Kohler 14RES

TP-6735 7/17 35Section 3 Troubleshooting
Problem ReferenceCorrective ActionTestPossible Cause
No output
voltage
AC output circuit
breaker open
Check for AC voltage on the
generator side of circuit breaker.
If there is AC voltage on the
generator side of the breaker,
then a problem in the load circuits
is causing the line circuit breaker
to trip.
Check for and correct short
circuits or overloading on the load
side before resetting the circuit
breaker.
—
Alternator or control
system
Perform separate excitation
procedure to isolate the problem
to the alternator or the control
system.
Troubleshoot the alternator or
control system components as
described below and elsewhere in
this table.
Section 5.2
Blown fuse Check fuse F2. Replace fuse F2. Section 5.14.2
Controller
Check the controller settings. Adjust controller settings. Section 4.10
Test the controller as described in
Section 3.6.
See Section 3.6. Section 3.6
Open wiring,
terminal, or pin in
buildup circuit
Check fuses and wiring. Replace fuses or wiring as
necessary.
Section 5.14.2
Section7W/D
Brushes
Inspect brushes. Replace brushes if worn. Section 5.6
Check for brushes sticking in
brush holder or broken brush
spring.
Replace brush spring or brush
assembly.
Section 5.6
Check that brush holder is
securely mounted.
Tighten brush holder screws. Section 5.6
Rotor slip rings dirty
or corroded
Check slip ring condition. Clean slip rings as described in
Section 5.5. Machine slip rings if
necessary.
Section 5.5
Rotor (open,
grounded, or
shorted windings)
Check voltage and continuity as
described in Section 5.4.
Repair or replace rotor if indicated
by the tests.
Section 5.4
Stator (open,
grounded, or
shorted windings)
Check voltage and continuity as
described in Section 5.3.
Repair or replace the stator if
indicated by the test results.
Section 5.3
Aux. winding circuit
breaker tripped
Check the breaker in the service
access area of the controller.
If breaker trips again, check
stator.
Reset breaker.
If breaker trips again, check
stator.
Figure 3-1
Section 5.3
W/D = Wiring Diagram(s) (Section 7) S/S = Generator Set Specification Sheet O/M = Generator Set Operation Manual
I/M = Generator Set Installation Manual Engine S/M = Engine Service Manual
* RDC controller settings can be checked and adjusted using the controller user interface or using a personal computer running SiteTech
software. DC controller settings can only be changed using SiteTech.