Kohler 18RESL User Manual

TP-6519 8/17 31Section 3 Troubleshooting
Problem ReferenceCorrective ActionTestPossible Cause
Lacks
power,
continued
Engine not running
at rated rpm
Check controller settings for unit
configuration (UC) and engine
type (EC). *
Check engine speed.
Reset controller settings for unit
configuration (UC) and engine
type (EC). *
Adjust engine speed.
Section 4.5
Engine power loss Refer to the engine service
manual for troubleshooting and
repair instructions.
Refer to the engine service
manual for troubleshooting and
repair instructions.
Engine S/M
Governor
malfunction or
misadjustment
Test governor. Adjust governor. Section 5.9
Ignition system See the engine service manual for
service procedures.
See the engine service manual for
service procedures.
Engine S/M
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 4.5
Incorrect controller
voltage settings
Check the controller voltage
settings. *
Adjust the controller voltage
settings. *
Section 4.5.4
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
SCR module Check wiring and connections to
the SCR module.
Check auxiliary winding fuse F1
(lead 55).
Replace SCR module and
recheck voltage.
Tighten connections and/or
replace wiring as required.
Replace auxiliary winding fuse F1
(lead 55).
Replace SCR module and
recheck voltage.
Section 7
Section 5.13.2
Section 4.8
Controller
Check the controller settings. Adjust controller settings. Section 4.5
Test the controller as described in
Section 3.4.
See Section 3.4. Section 3.4
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 4.5.1
Section 4.5.4
Engine S/M
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.
—
* ADC-RES controller only. The DC-RET controller settings cannot be adjusted in the field.
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

Kohler 18RESL Specifications

General

Brand	Kohler
Model	18RESL
Category	Portable Generator
Language	English