I have a split unit ac Hitachi ras-24cp6. there is a switch hidden on the indoor unit called "service swtich" that switches between Normal or Cool.

what is the use of this switch?

I lost my remote control, tried to start the ac from the indoor unit. but did not work unit i reached that button and swithced to Cool. but i'm afraid it's making the compressor always on.
any body have an idea about this switch please?