11.3.1. Definition of malfunctions of sound signals
The reasons of malfunctions of sound signals can be the following: does not operate or заедает the switch, the sound signal or the relay of inclusion of signals is spoilt.
For failure detection check up reliability of connection of wires, a condition of contacts of the switch and the relay. If necessary smooth out contacts. Faulty a sound signal, the switch or the relay replace new.
If force of sounding of a signal decreases or will appear rattle, whether check up pressure of the storage battery is lowered. If it in norm adjust a signal screw turn on its case in this or that party before reception of a loud and pure sound.
If adjustment does not eliminate rattle or the signal works falteringly disassemble a signal and smooth out contacts of its breaker.
At signal assemblage it is necessary to establish a former lining between a membrane and the signal case not to break a backlash between the core and an anchor.