TM 9-6115-647-14&P
Table 4-2. Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ICC/CRG DOES NOT RECEIVE POWER WHEN POWER UNIT GENERATOR SET IS TURNED ON
(cont).
Step 5.
Disconnect power source jumper cable from generator battery and perform continuity test on
P3
cable (paragraph 4-21) for primary power unit, or P10, P11 cable (paragraph 4-19) and J10
wiring harness (paragraph 4-23 c) for standby power unit.
a.
Replace defective cable or wiring harness (paragraph 4-22 or 4-24 c).
b.
If P3 cable, P10, P11 cable and J10 wiring harness are not defective, go to step 6.
Step 6.
Perform continuity test on J1 wiring harness (paragraph 4-23 a) and J6 wiring harness
(paragraph 4-23 b).
a.
Replace defective wiring harness (paragraph 4-24 a or 4-24 b).
b.
If wiring harnesses are not defective, go to step 7.
Step 7.
Connect power source jumper cable to generator battery. Using multimeter, test for presence
of
24 +3 VDC between TB1-1 and TB-13 for primary unit, or between TB1-1 and TB1-12 for
standby unit.
a.
If 24 +3 VDC is not present, go to step 8.
b.
If 24 +3 VDC is present, go to step 9.
Step 8.
Disconnect power source jumper cable from generator battery and perform continuity test on
control relay/diodes wiring harness (paragraph 4-23 f).
a.
Replace defective wiring harness (paragraph 4-24 f)
b.
If wiring harness is not defective, go to step 9
Step 9.
Disconnect power source jumper cable from generator battery. Disconnect P8 from J8 on
contractor K1 (primary power unit), or P9 from J9 on contractor K2 (standby unit) . Connect
jumper cable to generator battery. Using multimeter, test for 24 +3 VDC between pins A and
B on
P8 or P9, as applicable.
a.
If 24 +3 VDC is not present, go to step 10.
b.
If 24 +3 VDC is present when testing primary power unit, notify higher level of
maintenance for K1 contractor replacement.
c.
If 24 +3 VDC is present when testing standby power unit, go to step 11.
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