REPAIR OF BLACKOUT WARNING SYSTEM
The blackout warning system is intended to warn personnel in the shelter to turn off the lights in the shelter before the
shelter door is opened during a blackout. The system consists of a blackout warning buzzer, located directly above the
electrical control box against the inside of the right-hand rear wall, and a blackout buzzer warning pushoutton located on
the rear outside wall to the left of the shelter door.
13-2. Blackout Warning Buzzer
a. Blackout Warning Buzzer.
(1) Inspection. If the blackout warning buzzer is not activated when the switch is depressed, inspect/test the buzzer
(a) Position blackout buzzer circuit breaker in main power service box to on.
(b) Remove the screws that attach the buzzer cover to the base and remove the cover. (See fig. 13-1).
Figure 13-1. Blackout Warning Buzzer, Removal and Installation.