TM 9-6115-730-24
0011
TROUBLESHOOTING FAILURES WITHOUT FAULT CODES - Continued
SYMPTOM
16.
Undesirable Speed Decrease With Load Increase.
MALFUNCTION
Improper Engine Operation.
CORRECTIVE ACTION
STEP 1.
On EMCP set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
STEP 2.
On resistor assembly A7, verify position of ISOCHRONOUS/DROOP switch
(TM 9-6115-730-10, WP 0006) and (FO-4, sheet 5).
STEP 3.
If in DROOP mode, go to STEP 4.
STEP 4.
On load resistor assembly A7, measure continuity A7-2 A7-1 (FO-4, sheet 4). If
continuity exists, replace ISOCHRONOUS/DROOP switch (WP 0042).
STEP 5
If ISOCHRONOUS/DROOP switch is good, set to DROOP.
STEP 6.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
Turn ENGINE CONTROL switch to MANUAL START.
STEP 7.
Check for continuity between LSM module A4-14 and resistor assembly A7-1.
a.
If continuity is present, proceed to STEP 8.
b.
If continuity is not present, replace main load contactor K1 (WP 0049).
STEP 8.
Try operating in ISOCHRONOUS mode.
a.
Problem caused by improper engine operation. Engine may not be
developing enough horsepower.
b.
Go to Low power/poor or no response to throttle troubleshooting
procedure (SYMPTOM 22).
STEP 9.
Set ISOCHRONOUS/DROOP switch to DROOP.
STEP 10.
Note position of droop potentiometer on LSM A4.
STEP 11.
Rotate potentiometer counterclockwise (decrease droop percentage).
a.
Problem caused by improper engine operation. Engine may not be
developing enough horsepower.
b.
Go to Low power/poor or no response to throttle troubleshooting
procedure (SYMPTOM 22).
STEP 12.
Verify the problem has been resolved.
0011-18
