Remote control can turn air condition - on & off. No other function can be used?? It is currently set as "fan" mode for some reason and will not switch to any other mode nor any other buttons can be used? I have 4 Mitsubishi air condition in the house and the other 3 can function with interchanging their remote control. It is only this specific model which has its stand alone remote and is NOT functioning ! only says Mr Slim - I am not sure exactly which model is it - Please help asap thanks