SECTION II. OPERATOR TROUBLESHOOTING PROCEDURES

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