My remote control ON /OFF buttons of my Air conditioner are not working properly, model = #SRK12CEPU and model of my remote = RKN502A ....If I take out the front panel, is there manual switch's inside the unit to at least turn it on / off so I can set the timers and temperature . ...Right now without the remote working this unit is useless? I would imagine yes ? or do I need to buy a new remote . I know it runs on 240 AC volts