Train DIR did not extinguish when train doors were closed. TC opened and closed once to clear fault. ~~~~~ 3556 Train DIR did not extinguish when train doors were closed. TC opened and closed once to clear fault.  3556 door guides checked for FOD - OK. Open/close saloon doors 3 times from both DT cabs - OK. DIR not lit up when saloon doors were in closed condition. Door cyclic test & door gauge test (20mm) - OK. OPS 20 raised to follow-up.  Sarma 43985 To follow up.  555/556 ER D/L - Done. ER showed DIR relay energised during fault reported. Door gauge test - OK. Door operation test 20 times - OK. As preventive measure, replaced 3555 DLR relay. Function test - OK.  Goh AT/Chan GF 43985