Kohler 6.5-27EFOZD

TP-6255 7/0642 Section 6 Troubleshooting
Troubleshooting Chart, continued
Problem Possible Cause Corrective Action Reference
Generator set
Air cleaner clogged Replace element. Section 3
operates
e
r
r
a
t
i
c
a
l
l
y
Governor adjustment incorrect Adjust governor stability. Section 4.4
erra
t
i
ca
l
l
y
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
Inspect valves and valve seats. Engine S/M
Generator set
lacks power
Air intake restriction, inadequate
cooling
Inspect air intakes and exhaust for
obstructions.
Check the air cleaner. Section 3
Generator overloaded Reduce load. Generator Set I/M
Engine not running at rated rpm Check controller settings for unit
configuration (UC) and engine
type (EC).
Adjust governor speed.
Section 7.5
Section 4.4
Engine power loss Refer to the Engine Service
Manual for troubleshooting and
repair instructions.
Engine S/M
Governor malfunction or
misadjustment
Test/readjust governor. Section 4.4
Generator set
overheats
Inadequate cooling Inspect cooling system for
obstructions.
—
Air cleaner clogged Replace element. Section 3
Low output or
i
Generator overloaded Reduce load. Generator Set I/M
p
excessive
drop in
v
o
l
t
a
g
e
Incorrect controller configuration Check and adjust the controller
configuration parameters.
Section 7.5
v
o
l
t
a
g
e
Incorrect controller voltage
settings
Check and adjust the controller
voltage settings.
Section 7.5.3
Alternator or control system Perform separate excitation
procedure to isolate problem to
the alternator or the control
system.
Section 8.2
SCR module Check wiring and connections to
the SCR module.
Check the auxiliary winding fuse
F1 (lead 55).
Replace SCR module and test
voltage.
Section 7.5
Section 7.7
Controller Check the controller settings.
Check the controller fuse, wiring
and connections.
Before replacing the controller,
replace the SCR module and test
voltage.
Section 7.5
Section 7.7
Section 7.11
Rotor (open, grounded, or shorted
windings)
Test and/or replace. Section 8.6
Stator (open, grounded, or
shorted windings)
Test and/or replace. Section 8.7
Low engine speed causing
voltage roll-off
Check system voltage/frequency
(UU) and engine type (EC)
parameters.
Adjust the engine governor speed.
Troubleshoot the engine.
Section 7.5
Section 4.4
Engine S/M