Speaker Module Operation - MSA G1 SCBA Operating Manual

(17) To test manual activation of the PASS alarm, push and hold the ALARM button on the front of
the control module until the alarm activates.
(18) Listen for the tones of the PASS full alarm.
(19) Make sure the buddy lights flash red.
(20) Make sure the red LED shows in the HUD.
(21) To reset the PASS alarm, push the right green RESET button on the side of the control module
twice within approximately 1 second.
(22) Turn the handwheel clockwise to close the cylinder valve fully.
(23) Slowly turn the regulator bypass knob counterclockwise to open the regulator bypass valve until
the pressure reading for the control module decreases below the following value:
• 775 psi for 2216 psi system
• 1575 psi for 4500 psi system
• 1925 psi for 5500 psi systems
(24) Make sure a red LED flashes in the HUD at the appropriate pressure.
(25) Make sure the primary low-pressure warning device is in alarm, all of the buddy lights flash red,
and the pneumatic light comes on.
(26) Make sure the alarms continue until the air pressure is 200 psi or less.
(27) When the air pressure decreases below 200 psi, push the green RESET button twice within
approximately 1 second to put the control module in sleep mode.
(28) Slowly turn the regulator bypass knob counterclockwise to open the regulator bypass valve to
release any remaining pressure.
(29) Turn the regulator bypass knob clockwise to close the regulator bypass valve.
If the control module, power module, HUD, or primary low-pressure warning device does not operate
correctly, remove the SCBA from service.
5.4

Speaker Module Operation

(1) Turn the handwheel counterclockwise to open the cylinder valve and pressurize the system.
(2) Make sure the PASS device and HUD are on.
(3) Attach the regulator to the facepiece.
(4) Hold the facepiece up to your face, or follow the instructions in Section 6.4 "Donning the
Facepiece" to don the facepiece.
(5) Begin breathing air to activate the regulator and start voice amplification.
(6) Talk into the facepiece to make sure the speaker module operates correctly.
(7) Push and hold the on/off button on the speaker module until there is an audible tone and the
speaker module goes off.
(8) Make sure the LED on the speaker module is off.
(9) Push and hold the on/off button on the speaker module until there is an audible tone and the
speaker module comes on.
G1 SCBA 2018 Edition
Functional Tests
30
US