From my notes......
on the thermostat push the power button and the down arrow (that adjusts the temp) at the exact same time. If you do this correctly there will be the letters "bp" where the temp numbers usually are. You are now bypassing the sensors in the room. You can set the temp to whatever you want and it keeps the room that cold whether you are in it or not. The maintenance man said that you might have to do this once a day as the thermostat tends to go back to sensor mode after 24 hours.
hope this is what you were looking for