TM 9-6115-730-24
0008
TROUBLESHOOTING USING AL FAULT CODES - Continued
NOTE
This alarm code should occur only when the generator sets are operated in parallel mode.
SYMPTOM
16.
AL 17
MALFUNCTION
Improper Generator or Bus Voltage - Paralleling fault code
CORRECTIVE ACTION
STEP 1.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
Turn the ENGINE CONTROL switch to MANUAL START.
STEP 2.
On generator set GSC displays, check the voltages on for both generator sets
and record output voltages for all phases. All phases should be the same for
both generator sets.
STEP 3.
On EMCP of both generator sets, set ENGINE CONTROL switch to
OFF/RESET. Battery Disconnect switch to OFF; DEAD CRANK SWITCH to
OFF.
STEP 4.
Check both generator sets and verify that all cables are connected properly and
all load terminal connections are tight per TM 9-6115-730-10.
STEP 5.
Parallel generator sets per TM 9-6115-730-10.
STEP 6.
Verify the problem has been resolved.
STEP 7.
If problem remains, set AC CIRCUIT INTERRUPTER switch on GSC to OPEN.
a. On generator set #1, set AC CIRCUIT INTERRUPTER switch on GSC to
CLOSED.
b. Measure voltage at output load terminal lugs and record.
c.
On generator set #1, set AC CIRCUIT INTERRUPTER switch on GSC to
OPEN.
d. On generator set #2, set AC CIRCUIT INTERRUPTER switch on GSC to
CLOSED.
e. Measure voltage at output load terminal lugs and record.
f.
On generator set #2, set AC CIRCUIT INTERRUPTER switch on GSC to
OPEN.
STEP 8.
If voltages at output load terminal lugs are different, adjust generator set voltages
equal to each other.
STEP 9.
Parallel generator sets per TM 9-6115-730-10.
STEP 10.
Verify the problem has been resolved.
STEP 11.
If not resolved, check wiring at LSM A4.
STEP 12.
If wiring at LSM A4 is good, replace LSM A4 (WP 0042).
0008-11