ARMY
TM 5-6115-612-12
MARINE CORPS TM 6115-12/7
AIR FORCE
TO 35C2-3-471-1
4-10.
GENERAL. (cont)
NAVY
AG-320B0-0MM-000
Table 4-3.
Organizational Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
24.
GENERATOR SET
LIGHT.
Step 1.
25.
GENERATOR SET
Step 1.
Reconnect connector P2 to GECM.
Remove backshell of connector
P1.
Measure AC voltage between P1-B and P1-C while rotating
VOLTAGE ADJUST knob.
If voltage adjusts, replace GECM in accordance with
paragraph 4-30.
If voltage does not adjust,
refer to next higher level of
maintenance for generator replacement.
SHUTS DOWN UNDER FULL LOAD WITH ENGINE OVERTEMP MALFUNCTION
Ensure that operating load and temperature limits were not
exceeded.
If load and temperature were within limits, go to
Malfunction 8.
If limits were exceeded,
allow generator set to cool.
Restart and observe correct operating limits.
SHUTS DOWN UNDER FULL LOAD WITH OVERSPEED MALFUNCTION LIGHT.
Determine if there was a noticeable increase or decrease in
engine RPM just prior to shutdown.
This condition can be
identified by a change in pitch while engine is running. A
higher pitch indicates an increase in RPM.
If engine RPM decreased,
calculate load on generator set.
This is determined by multiplying the reading on the
VOLTAGE meter by the reading on the OUTPUT CURRENT meter.
If load is 11 kW, go to Malfunction 13 and perform Steps
1,3, and 4.
If load is less than 11 kW, go to Malfunction
29, Step 2.
If load is greater than 11 kW, replace GECM
(paragraph 4-30.)
If engine RPM increased,
verify that load limits were not
exceeded.
If established operating load limits were
exceeded,
allow generator set to cool.
Restart generator
set and operate within established operating limits. If
established operating load limits were not exceeded, go to
Malfunction 13, Step 3.
4-45
