Table 4-2. Troubleshooting.
TEST OR INSPECTION
ICC/CRG DOES NOT RECEIVE POWER WHEN POWER UNIT GENERATOR SET IS TURNED ON
Disconnect power source jumper cable from generator battery and perform continuity test on
wiring harness (paragraph 4-23 d) or P9 wiring harness (paragraph 4-23 e), as applicable.
Replace defective wiring harness (paragraph 4-24 d or 4-24 e).
Step 11 applies to malfunctions in the standby power unit only.
Using multimeter, test for presence of 24 +3 VDC between contacts A2 on K1 and K2,
contacts B2 on K1 and K2, and between contacts C2 on K1 and K2.
Replace any defective leads between K1 and K2.
Troubleshoot generator set.
Notify higher level of maintenance for K2 contractor replacement.
BOTH POWER UNITS FAIL TO PROVIDE POWER TO ICC/CRG.
Make sure ICC/CRG ON-OFF switch is in ON position.
Turn ON-OFF switch to ON.
Remove two screws and two washers and remove K3 relay from relay socket. Connect power
source jumper cable to generator battery. Using multimeter test for presence of 24 ±3 VDC 8
relay socket between XK3-2 and XK3-7.
If 24 +33 VDC is not present, disconnect jumper cable from battery and replace wire
(TB1-5 to K3-2).
If 24 +33 VDC is present, replace relay (para 4-25).
Disconnect power source jumper cable from generator battery. Disconnect control cable
connector at ICC/CRG. Connect power source jumper cable to generator battery. Using
multimeter, test for presence of 24 +3 VDC at connector between pins S and L or between
Q and L.
If 24 +3 VDC is not present, go to step 4.
If 24 +33 VDC is present, go to step 5.