Even as Siemens (the company that supplies the new hi-tech rakes) has accepted that the traction motors in its swanky trains are faulty and agreed to replace them by the first week of April, the railway authorities have started damage control.
The main reasons for failure have been identified as malfunctioning of traction motors, faulty software, pneumatic trouble and auxiliary warning system inconsistency. Traction motor and software failure contribute to 90% of the breakdowns.
The entire article can be found here. This is indeed good news, but I doubt whether they will be able to finish the replacement by 1st week of April.