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Low Battery Warnings

Replace the batteries in the appropriate device when
the low battery warning sounds. Use only recom-
mended battery types (see Description section of this
manual). Change the battery in non-hazardous area
only. Failure to follow this warning can result in seri-
ous personal injury or death.

Note:

There are unique Low Battery Warnings for the

NightFighter Receiver and ICM Tx Unit or Nightfighter
transmitter which are each displayed by the NightFighter
Receiver.

1. If there is a low battery in the receiver, one short

Yellow LED will flash.

2. If there is a low battery in the ICM Tx Unit or

Nightfighter transmitter, double short Yellow LED
flashes will be displayed.

3. If there are low batteries in the receiver and ICM Tx

Unit or transmitter, the Yellow LED will alternate single
and double flashes.

Replacing the Batteries in the ICM Tx Unit

Do not dispose of the battery in fire. It may explode.
Failure to follow this warning can result in serious per-
sonal injury or death.

1. Loosen the four screws from the battery compartment

of the ICM Tx Unit then remove the battery cover (two
screws if Nightfighter Transmitter is in use).

2. Insert the four AA batteries following diagrams inside

battery compartment (two AAA batteries if Nightfighter
Transmitter is in use). Insert each battery base firmly
into the case, then press down and in on the top of
the battery.

3. Verify that the battery cover gasket is held in place

and is free from damage and debris and is not twisted
in the gasket retention groove in the battery cover.

4. Before replacing the battery cover, be sure that the

rubber cover on the ICM Tx Unit is properly engaged
with the plastic housing. The rubber cover has barbs
that hold it firmly against the plastic housing.

5. Replace the cover. Make certain that the battery

cover is oriented properly. Align the angled tabs near
the battery cover screws with the battery cover.
Check that the rubber cover is no bunched or pinched
under the battery cover, otherwise the battery cover
may not remain water tight.

6. Evenly tighten cover screws by moving in an X pattern

(for ICM Tx Unit) around the cover. Be sure to tighten
the battery cover screws enough to provide adequate
compression on the battery cover gasket to prevent
dirt and moisture from entering the battery compart-

ment. A torque of 6 in lbs is suggested. Do not over-
tighten the screws. Do NOT use a thread sealant on
the screws.

7. Dispose of, or recycle batteries in accordance with all

applicable federal, state, and local regulations.

Replacing the Batteries in the NightFighter Receiver

Do not dispose of the battery in fire. It may explode.
Failure to follow this warning can result in serious per-
sonal injury or death.

1. Loosen the screws to open battery door.
2. Insert two AA batteries (Duracell MN1500 or Energizer

E91) according to the battery orientation noted inside
the compartment. (Older versions of the NightFighter
Receiver use AAA batteries). The approved AAA bat-
tery is Duracell MN2400, Energizer E92, or Eveready
A92.

3. Verify that the battery cover gasket is held in place

and is free from damage and is not twisted in the gas-
ket retention groove in the battery cover.

4. Align the battery cover to the RX housing and tighten

the screws evenly from side to side. Be sure to tight-
en the battery cover screws enough to provide ade-
quate compression on the battery cover gasket to pre-
vent dirt and moisture from entering the battery com-
partment. Do not overtighten the screws. Do NOT use
a thread sealant on the screws.

5. Dispose of, or recycle batteries in accordance with all

applicable federal, state, and local regulations.

Turning the ICM Tx Unit Off After Doffing the SCBA

Turn off the ICM Tx Unit after doffing the SCBA; other-
wise batteries will be drained. The ICM Tx Unit does
not shut off automatically.

1. Upon returning to fresh air, close the cylinder valve

completely and release all pressure from the system
following the SCBA instruction manual.

2. When the pressure falls below 200 psig, turn the

device off by pressing the reset button 2 times in rapid
succession.

3. The ICM Tx Unit will beep 1 time when the button is

pressed once. Pressing the button a second time will
then sound three beeps (“bee-bop-bop”) to indicate
that the unit is turned off. The lights will also stop
flashing.

WARNING

DURING USE

TAL 507 (L) Rev. 1 - 10058881

WARNING