TP-6323 3/06
38 Section 4 Troubleshooting
Trouble Symptoms
Does not
crank
Cranks but
does not start
Starts hard
No or low
output voltage
Stops
suddenly
Lacks power
Overheats
Low oil
pressure
High fuel
consumption
Excessive or
abnormal noise
Probable Causes Recommended Actions
Section or
Publication
Reference*
Controller
x x
Generator set master switch in the
OFF position
Move the generator set master switch to the correct position
(RUN or AUTO).
Section 2
x x x x
The controller fuse (F3) blown Replace the blown controller fuse. If the fuse blows again,
troubleshoot the controller.[
Section 2, W/D
x x
The relay interface board fuse (F2)
blown
Replace the blown relay interface board fuse. If the fuse blows
again, troubleshoot the controller.[
Section 2, W/D
x x
The auxiliary winding fuse (F1) blown Replace the blown auxiliary winding fuse. If the fuse blows
again, troubleshoot the controller.[
Section 2, W/D
x x
The battery charging alternator fuse
(F4) blown
Replace the blown battery charging alternator fuse. If the fuse
blows again, troubleshoot the controller.[
Section 2, W/D
x x x x x x
The fuel pump fuse (F5) blown Replace the blown fuel pump fuse. If the fuse blows again,
troubleshoot the controller.[
Section 2, W/D
x x x x
The main power relay fuse (F6) blown Replace the blown main power relay fuse. If the fuse blows
again, troubleshoot the controller.[
Section 2, W/D
x x x x x x
The ECM power switched fuse (F7)
blown
Replace the blown ECM power switched fuse. If the fuse blows
again, troubleshoot the controller.[
Section 2, W/D
x
Controller master or start/stop switch
inoperative
Replace the controller master or start/stop switch. —
x Incorrect controller settings
Check and adjust the controller.[
I/M
x
Remote stop command received from
a remote switch
Check the remote switch position.
Cooling System
x x Air openings clogged Clean the air openings. —
x Impeller damaged Replace the impeller. Section 3
x x Seawater strainer clogged or restricted Clean the strainer. Section 3
x
High temperature shutdown Allow the engine to cool down. Then troubleshoot the cooling
system (add coolant).
Sec. 3, Eng. O/M
x Coolant level low Restore the coolant to normal operating level. Section 3
x Thermostat inoperative Replace the thermostat. Eng. S/M
x Cooling water pump inoperative Replace the belt. Replace the water pump. Eng. O/M or S/M
* Sec./Section—numbered section of this manual; ATS—Automatic Transfer Switch; Eng.—Engine; Gen.—Generator Set; I/M—Installation Manual; O/M—Operation Manual; S/M—Service Manual;
S/S—Spec Sheet; W/D—Wiring Diagram
[ Have an authorized service distributor/dealer perform this service.
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