Trouble condition is indicated by the illumination of the common trouble lamp and the energizing of the trouble
buzzer. The trouble buzzer may be silenced by operating the trouble silence switch. Operation of the trouble
silence switch illuminates the trouble silence lamp. If the trouble condition is cleared while the trouble silence
switch is in the off-normal position, the trouble buzzer will resound until the trouble silence switch is restored to its
normal position.
7.10
Blower Selection Switch
To provide the continuous operation availability of the smoke detector for the duration of the voyage, the suction
blower assembly is equipped with two identical blower motor assemblies, either one of which operates the
system.
The selection of Blower No. 1 or Blower No. 2 is made by means of the blower selecting switch on the smoke
detector electronics drawer on the front panel.
In the event the blower failure trouble lamp is illuminated, the blower selecting switch should be set to the other
blower.
Some ships customarily operate both blowers on an alternating basis with Blower No. 1 operated on odd days
and Blower No. 2 operated on even days.
7.11
Power Failure Alarm
The power failure alarm is energized in the event of:
a.
Loss of AC power on Line 1 or the opening of Fuse 1 or
b.
The simultaneous failure of both Power Supply Nos. 1 and 2.
Power failure alarm consists of the illumination of the power failure alarm lamp on the front panel plus the
energizing of the trouble buzzer.
The trouble buzzer is silenced by operating the power failure alarm silence switch. Operating the switch
illuminates the power failure alarm silence lamp.
If power is restored while the power failure alarm silence switch is in the off-normal position. the trouble buzzer
will resound until the switch is returned to its normal position.
7-8
