TM 1-1520-238-T-6
9–415
9–172. CIRCUIT PROTECTION SYSTEM (AC ESSENTIAL BUS 1 – CPG STATION) –
9–172
MAINTENANCE OPERATIONAL CHECK (cont)
Task
Result
c. Check for short between:
P461-D and ground,
P461-E and ground,
P461-F and ground.
If short exists, go to paragraph 9–174.
d. Check for short between ground and
P461-L.
If short exists, go to paragraph 9–175.
e. On pilot ELEC PWR panel (fig. 9–162),
place BATT/EXT PWR switch to EXT PWR.
M69-205
BATT / EXT PWR
SWITCH
Figure 9–162.
Pilot ELEC PWR Panel
f. On electrical power distribution box,
check for 115 VAC at (A402):
J32-D,
J32-E,
J32-F,
J32-L.
If 115 VAC is not present, go to paragraph 9–12 to
troubleshoot ac electrical power generation.
g. On pilot ELEC PWR panel, place BATT/EXT
PWR switch to OFF.
h. Attach P461.
i. On pilot ELEC PWR panel (fig. 9–162),
place BATT/EXT PWR switch to EXT PWR.
j. On CPG circuit breaker panel 1 (fig. 9–161),
close AWS AWS AC circuit breaker (CB11),
FC FCC AC circuit breaker (CB16), and
ATTD IND circuit breaker (CB20).
