User's Manual
USING THE AIR MASK
18
TAL 708 (L) Rev. 1 - 10082858
red when the air mask has reached 25% of the rated
s
ervice pressure. This buddy light is not visible to the
user while the air mask is in use.
3
. When the user of the air mask remains motionless for
approximately 20 seconds, the PASS pre-alarm will
begin to sound. During this pre-alarm, the FireHawk
M7 HUD will display an orange LED, and this LED will
extinguish when full PASS alarm has been reached or
t
he pre-alarm has been reset.
4. When an evacuation command has been sent to the
user (if the optional FireHawk M7 Telemetry Module is
in use), the FireHawk M7 HUD will display an alternat-
ing red and orange LED until the evacuation has been
confirmed.
5. The FireHawk M7 HUD has a photo sensor that auto-
matically adjusts the brightness of the LEDs based on
the intensity of the ambient light measured outside of
the facepiece.
6. The FireHawk M7 HUD indicates a low battery condi-
tion by a single flashing yellow LED. When the
FireHawk M7 Power Module reaches a low battery
condition, a double flash of the yellow LED will be dis-
played in the FireHawk M7 HUD. If both the FireHawk
M7 HUD and FireHawk M7 Power Module have
reached a low battery condition, the FireHawk M7
HUD will display an alternating single and double flash
of the yellow LED. If this condition exists, return to
fresh air, and replace the batteries immediately. See
Replacing Batteries in the FireHawk M7 HUD.
Refer to Chart 1 for a full description of all FireHawk M7
H
UD LED patterns.
R
eplacing the Batteries in the FireHawk M7 HUD
Replace the batteries in the FireHawk M7 HUD when
t
he low battery LED flashes. Use only recommended
battery types. Change the batteries in a non-haz-
ardous area only. Failure to follow this warning can
result in serious personal injury or death.
1. Unthread the battery cap (counter-clockwise) on the
FireHawk M7 HUD battery tube.
2. Remove the battery cartridge from the FireHawk M7
HUD.
3. Remove the batteries and discard.
3. Inspect the battery cartridge for signs of damage such
as corrosion on the battery terminals or cracks in the
cartridge. If the battery cartridge is damaged, replace
the cartridge immediately.
4. Insert three AAA alkaline batteries in the appropriate
locations on the cartridge. Follow the notations on the
cartridge to ensure proper battery orientation.
R
G
G
G
Y
G
G
G
G
Y
76% to 100%
Full Cylinder, 4 Green LED
20 Sec. Steadily ON
75% to 51%
3/4 Full Cylinder, 3 Green LED
20 Sec. Steadily ON
26% TO 50%
1/2 Full Cylinder, 2 Yellow LED
30 Sec. Flashing ON/OFF
25% to 0%
1/4 Full Cylinder, 1 Red LED
Flashing Continuously
Yellow LED, Low Battery LED
Single Flash - M7
Double Flash - M7 Power Module
Alternating Single/Double Flash -
Both M7 HUD and M7 Power Module
YR
O
Orange LED
for PASS Pre-Alarm
Red/Orange LED for Evacution Signal
Alternating Red/Orange
(M7 Telemetry Model)
Chart 1: FireHawk M7 HUD LED Patterns