confirmed no abnormalities.  2607 A1 door found no FC registered. Checked/found LHS & RHS outer rollers delaminated, inner rollers checked - OK. Replaced both LHS & RHS outer rollers. Cleaned J-rail/guide rail. Checked weather strip condition, door gap 63.8mm & no FOD found. Door cyclic test & door open/close timing check - OK. No DIR illuminated when all doors were proven closed.  Sarma/Sugu/Kamarul/Lee PT 45092