TP-6551 2/14
34 Section 4 Troubleshooting
Section or
Publication
Reference*
Recommended ActionsProbable Causes
Trouble Symptoms
Section or
Publication
Reference*
Recommended ActionsProbable Causes
No controller
display
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 S ystem
x x Fuel tank empty or fuel valve shut off Add fuel and move the fuel valve to the ON position. —
x x x x Fuel filter restriction Clean or replace the fuel filter. Eng. O/M
x Fuel solenoid inoperative
Troubleshoot the fuel solenoid.[
Eng. S/M
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
Overcrank shutdown Reset the controller. If the overcrank fault occurs again,
contact the distributor/dealer.
—
x
Transfer switch test s witch in the OFF
position
Move the transfer switch test switch to the AUTO
position.
ATS O/M
x
Wiring, terminals, or pin in the exciter
field open
Check f or 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.[
—
Lube System
x x x
Oil level low Restore the oil level. Inspect the generator set for oil
leaks.
Eng. O/M
x Low oil pressure shutdown Check the oil level. Eng. O/M
x x x x
Crankcase oil type incorrect for
ambient temperature
Change the oil. Use oil with a viscosity suitable for the
operating climate.
Eng. O/M
* Sec./Section—numbered section of this manual; ATS—Automatic Transfer Switch; Eng.—Engine; Gen.—Generator Set; I/M—Installation Manual; O/M—Operation M anual; 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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