The original fleet of nine 6-car trainsets was built from 2004, and consist of two limited express configuration cars based on the
2000 series EMUs together with four commuter configuration cars with three pairs of doors per side. The trains entered service from 29 January 2005. Another six-car set, numbered 2212, was delivered in 2016. Set 2213 was delivered in February 2019.
2230 subseries Following the withdrawal of the
1700 series, four additional six-car sets were formed from 2019. Numbered 2231 to 2234, these sets are formed of two newly built limited express cars and four 2300 series commuter-style cars that were originally part of 1700 series trainsets. The first 2230 subseries set to be formed, 2234, entered service in February 2020, using the 2300 series cars from 1700 series set 1704. ==References==