Kohler 500EOZCS Operation page 76

Trouble Symptoms
Controller
x x
x x
x
x
x
x x
Alternator
x
x
x
x
x
x x
* Sec./Section—numbered section of this manual; ATS—Automatic Transfer Switch; Eng.—Engine; Gen.—Generator Set; Alt.—Alternator; I/M—Installation Manual; O/M—Operation Manual;
S/M—Service Manual; S/S—Spec Sheet; O/S/M—Operation/Service Manual; W/D—Wiring Diagram
[ Have an authorized service distributor/dealer perform this service.
Probable Causes
Controller circuit board(s) inoperative.
Controller circuit board(s) wiring fault.
Controller fault.
Controller master control button in the
OFF/RESET mode.
Engine start circuit open.
Emergency stop switch activated, if
equipped.
x Controller firmware error.
AC output circuit breaker open.
Transfer switch test switch in the OFF
position.
Wiring, terminals, or pin in the exciter
field open.
Main field (rotor) inoperative (open or
grounded).
Stator inoperative (open or grounded).
x Vibration excessive.
Voltage regulator settings incorrect.
Recommended Actions
Replace the controller.
Check the wiring.
Troubleshoot the controller.[
Press the controller master control RUN or AUTO button.
Press the controller master control RUN button to test the
generator set. Troubleshoot the auto start circuit and the
time delays.
Reset the emergency stop switch.
Review the controller display troubleshooting chart.
Reset the breaker and check for AC voltage at the generator
set side of the circuit breaker.
Move the transfer switch test switch to the AUTO position.
Check for continuity.
Test and/or replace the rotor.[
Test and/or replace the stator.[
Tighten loose components.[
Adjust the voltage regulator.
Section or
Publication
Reference*
Gen. S/M
W/D
Gen. S/M
Section 2
Section 2, W/D,
Gen. S/M
Section 2
Section 4.1
—
—
Alt. O/S/M or W/D
Alt. O/S/M
Alt. O/S/M
—
SiteTech O/M