TM 9-2350-247-10
TROUBLESHOOTING TABLE—Continued
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INITIAL SETUP:
Maintenance Level
Operator
NBC KIT (M548A3)
Table 10. Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. GAS PARTICULATE FILTER
UNIT DOES NOT WORK.
1. Check circuit breaker for gas
particulate filter unit.
If circuit breaker is at OFF position,
place it to ON position (WP 0053 00).
If motor is not working, go to Step 2.
If circuit breaker is at ON, go to Step 2.
2. Listen for precleaner and
particulate filter assembly blower
motor operation.
If operating, go to Step 4. If they are
not operating, go to Step 3.
3. Check to see if precleaner and
particulate filter assembly
electrical cable and ground are
connected.
If loose or not connected, connect
(WP 0053 00). If connected, go to Step
4.
4. Check condition and connection of
filter air hose assembly.
If filtered air hose is pinched or
blocked, remove obstructions. Notify
unit maintenance.
5. Check operation of filter unit. If
gas particulate filter still does not
work, notify unit maintenance.
2. LACK OF AIR FLOW AT CREW
STATION.
1. Check to see if spring clip is down
over air intake openings on air
purifier.
Raise spring clip from air intake
openings on air purifier (WP 0053 00).
2. Check to see if air hoses are
kinked or pinched.
Straighten or replace air hoses
(WP 0053 00).
3. Check to see if there are any loose
air hose connections.
Tighten loose connections
(WP 0053 00).
4. Check to see if precleaner motor is
operating. If motor is not
operating, check if electrical cable
at precleaner is connected
properly.
Reconnect electrical cable
(WP 0053 00). If precleaner motor still
does not operate, notify unit
maintenance.
3. AIR HEATER DOES NOT HEAT
FILTERED AIR.
1. Check to see if heater control knob
is in OFF position. Turn heater
control knob all the way to the
right (WP 0053 00). If heater still
does not heat filtered air, notify
unit maintenance.
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