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TM 5-4210-233-14&P-1
SECTION II. OPERATOR TROUBLESHOOTING PROCEDURES
3-2.
SYMPTOM INDEX. Troubleshooting at the operator level requires you to locate any trouble as quickly as
possible. Once the trouble Is located, perform the corrective action required. If the malfunction Is not listed,
notify your supervisor. Refer to Table 3-3, OPERATOR TROUBLESHOOTING under the number against the
system in this Index to determine the test and corrective action required.
SYMPTOM
Page No.
APU
FAILS TO CRANK .............................................................................................................................. 3-12
CRANKS BUT WILL NOT START .................................................................................................... 3-12
RUNNING UNEVEN AND STALLS FREQUENTLY ............................................................................ 3-12
FIRE PUMP
WILL NOT PRIME .............................................................................................................................. 3-13
WILL NOT ENGAGE .......................................................................................................................... 3-13
VALVES
AIR OPERATED VALVE FAILS TO OPEN OR CLOSE...................................................................... 3-14
VALVES LEAKING WATER/AGENT .................................................................................................. 3-14
WATER PIPING
WATER/AGENT REMAINS IN PIPING AFTER DRAIN OPENED ...................................................... 3-14
DISCHARGE HOSE
WON'T DE-PRESSURIZE .................................................................................................................. 3-14
FOAM DISCHARGE
NO FOAM DISCHARGE AT ANY NOZZLE ........................................................................................ 3-15
WATER TANK
FOAM ENTERING WATER TANK ..................................................................................................... 3-15
FOAM TANK
WATER ENTERING FOAM TANK ..................................................................................................... 3-15
AIR SYSTEM
ALARM SOUNDINGS......................................................................................................................... 3-16
LIGHTS
FAIL TO OPERATE............................................................................................................................ 3-16
3-10
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