TM 9--2350--292--10
AUXILIARY POWER UNIT TROUBLESHOOTING
0084 00
THIS WORK PACKAGE COVERS:
Auxiliary Power Unit engine fails to start
0084 00--1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auxiliary Power Unit starts, but fails to keep running
0084 00--1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BATT--GEN gauge reads in yellow or lower red with APU running and APU GEN switch ON
0084 00--1
. . . . . . . . .
INITIAL SETUP:
Personnel Required
Three
References
WP 0071 00
WP 0112 00
WP 0101 00
WP 0033 00
AUXILIARY POWER UNIT ENGINE FAILS TO START
Step 1. If APU will not crank, check BATT--GEN gauge for low battery charge.
Slave start the vehicle and charge batteries (WP 0071 00).
Step 2. Check and ensure APU GEN switch is in the OFF position.
Place APU GEN switch in the OFF position.
Step 3. Check air intake for restrictions.
Remove any restrictions and clean air filter (WP 0112 00).
Step 4. Use fuel gauge to check rear fuel tank fuel level.
Refuel vehicle.
Step 5. If problem still exists, notify unit maintenance (AUXILIARY POWER UNIT ENGINE FAILS TO START).
AUXILIARY POWER UNIT STARTS, BUT FAILS TO KEEP RUNNING
Step 1. Check for water in the fuel filters.
Drain fuel filters for condensation (WP 0101 00).
Step 2. Check air intake for restrictions.
Remove any restrictions and clear air filter (WP 0112 00).
Step 3. If problem still exists, notify unit maintenance (AUXILIARY POWER UNIT FAILS TO KEEP RUNNING).
BATT--GEN GAUGE READS IN YELLOW OR LOWER RED WITH APU RUNNING AND APU GEN SWITCH ON
Step 1. Remove air intake grille above voltage regulator (WP 0033 00).
Step 2. Press reset button on voltage regulator.
Step 3. If problem still exists, notify maintenance (BATT/GEN GAUGE READS IN YELLOW OR LOWER RED
WITH APU RUNNING AND APU GEN SWITCH ON).
END OF TASK
0084 00--1/2 blank
