TP-6109 6/03
28 Section 4 Troubleshooting
Section or
Publication
Reference*
Recommended ActionsProbable Causes
Trouble Symptoms
Section or
Publication
Reference*
Recommended ActionsProbable Causes
Excessive or
abnormal noise
High fuel
consumption
Low oil
pressure
Overheats
Lacks power
Stops
suddenly
No or low
output voltage
Starts hard
Cranks but
does not start
Does not
crank
Fuel System
x x Fuel tank empty or fuel valve shut off Add fuel and move the fuel valve to the ON position. —
x x x Air in fuel system (diesel only) Bleed the diesel fuel system. Eng. O/M
x x x
Fuel or fuel injectors dirty or faulty
(diesel only)
Clean, test, and/or replace the inoperative fuel injector.[
Eng. S/M
x x x x
Fuel injection timing out of adjustment
(diesel only)
Adjust the fuel injection timing.[
Eng. S/M
x x x
Fuel feed or injection pump inoperative
(diesel only)
Rebuild or replace the injection pump.[
Eng. S/M
Generator
x
AC output circuit breaker open Reset the breaker and check for AC voltage at the generator
side of the circuit breaker.
—
x
Transfer switch test switch in the OFF
position
Move the transfer switch test switch to the AUTO position. —
x
Wiring, terminals, or pin in the exciter
field open
Check for continuity. Gen. S/M, W/D
x
Main field (rotor) inoperative (open or
grounded)
Test and/or replace the rotor.[
Gen. S/M
x Stator inoperative (open or grounded)
Test and/or replace the stator.[
Gen. S/M
x Vibration excessive
Tighten loose components.[
—
x x Voltage regulator out of adjustment Adjust the voltage regulator. Gen. S/M
x x
Voltage regulator fuse blown Replace the voltage regulator fuse, If the fuse blows again,
troubleshoot the voltage regulator.
Gen. S/M
x
Overspeed shutdown Reset the controller. If the unit shuts down again, contact the
distributor/dealer.
Section 2
x x x
Overcrank shutdown Reset the controller. If the unit shuts down again, contact the
distributor/dealer.
Section 2
* 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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