This is the Service Elevator near the 2 main ones with a different chime and "kinda broken" alarm. For some reason, it didn't use the Square buttons like in the main elevators. G is called LL in the outside indicator, and strangely, 3 is called GF, even if that's not the ground floor. Btw, that lone derelict 3-speed door OTIS GeN2 has been derelict since 2014, 1 year after installed (All the elevators here were from 2011 except for the second passenger elevator (2013) and that 3-door guy (Also 2013)). They turned that elevator off for a good reason. Strangely, the outer indicator still works, even if the elevator shaft is now stained and abandoned. The tiny Han Dok elevator was installed in 2012 along with the carpark elevators (Asian OTIS GeN2 with Square buttons).
Credits to all respective owners.