Kohler 4EFCD-Low CO Service Manual

TP-6391 9/0820 Section 3 Troubleshooting
Troubleshooting Chart, continued
Problem ReferenceCorrective ActionPossible Cause
Stops
s
u
d
d
e
n
l
y
BlownF3fuse Verify line circuit. Section 7
su
d
d
en
l
y
(continued)
BlownF5fuse Check ECM ground connection pin 14. Section 7
Operates
i
l
l
Backfire flame arrestor clogged Clean or replace. O/M
p
erratically
Spark plug(s) Replace and regap plugs. O/M
Spark plug wire(s) Replace spark plug wires. Engine S/M
Fuel line restriction Check fuel lines.
—
Ignition system Test and/or replace components. Engine S/M
Inadequate cooling (hot engine
only)
Inspect air inlet and outlet. —
Carbon buildup in engine Clean cylinder head. Engine S/M
Engine valves not seating
correctly
Check cylinder pressures with leakdown test. Inspect
valves and valve seats.
Engine S/M
Lacks
power
Air intake restriction, inadequate
cooling
Inspect air intakes and exhaust for obstructions.
Check air cleaner.
—
Generator overloaded Reduce load. —
Spark plug(s) Replace and regap plug(s). O/M
Spark plug wire(s) Replace spark plug wires. Engine S/M
Engine not running at rated rpm Check controller settings for unit configuration (UC) and
engine type (EC).
Section 4.11.2
Engine power loss Refer to the Engine Service Manual for troubleshooting
and repair instructions.
Engine S/M
Ignition system Test and/or replace. Engine S/M
BlownF5fuse Check ECM ground connection pin 14. Section 7
Overheats
Inadequate cooling Inspect cooling system for air intake obstructions. —
Backfire flame arrestor clogged Clean or replace. O/M
Low output
Generator overloaded Reduce load. —
p
or
excessive
d
r
o
p
i
n
Incorrect controller configuration Check and adjust the controller configuration
parameters.
Section 4.11.2
d
r
o
p
i
n
voltage
Incorrect controller voltage
settings
Check and adjust the controller voltage settings. Section 4.11.2
Alternator or control system Perform separate excitation procedure to isolate
problem to the alternator or the control system.
Section 5.2
SCR module Check wiring and connections to the SCR module.
Check auxiliary winding fuse F1 (lead 55).
Replace SCR module and test voltage.
Section 5.12
Section 4.9
Controller Check controller settings. Check controller fuse, wiring
and connections.
Before replacing controller, replace SCR module and
test voltage.
Section 4.11.2
Section 4.10
Rotor (open, grounded, or
shorted windings)
Test and/or replace. Section 5.4
Stator (open, grounded, or
shorted windings)
Test and/or replace. Section 5.3
Brush connection Check for loose brush connections.
Check the resistance through the brushes. Resistance
through the brushes should be low, 0.1--0.2 ohms
without meter lead resistance.
Section 5.6
Low engine speed causing
voltage roll-off
Check system voltage/frequency (Uu) and engine type
(Ec) parameters.
Troubleshoot the engine.
Section 4.11.2
Engine S/M

Kohler 4EFCD-Low CO Specifications

General

Brand	Kohler
Model	4EFCD-Low CO
Category	Marine Equipment
Language	English