Kohler 14RES

TP-6735 7/1734 Section 3 Troubleshooting
Problem ReferenceCorrective ActionTestPossible Cause
Low output
or
excessive
drop in
voltage
Generator
overloaded
Reduce electrical load and check
operation.
Unplug some lights or appliances
connected to the generator set.
—
Incorrect controller
configuration
Check the controller configuration
parameters. *
Adjust the controller configuration
parameters. *
Section 4.10
Incorrect controller
voltage settings
Check the controller voltage
settings. *
Adjust the controller voltage
settings. *
Section 4.10.4
Alternator or control
system
Perform separate excitation
procedure to isolate problem to
the alternator or the control
system.
Troubleshoot the alternator or
control system as indicated by
test results.
Section 5.2
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
Rotor Test rotor for open, grounded, or
shorted windings.
Replace rotor if faulty windings
are found.
Section 5.4
Stator Test stator for open, grounded, or
shorted windings.
Replace stator if faulty windings
are found.
Section 5.3
Brush connection Check for loose brush
connections.
Check for loose brush mounting.
Check the resistance through the
brushes. Resistance through the
brushes should be low, 0.1--0.2
ohms without meter lead
resistance.
Tighten loose brush connections.
Tighten mounting screws.
Replace brushes if they show
uneven wear or are worn to
one-half their original length.
Section 5.6
Low engine speed
causing voltage
roll-off
Check system voltage/frequency
(Uu) and engine type (Ec)
parameters. *
Check engine speed.
Engine problem.
Change system voltage/frequency
(Uu) and engine type (Ec)
parameters if not correct. *
Adjust engine speed.
Troubleshoot the engine.
Section 4.10.1
Section 4.10.4
Engine S/M
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.