The station manager was suspended with immediate effect after he made an error that allowed the train to move off from Ang Mo Kio station with its door open.
The North-South Line was hit by a platform screen door fault that lasted more than two hours on Thursday during the evening peak hour.
The malfunctioning doors on the Downtown Line's Botanic Gardens station have been fixed, but cause of the glitch remains unknown.
Downtown Line MRT services were delayed from the start of service up to lunchtime yesterday due to a platform door fault at Botanic Gardens.
