i love the surgery room!

@DeepKissWithSis: Are you perhaps using an outdated version? The earlier versions had a broken setup iirc due to the reactors originally missing the required input pins which were not part of Enhanced Reactors and I didn't notice at first. Had to update ER and then updated the submarine file afterwards to fix it, but if you created your campaign with an earlier version then the reactor setup is outdated.
So update the file and check in sub-editor if it's working properly.

Copying from the format I gave and its response, it would be

"ra-auto"
"SETTING ALL REACTORS TO AUTO CONTROL"
"r1-on"
"r2-on"
"r3-on"
"r4-on"

Nothing happens afterwards, submarine would still be in a blackout

It still doesn't work though... did as you said, but the system only responded to my ra-auto commands with a "SETTING ALL REACTORS TO AUTO CONTROL" and nothing else after I inputted r1-on, r2-on, so on and so forth

@DeepKissWithSis: You'll also have to activate automatic control for them to turn on. It'll always be disabled at first or when shutting a reactor down with the shutdown command.
So procedure would be:
ra-auto
r1-on
r2-on
r3-on
r4-on

ra-on doesn't exist as each reactor checks for fuel and responds back if there is no fuel left, but this only works when targeting each reactor individually when turning them on. That's why you can't turn them all on at once.

How does one turn on the reactor? Me and my friends cant find the way to turn it on in the control room screen, typed in "ra-on" or "r1-on" but nothing works. Only the "ra-off" or "r1-off" function works