There is a slim possibility of this happening – but very slim indeed. About 1 in 16 million sprinkler heads are triggered outside of a fire event. The main cause is either sabotage or improper design criteria that fails to consider a high-heat location. You need to hire a company like Allstate Sprinkler Corporation with the experienced fire protection design engineers as well as the qualified field personnel to account for areas with unusual levels of sunlight or other heating factors.