mitsubishi central controller G-50 A

[sork]

hi guys
i am working on a multi city mitsubishi, unit 6 is not working, the controller does not show any error , temp is 27 c set at 19c but unit not cooling.
i set the group on cooling - press enter then at the bottom( function area) it shows
mon ph col m mr

i press mon to blink then enter
address apears saying press the switch you want to operate.
secondly the setting at the bottom is blinking , is that normal?:off topic:

[DL A/C]

mitsubishi electric controller, PAR-JH240KA...ABOUT TEN YEARS OLD ,ITS LOCKED DOES ANY ONE HAVE ANY INFO ON HOW TO BREAK INTO IT SO I CAN CHANGE THE TIMER.THANKS

[regcooldude]

flip the front off and adjust dip switch to unlock it