TM 9-6115-730-24
0009
TROUBLESHOOTING USING GSC FAULT CODES - Continued
NOTE
This output varies from +5 Vdc to -5 Vdc and is sent to Load Sharing Module A4 to generate the
signal sent to the engine controller to set and control the speed of the engine. If the
synchronization is disabled, the output will be approximately 0 Vdc.
NOTE
Set two generators in parallel mode per TM 9-6115-730-10. Generator set A will be the test unit
(with the fault) and generator set B will be the load unit.
SYMPTOM
59.
CID 1038 FMI 02
CID 1038 FMI 03
CID 1038 FMI 04
MALFUNCTION
Speed Adjust 1 Output (P7-27 (+) and P7-28 (-).
FMI 02 - Erratic, Intermittent, or Incorrect Signal.
FMI 03 - Voltage Above Normal.
FMI 04 - Voltage Below Normal.
CORRECTIVE ACTION
STEP 1.
Turn the ENGINE CONTROL switch to OFF/RESET. Set Battery Disconnect
Switch to OFF. Set DEAD CRANK SWITCH to OFF on generator set A. Set
SYNC MODE switch to OFF.
STEP 2.
Disconnect wire from LSM A4-24 per FO-4, sheet 2, on generator set A.
STEP 3.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
Turn the ENGINE CONTROL switch to COOL DOWN/STOP, on generator set A.
STEP 4.
Measure the voltage on the end of the wire (A4-24+) with respect to A4-25.
as necessary.
b. If harness is good continue to the next step.
STEP 5.
On both generator sets, set Battery Disconnect Switch to ON. Set DEAD CRANK
SWITCH to NORMAL. Turn the ENGINE CONTROL switch to MANUAL START.
Set SYNCH switch to SEMI-AUTOMATIC. Close load contactor on generator set
B.
STEP 6.
Adjust the engine speed so the frequency, on generator set A is 1 Hz higher than
what is on the load bus (generator set B).
STEP 7.
Allow the voltage to stabilize.
0009-50
