Table 3-3. Troubleshooting (Cont)
MALFUNCTION
16.
17.
18.
19.
20.
21.
22.
Ac voltage too high
or too low.
Ac voltmeter indi-
cates voltage but
frequency is off
scale to left.
Ac voltage
fluctuates.
Erratic frequency
indicator on fre-
quency meter.
Frequency meter
fails to register.
Kilowatt. meter fails
to register.
Engine generator set
shuts down, NO FUEL
indicator illuminates,
but sufficient fuel re-
mains in main tank
for operation.
PROBABLE CAUSE
a.
b.
a.
b.
c.
d.
a.
b.
c.
d.
a.
b.
a.
b.
c.
d.
e.
—
Defective VOLTAGE
ADJUST rheostat.
Engine speed too low.
Defective meter or
transducer.
Loose electrical
connection.
Defective VOLTS-AMPS
switch.
Defective VOLTAGE
ADJUST rheostat.
Defective ac voltmeter.
Air in fuel.
Defective nozzle holder
assembly.
Improperly adjusted
valves.
Defective frequency
transducer or fre-
quency meter.
Frequency meter
defective.
Frequency transducer
defective.
Kilowatt meter defective,
Defective day tank
float switch.
Defective fuel solenoid
valve.
Clogged fuel filter or
strainer.
Clogged fuel transfer
pump screens.
Defective fuel transfer
pumps.
CORRECTIVE ACTION
a.
b.
a.
b.
c.
d.
a.
b.
c.
d.
a.
b.
a.
b.
c.
d.
e.
Replace rheostat (para 3-110).
Adjust frequency adjust control (precise).
Increase speed manually (utility).
Replace meter and transducer (para 3-111).
Inspect harness and connectors and repair
(para 3-139).
Replace switch (para 3-112).
Replace Rheostat (para 3-110).
Replace meter (para 3-105).
Bleed fuel system (para 3-56).
Replace nozzle holder assembly (para 3-201).
Adjust valves (para 3-220).
Replace transducer and meter (para 3-111).
Replace meter and transducer (para 3-111).
Replace frequency meter and transducer
(para 3-111).
Replace meter (para 3-106).
Replace float switch (para 3-159).
Replace solenoid valve (para 3-158).
Service filter and strainer. (para 3-34).
Service fuel transfer pumps (para 3-165).
Replace pumps (para 3-165).
3-25
