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
28.
GENERATOR SET SHUTS DOWN UNDER FULL LOAD WITH GENERATOR OVERTEMP MALFUNCTION
LIGHT.
Step 1.
Determine if generator set has been running for an extended
period of time above rated load and established operating
temperature.
If generator set has been running above rated load and
established operating temperature, allow generator set to
cool.
Restart and observe proper operating loads and
temperatures.
If generator set has been running within rated limits,
remove engine housing access cover.
Check for obstructions
in generator air intake.
Ensure that generator fan turns
freely.
If generator set continues
to shut down with GENERATOR
OVERTEMP malfunction light, go to Malfunction 16.
29.
GENERATOR SET SHUTS DOWN UNDER FULL LOAD WITH UNDERVOLTAGE MALFUNCTION LIGHT.
Step 1.
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 the calculated load is less than 11kW, go to Step 2.
If the calculated
load exceeds
11kW,
replace
GECM
(paragraph 4-30).
Step 2.
With generator set under full load, measure voltage at magnetic
output contactor S4-A1(+) and S4-B1(-). Multiply that voltage
by reading on OUTPUT CURRENT meter.
If result is more than 150% of the calculated load obtained
in Step 1, check power leads for excessive heat and signs
of arcing (indication of poor/loose connections).
Tighten
connections.
If result is less than 150% of the calculated load obtained
in Step 1, go to Malfunction 17.
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