Press * twice. If that doesn't work, it sounds like your fire alarm never reset. Are you sure the fire alarm is fed power from the "switched power" terminals and not the "aux power" terminals? See the installers guide. Otherwise its a bad sensor. Why did it go off?
My guess it was wired to aux power and not switched power. Is it on zone 1 to 4? When a fire alarm goes off it gets latched, so power has to be reset to the sensor to clear it, and if its not hooked to switched power, this is probably not occuring. This worries me greatly, because it means your fire sensors are not hooked up correctly. I would have all the fire control wiring and relays checked by someone who is qualified if you can't do that yourself as soon as you can. Chances are there are other problems as well. Fire circuits are the most complex type of sensor and they have to be wired in a specific way. Currently your fire sensor is being bypassed by the alarm, so its basically is doing nothing for your system.
