TR-300 PAPR Trouble Shooting Guide
Page 1 of 4
Published: December, 2011
Replaces all previously issued until superseded
.
The following table is intended to help the user troubleshoot certain situations that may occur with the 3M
TM
Versaflo™ TR-300 Powered Air Purifying Respirator Assemblies. If you cannot identify your problem in the
chart below, please consult your supervisor or contact 3M Technical Service. There are no user serviceable
parts in the TR-300 motor/blower or battery packs. For additional assistance with the TR-300 PAPR or the TR-
300 batteries and chargers consult their
User Instructions
. Also see 3M Technical Data Bulletin #178 –
Maintenance and Care of 3M Powered Air Purifying Respirator Battery Packs.
Probable Cause Possible Solutions
Fault/Problem
Possible Cause
Possible Solutions
Low airflow alarm (audible and
fan LED flashing).
1) Filter is fully loaded with
particles.
2) Breathing tube is
blocked.
3) Air inlet is covered.
1) Change high efficiency (HE) filter and prefilter or
spark arrestor/prefilter
if used.
2) Check and remove blockage or obstruction.
3) Check air inlet and remove obstruction.
Motor/blower battery alarm
(audible and battery LED)
sounds and flashes.
1) Low battery charge
(voltage).
2) Battery not properly
installed.
3) Battery temperature too
hot (greater than 140ºF or
55ºC).
4) Battery not recognized by
the turbo.
1) Recharge the battery pack.
2) Remove and reinstall battery.
3) Bring to cooler environment and allow battery pack
to cool.
4) Check that correct 3M battery is used. Remove
and reinstall battery.
All alarms on blower unit flash
and sound simultaneously.
1) Software system
malfunction.
2) Motor/fan not turning due
to obstruction.
3) Damaged motor.
1) Power down (turn off) motor/blower to clear
alarms. If unit does not reset contact 3M
Technical Service.
2) Remove filter and check for obstruction in the fan.
3) Replace turbo or contact 3M Technical Service.
No airflow, no alarm(s),
motor/blower does not start.
1) Battery contact is
obstructed or damaged.
2) Battery is completely
discharged.
3) Damaged circuit board.
4) Damaged motor.
1) Check that the battery contact on both the battery
and turbo is clean and that the pins are not bent or
broken. Replace battery pack if contact is
damaged. Replace turbo if the pins are bent,
broken, or otherwise damaged.
2) Fully charge the battery pack.
3) Contact 3M Technical Service.
4) Contact 3M Technical Service.
Airflow indicator shows proper
airflow, no alarm but user
perceives lower flow than
expected.
1) If S-600, S-700 or S-800
Series hoods or M-series
headgear is used, airflow
distribution setting may
not be optimized for user
1) Adjust headgear airflow to optimal setting for users
comfort. Consult the
User Instructions
for the
specific headgear used.
Trouble Shooting
Guide
3M™ Versaflo™ TR-300 Powered Air Purifying Respirator (PAPR) Assemblies
