TR-300 PAPR Trouble Shooting Guide
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Fault/Problem
Possible Cause
Possible Solutions
Airflow indicator shows proper
airflow, no alarm but user
perceives lower flow than
expected, continued
comfort.
2) Breathing tube damaged
or improperly connected.
3) Airway obstructed in
breathing tube or
headgear.
2) Inspect and replace or reconnect breathing tube.
3) Check breathing tube and headgear and remove
blockage or obstruction.
Low airflow as indicated by
airflow indicator but no
alarm(s).
1) Damaged circuit board.
2) Damaged motor.
3) Airflow indicator not held
in vertical position.
4)
Airflow indicator ball or
tube may be damaged or
dirty.
1) Contact 3M Technical Service.
2) Contact 3M Technical Service.
3) Ensure flow indicator is held in vertical position
during airflow check (consult TR-300 PAPR
User
Instructions).
4) Rinse airflow indicator in clean water to help free a
stuck ball. If indicator is damaged replace with a
new airflow indicator.
Motor/blower low airflow
indicator alarms (audible and
fan LED flashing) but airflow
indicator reads adequate flow.
1) Use in high altitude
(above 2600 ft (800m)).
1) Changing the high efficiency (HE) filter prefilter or
spark arrestor/
prefilter (if used)
may help. Contact
3M Technical Service. You may need to use an
alternate PAPR
Motor/blower slow to float the
airflow indicator ball.
1) Ball stuck.
2) Not a malfunction.
3
) Circuit board or other
system failure.
1) Rinse airflow indicator in clean water to help free a
stuck ball.
2) Under normal operation the TR-300 motor/blower
may take up to 1 minute to ramp up to a stabilized
airflow. Review airflow check procedures in the
TR-300 PAPR
User Instructions
.
3) If the motor/blower is taking longer than expected
for normal operation, contact 3M Technical
Service.
Motor/blower does not turn off
when power button is pressed.
1) Power button not held an
adequate length of time.
2) Circuit board
malfunction.
1) To turn off the motor/blower, press and hold the
power button for 2 seconds.
2) Remove battery and reinstall. If unit does not reset
contact 3M Technical Service.
User detects odor or taste of
contaminants or feels eye or
throat irritation.
1) Incorrect respirator for
application and /or
environment.
2) Breathing tube or
headgear damaged.
3) Breathing tube not
connected or improperly
connected to PAPR or
headgear.
4) High efficiency (HE)
Filter not in place or filter
gasket damaged.
5) Nuisance odor carbon on
filter is exhausted.
1) Consult on-site industrial hygienist or safety
director.
2) Inspect breathing tube and headgear per their
User
Instructions.
Replace if damaged. Do not attempt
to repair.
3) Detach breathing tube and reconnect per
User
Instructions.
4) Replace high efficiency (HE) filter.
5) Replace high efficiency (HE)/nuisance odor filter.
Bottom bar of battery pack
charge indicator flashes.
1) Low battery charge
(voltage).
1) Recharge the battery pack.
Battery charge indicator shows
less than 5 bars after charging.
1) Battery is past its service
life.
As the battery pack
ages, it will normally lose
capacity. An older battery
pack may show less than 5
bars after completing a
charge cycle or may not run
as long as a new battery.
1) Replace battery pack.
