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TROUBLESHOOTING PROCEDURES - continued - TM-55-1925-292-14-P0150
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TM-55-1925-292-14-P Firefighting Fire Alarm and Fire Suppression Systems Inland and Coastal Large TUG (LT) Manual
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Figure 1. Fire Detection Panel Simplified Schematic
TM 55-1925-292-14&P
0009 00
Fire Detection System Does Not
Alarm When Activated Manually
Does
Fire detection
the fire
Reset all activated
panel battery or
detection panel
fire alarm pull station(s)
Do any fire alarm
battery charging
No
No
return to normal
with the hex key, and
pull stations activate
circuitry is faulty.
operation with
reset the fire
the fire detection
Notify the
the TROUBLE
detection panel
system?
maintenance
LED not
supervisor of the
illuminated?
defect.
Yes
Yes
The fire alarm pull
WARNING
Yes  staNonifiy tfhe lty.
ti
s au
Does
Take great care when working
ot
Do other fire alarm  Yes  around energized electrical
the fire detection
maintenance
pull stations in the
system activate?
equipment. Contact between
supervisor
same zone activate the
unprotected body parts and
of the defect.
fire detection
electrical conductors can
system?
cause serious injury or death.
Alarm bell is faulty.
No
Notify the
No
maintenance
Position a jump wire between
supervisor of
the terminals of the suspected
the defect.
faulty fire alarm pull station.
Yes
Is
24 Vdc present
WARNING
Is
at the applicable
Take great care when working
24 Vdc
Yes  around energized electrical
dual zone module
present at
terminals 8 and 11
equipment. Contact between
the alarm
(Zones 1 and 3) and
unprotected body parts and
bells?
2 and 5 (Zones 2
electrical conductors can
and 4) (figure 1)?
causeserious injury or death.
No
No
Measure for 24 Vdc
at the terminals of
the alarm bell(s).
24 Vdc electrical wiring is faulty.
Notify the maintenance supervisor
of the defect.
The dual zone module in the
affected zone is faulty. Notify
the maintenance supervisor
of the defect.
Exit
Procedure 9. Fire Dectection System Does Not Alarm When Activated Manually
0009 00-15

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