Kohler 38RCLB

TP-6907 5/16 75Section 5 Troubleshooting
Reference
Corrective ActionPossible CauseProblem
Generator set
operates
erratically
Air cleaner clogged Replace element. Section 2.4
Inadequate cooling (hot engine
only)
Inspect air inlet and outlet.
—
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Section 4, Cooling
System
Engine fuel system problem Refer to the engine service manual for
troubleshooting and repair information.
Engine S/M
Generator set
overheats
Inadequate cooling
Inspect cooling system and ventilation for
obstructions.
—
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Section 4, Cooling
System
Air cleaner clogged Replace element. O/M
Generator set is
noisy
Exhaust system leaks Check and repair as necessary. —
Engine not running smoothly See “Generator set operates erratically” in this
table.
See “Generator set
operates erratically”
in this table
Broken or damaged vibromount(s) Check and replace as necessary. —
Loose or vibrating sheet
metal/housing
Retighten screws, replace rivets.
—
Exhaust piping or air inlets/outlets
not securely installed
Inspect for loose parts and secure if necessary. —
Excessive engine/generator
vibration
Check, rotor, crankshaft, bearing, etc.
(disassembly of engine and/or alternator may
be required).
See the Alternator
S/M and Engine S/M
High generator
output voltage
Incorrect controller settings Check and adjust the controller configuration
parameters.
Section 3.6
Incorrect controller voltage
settings
Check and adjust the controller voltage settings
and voltage calibration.
Sections 3.6, 3.7,
and 6.4
Loose voltage sensing
connections
Check connections: stator leads 7 and 8 (for
1-phase models) or leads 7, 8, and 9 (for
3-phase models) and P2 controller connection.
W/D, Section 8
Controller Check wiring and connections. W/D, Section 8
Generator set
lacks power
Air intake restriction Inspect air intakes and exhaust for obstructions.
Check the air cleaner.
Section 2.4
Low fuel pressure. Check the fuel supply, regulators, fuel lines, and
valves.
Inadequate cooling Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Section 4, Cooling
System
Spark plugs. Check the spark plugs. Regap or replace if
necessary.
Section 2.6
Spark plug connections. Tighten connections. Replace spark plug wires
if necessary.
Section 2.6
Engine overloaded
Reduce load. Generator Set I/M
If the system is equipped with a load
management device, troubleshoot the load
management device.
Load management
device
documentation
Engine not running at rated rpm Check controller settings for engine speed and
generator set frequency.
Section 6.5
Note: I/M = generator set installation manual; O/M = generator set Operation Manual; S/M = service manual; W/D = wiring diagram.