Kohler Power Systems 8RESV Service Manual page 71

Problem Possible Cause
Air intake
Lacks
restriction,
power
inadequate cooling
Generator
overloaded
Spark plug(s)
Spark plug
connections
Fuel selector valve
incorrectly set for
the type of fuel
used.
Low fuel pressure
Fuel line restriction
Fuel regulator
Engine not running
at rated rpm
Engine power loss
Governor
malfunction or
misadjustment
Ignition system
Low output Generator
overloaded
or
excessive
Incorrect controller
drop in
settings
voltage
Incorrect controller
(continues
voltage settings
on next
page) Alternator or control
system
Controller
Rotor
Stator
W/D = Wiring Diagram(s) (Section 7 )
I/M = Generator Set Installation Manual
* RDC2 controller settings can be checked and adjusted using the controller user interface or using a personal computer running SiteTech
software. DC2 controller settings can only be changed using SiteTech.
TP-6881 7/15
Test
Inspect air intakes and exhaust
for obstructions.
Check air cleaner.
Reduce electrical load and check
operation.
Check spark plugs.
Check tightness and condition of
spark plug wires.
Check the fuel selector valve.
Check the controller settings.
Check fuel pressure at carburetor
outlet. Check for adequate fuel
pipe size and meter capacity for
generator set and all gas-fired
appliances.
Check fuel pipe size.
Check function of fuel regulator.
Check controller setting for
engine model. *
Check engine speed.
Refer to the engine service
manual for troubleshooting and
repair instructions.
Test governor.
See the engine service manual for
service procedures.
Reduce electrical load and check
operation.
Check the controller settings. *
Check the controller voltage
settings. *
Perform separate excitation
procedure to isolate problem to
the alternator or the control
system.
Check the controller settings.
Test the controller as described in
Section 4.12.
Test rotor for open, grounded, or
shorted windings.
Test stator for open, grounded, or
shorted windings.
S/S = Generator Set Specification Sheet
Engine S/M = Engine Service Manual
Corrective Action
Clear air intakes and exhaust
area. Maintain clearances shown
on the genset dimension drawing.
Replace air cleaner element.
Unplug some lights or appliances
connected to the generator set.
Regap or replace plug(s).
Tighten or replace spark plug
wires.
Turn the selector valve to the
correct fuel type, LPG or NG. See
Figure 5-32.
Use the controller or SiteTech to
verify the controller fuel settings
for LPG or NG.
Contact fuel supplier to replace
pipe and/or meter as required to
provide sufficient fuel supply
pressure for the generator set and
all gas-fired appliances.
Contact fuel supplier to provide
larger pipe.
Repair or replace fuel regulator.
Select the correct engine model. *
Adjust engine speed.
Refer to the engine service
manual for troubleshooting and
repair instructions.
Adjust governor.
See the engine service manual for
service procedures.
Unplug some lights or appliances
connected to the generator set.
Adjust the controller settings. *
Adjust the controller voltage
settings. *
Troubleshoot the alternator or
control system as indicated by
test results.
Adjust controller settings.
See Section 4.12.
Replace rotor if faulty windings
are found.
Replace stator if faulty windings
are found.
O/M = Generator Set Operation Manual
Section 4 Troubleshooting
Reference
I/M
O/M
—
O/M
Engine S/M
Section 5.13.2
Section 3.3
Section 5.13
Section 5.13
Section 5.13
Section 3.3
Engine S/M
Section 5.10
Engine S/M
—
Section 3.3
Section 3.3
Section 5.3
Section 3.3
Section 4.12
Section 5.5
Section 5.4
71