Probably impossible due the the different motoring systems
used.
It was 215/226. 216/225 was not spotted at all ytd.
It may be possible,
If: The couplers are compatible. They are, actually, from what I
observed, through all the series.
If: The GTO-VVVF have a code to downgrade to match the 4Q
Chopper. Of course SMRT would not have customized that but the
SIBAS 32 (system controller of the Siemens) has such features.
If: The electronics and braking system can communicate with each
other. The SIBAS 32 handles this as well.
Have you guys thought that this may not be a miscoupling but
just an operational way of coupling two EMU together when one set
is taken for repair?