TM 9-6115-730-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
SYMPTOM
18.
Engine Not Properly Sharing Load With Other Generator Sets (Parallel Operation).
MALFUNCTION
Load Sharing Module Malfunction.
CORRECTIVE ACTION
STEP 1.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to MANUAL START.
STEP 2.
Apply full load to generator set.
STEP 3.
Measure voltage LSM A4-22 (+) and A4-23 (-)(FO-4, sheet 2). If voltage is not
6.0 Vdc 1.0 Vdc at full load, perform LSM A4 load gain adjustment (WP 0042)
of each generator set running isochronously not paralleled.
STEP 4.
Check frequency setting of all units when off line with no load. If not identical,
STEP 5.
On Resistor Assembly A7 check position of ISOCHRONOUS/DROOP switch.
STEP 6.
If in DROOP mode, go to STEP 7.
STEP 7.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 8.
On LSM A4, measure continuity between A4-13 and A4-14.
a.
If no continuity, replace ISOCHRONOUS/DROOP switch (WP 0042).
b.
If ISOCHRONOUS/DROOP switch is good, replace main load contactor
STEP 9.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to MANUAL START.
STEP 10.
Try operating in ISOCHRONOUS mode.
a.
Problem caused by improper engine operation. Engine may not be
b.
Go to Low power/poor or no response to throttle troubleshooting
procedure (SYMPTOM 22).
STEP 11.
Verify the problem has been resolved.
0011-20