Many of the banmks as already stated refuse to turn these on at their cost. The PAR agreement of sale does say already that all systems need to be turned on for inspections, however, the banks often attach an addendum that over rides this.
Ask your agent to call and see if they can get the turned on, sometimes they insist you pay for it and must use their contractors. It is one of those situations where the banks seem to have the power, but it is always worth trying to negotiate.
Just decide if you cannot get it on, are you willing to walk.