Troubleshooting - Dräger PSS 7000 Series Instructions For Use

PSS 7000 Series
Self-contained breathing apparatus with Sentinel 7000
Fitting the cylinder
1. Set the backplate to position S.
2. Check the threads of the cylinder valve port and the first-stage
regulator. Ensure that the O-ring seal (Fig N, Item 1) in the first-stage
regulator is clean and undamaged.
3. Lay the backplate horizontal, with the first-stage regulator uppermost,
and fully extend the cylinder strap.
4. Insert the cylinder through the loop of the strap, and align the valve with
the regulator.
5. Lift the cylinder and backplate into the vertical position (supported on
the end of the cylinder opposite the valve).
6. Tighten the hand wheel of the regulator, using only the thumb and
index finger, until a definite metal-to-metal contact is felt. Do not use
tools or over tighten.
7. Place the unit back into the horizontal position.
8. Take up the slack in the cylinder strap (Fig O).
9. Pull the strap over the cylinder to operate the cam lock (Fig P) and
secure using the hook-and-loop fastening.
Removing the cylinder
1. Close the cylinder valve and press the front button (Fig C, Item 2) to
fully vent the system.
2. Set the backplate to position S.
3. Lay the backplate horizontal, with the cylinder uppermost.
4. Remove the free end of the cylinder strap from the hook-and-loop
fastening.
5. Lift the strap against the cam lock to release the buckle tension and
loosen the strap.
6. Disconnect the cylinder valve from the first-stage regulator.
7. Lift the cylinder away from the first-stage regulator and remove the
cylinder
3.6 Functional testing
WARNING
Failure of the breathing apparatus to meet any of the standards or
parameters described in the functional tests indicates a system fault.
Report the fault to trained service personnel or contact Dräger. Do not use
the breathing apparatus until the fault condition is rectified.
Assemble the breathing apparatus as described in the preparation for use
(see Section 3.1) before commencing any functional testing.
A full functional test includes the self check, the PASS check, and the leak
and EOSTI/whistle tests in this section. During the functional testing check
the display and the audible alarms and do not use the equipment if any of
the following is found:
● Any casing is cracked or broken.
● The LCD display of the user interface cannot be read, or one or more
of the display segments or LEDs is inoperative.
● Audible and/or visual alarms are not functioning.
● Any fault icon is shown.
3.6.1 Self check
NOTICE
If the battery voltage is below a minimum preset voltage, the backlight
illuminates, the low battery icon (Fig H) displays, the unit emits a series of
tones and then switches off. If this occurs, or the unit fails to switch on,
replace the battery (see Section 3.5.2.)
1. Press the left and right buttons of the user interface to activate the self-
check sequence:
a. The unit will commence the self-check. During the sequence, the
system checks alarms and indicators and the display scrolls
through a series of start-up screens. For a full description of the
start-up sequence and options, see Section 3.7.
b. At the end of the sequence, the normal operating screen displays,
and the green LED flashes at approximately one second intervals to
indicate that the Sentinel 7000 has passed the self check and is in the
active mode.
NOTICE
If the cross icon with a fault code displays (Fig Q), the Sentinel 7000 has
failed the self check. Record the fault code and contact Dräger for repair.
3.6.2 PASS Check
1. Press the Yellow button in the centre of the user interface. The distress
alarm sounds, the manual alarm icon ( ) displays and the red and blue
LEDs flash intermittently.
2. Simultaneously press and hold the left and right buttons until the alarm
stops.
3. Immobilize the user interface. After 21 to 25 seconds the pre-alarm
sounds and the backlight flashes. Immediately move the unit to cancel
the alarm.
4. Immobilize the user interface again and do not cancel the pre-alarm.
After approximately 10 seconds of pre-alarm, the main alarm sounds,
the alarm icon ( ) displays, and all of the user interface LEDs flash
intermittently.
5. Simultaneously press and hold the left and right buttons to cancel the
alarm.
6. To switch off, again press and hold the left and right buttons until the
display clears, then immediately release the buttons.
3.6.3 High-pressure leak test
NOTICE
This is not intended as a functional test of HUD. If the HUD fails to operate
as described, see the HUD instructions for use.
1. Place the face mask next to the breathing apparatus (within three feet
of the pressure module).
2. Press the reset button (Fig C, Item 1) to switch off the positive
pressure. Press and rotate the bypass button (Fig C, Item 3) to align
the red spots and then release the button to switch off the bypass.
3. Open the cylinder valve (counterclockwise) slowly, but fully, to
pressurize system. The Sentinel 7000 and HUD systems will activate
as follows:
a. The Sentinel 7000 will emit a single tone and will commence a self-
check sequence (see Section 3.6.1).
b. Up to approximately 45 seconds after the start of the self check, all
six HUD LEDs (Fig G) will flash twice to indicate that the Sentinel
7000 is communicating with the HUD.
Q R
2201
S T
bar
psi
MPa
2191
U V
2279
W H X
psi
3385 2580
Y
psi
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c. Depending on cylinder pressure, some of the four HUD LEDs (red/
amber/green/green) will flash (on for 15 seconds/off for
45 seconds).
4. Close the cylinder valve and observe the user interface display. The
pressure reading shall not decrease more than 300 psi over
20 seconds).
CAUTION
If the breathing apparatus fails this test, or an immediate leak is evident,
do not continue with the test. Vent the pressure, switch off the system and
contact Dräger for repair.
3.6.4 Optional electronic leak test
NOTICE
This is not intended as a functional test of HUD. If the HUD fails to operate
as described, see the HUD instructions for use.
1. Place the face mask next to the breathing apparatus (within three feet
of the pressure module).
2. Press the reset button (Fig C, Item 1) to switch off the positive
pressure. Press and rotate the bypass button (Fig C, Item 3) to align
the red spots and then release the button to switch off the bypass.
3. Press the left button of the user interface to activate the self-check
sequence.
○ Up to approximately 45 seconds after the start of the self check, all
six HUD LEDs (Fig G) will flash twice to indicate that the Sentinel
7000 is communicating with the HUD. The cylinder contents LEDs
will then flash on for 15 seconds and off for 45 seconds
continuously (the number of LEDs is dependent on the cylinder air
pressure).
4. When the perform leak test icon ( ) displays, press the left button.
5. The open valve icon ( ) displays and the radial segments begin to
switch off clockwise.
NOTICE
Open the cylinder valve before the last segment switches off or the low-
pressure icon ( ) will display briefly and the self-check will restart.
If the cylinder pressure is very low and falls below a preset threshold
during pressure stabilization, the low pressure icon (
briefly and the self check will restart.
6. Immediately open the cylinder valve. A single tone sounds and the
screen alternates between the close cylinder valve icon (
press right button icon ( ).
7. Immediately close the cylinder valve and then press the right button.
Pressure stabilizing starts, the wait icon (
segments switch off clockwise.
8. When stabilizing is complete a single tone sounds, the leak test timing
icon ( ) displays, and the radial segments switch off clockwise.
9. When timing is complete a single tone sounds and the test result is
shown:
a. The leak test passed icon ( ) indicates a leak test pass. Observe
the notice below and continue to the EOSTI/whistle test (see
Section 3.6.5).
Instructions for Use
b. The leak test failed icon (
and repair the fault (see Section 4), and then repeat the leak test.
NOTICE
The leak test passed icon (
EOSTI/whistle test must be completed within that time or the unit will reset
and the self check will restart.
3.6.5 EOSTI/whistle test
2330 1. Cover the outlet port of the lung demand regulator with the palm of the
hand and press the front button (Fig C, Item 2).
2.
Carefully lift the palm of the hand to slowly vent the system until the EOSTI
alarms activate, and observe the pressure displayed on the user interface.
NOTICE
The whistle and electronic EOSTI must activate within the preset pressure
range (see Section 8). Due to the activation tolerance, they may not
activate at exactly the same time.
3. Allow the system to vent fully. The display will show zero pressure and all
user interface LEDs (Fig B, Item 3) will flash at approximately one second
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intervals.
4. Press and hold the left and right buttons of the user interface until the
display clears, then immediately release the buttons.
○ After approximately 180 seconds all six HUD LEDs will flash twice
to indicate that it has logged off from the Sentinel 7000.
5. Press the reset button (Fig C, Item 1) to switch off the positive
pressure.
3.7 Sentinel 7000 self check (start-up sequence and
options)
Each time the electronic system switches on (with or without an air cylinder
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fitted), the display scrolls through a series of screens as the electronic
system runs the self check. The start-up sequence is:
1. The unit emits a single tone from the user interface and the second
sounder, and the wait icon (Fig R) displays.
psi
2. The tick icon (Fig S) displays and the blue, red and green LEDs
illuminate.
3. The battery icon (Fig T) displays. The segments around the screen
indicate the condition of the main battery (all segments filled indicates
full battery).
4. The leak test icon (Fig U) displays. Pressing the left button starts the
leak test procedure (see Section 3.6.3).
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5. The personal identity icon (Fig V) displays. Pressing the left button
starts the procedure to read personal identity information from a
personal ID card (see Section 3.7.1).
6. The automatic alarm icon (Fig W) displays and alarm tones sound.
7. End of sequence – The normal operating screen (Fig F) displays and
the green LED flashes at one second intervals.
3.7.1 Personal identity information
Personal identity information (e.g. user name, brigade name, station
number) can be stored in the user interface memory. Once stored, the
information can be scrolled across the screen by pressing the right button
of the user interface during use. The procedure to upload information from
a personal (user) ID card into the user interface memory is shown below.
1. Locate and hold the personal ID card on to the back of the user
interface, directly behind the screen.
2. Press the left and right buttons of the user interface to start the self-
check sequence.
3. When the personal identity screen (Fig V) displays, immediately press
the left button. The screen will briefly illuminate and the radial
segments will begin to switch off clockwise.
4. The system will read, upload and store the data from the transponder
embedded in the card to the memory in the user interface. When the
full data upload is complete, the screen will display the tick icon (Fig X).
5. Press and release the right button of the user interface to check that the
uploaded data is correct. The user details will scroll from right to left across
the screen (Fig Y). Repeat the procedure if the information is incomplete or
inaccurate.
6. If required, switch off by pressing and holding the left and right buttons
of the user interface until the display clears, then immediately release
the buttons.
Further options for personal identity information and additional scrolling
options are available using the PSS 7000 PC Link Module. Contact Dräger
for full details.
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Troubleshooting

The troubleshooting guide shows fault diagnosis and repair information
applicable to breathing apparatus users. Further troubleshooting and
repair information is available in instructions for use supplied with
associated equipment.
Where the troubleshooting guide shows more than one fault or remedy,
carry out repair actions in the order that they appear in the table.
Contact service personnel or Dräger when the remedy information indicates a
service task, or if the symptom remains after all remedy actions have been
attempted.
Symptom
Face mask air leak
) will display
Unsatisfactory
) and
communication
High-pressure air leak or
failed leak test
) displays, and the radial
) indicates a leak test fail. Investigate
) displays for up to three minutes. The
Fault Remedy
Lung demand regulator Renew or lubricate
O-ring leaking O-ring
Head straps not tight Tighten
Exhalation valve leaking Service task
Speech diaphragm Service task
defective
Speech diaphragm Service task
defective
Loose or dirty connector Disconnect, clean
and reconnect
couplings and retest
Faulty hose or Substitute user
component replaceable
accessories and
retest
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