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 Heads-Up Display System Receiver and ICM
Tx Unit or Nightfighter Heads-Up Display System
Transmitter which are each displayed by the NightFighter
Heads-Up Display System 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 Heads-Up Display System 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 Heads-Up Display System
Transmitter is in use).
2. Insert the four AA batteries following diagrams inside
battery compartment (two AAA batteries if Nightfighter
Heads-Up Display System 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 Heads-Up
Display System 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
Heads-Up Display System Receiver use AAA batter-
ies). The approved AAA battery 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 SCBA; otherwise,
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 (yellow) 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.
DURING USE
14
TAL 709 (L) Rev. 4 - 10058881
