Kohler 38RCL Manual page 72

Problem Possible Cause
Generator set
Air cleaner clogged
operates
Inadequate cooling (hot engine
erratically
only)
Engine fuel system problem
Generator set Inadequate cooling
overheats
Air cleaner clogged
Generator set is Exhaust system leaks
noisy
Engine not running smoothly
Broken or damaged vibromount(s) Check and replace as necessary.
Loose or vibrating sheet
metal/housing
Exhaust piping or air inlets/outlets
not securely installed
Excessive engine/generator
vibration
High generator Incorrect controller settings
output voltage
Incorrect controller voltage
settings
Loose voltage sensing
connections
Controller
Generator set Air intake restriction
lacks power
Low fuel pressure.
Inadequate cooling
Spark plugs.
Spark plug connections.
Engine overloaded
Engine not running at rated rpm
Note: I/M = generator set installation manual; O/M = generator set Operation Manual; S/M = service manual; W/D = wiring diagram.
72 Section 5 Troubleshooting
Corrective Action
Replace element.
Inspect air inlet and outlet.
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Refer to the engine service manual for
troubleshooting and repair information.
Inspect cooling system for obstructions.
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Replace element.
Check and repair as necessary.
See "Generator set operates erratically" in this
table.
Retighten screws, replace rivets.
Inspect for loose parts and secure if necessary.
Check, rotor, crankshaft, bearing, etc.
(disassembly of engine and/or alternator may
be required).
Check and adjust the controller configuration
parameters.
Check and adjust the controller voltage settings
and voltage calibration.
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.
Check wiring and connections.
Inspect air intakes and exhaust for obstructions.
Check the air cleaner.
Check the fuel supply, regulators, fuel lines, and
valves.
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Check the spark plugs. Regap or replace if
necessary.
Tighten connections. Replace spark plug wires
if necessary.
Reduce load.
If the system is equipped with a load
management device, troubleshoot the load
management device.
Check controller settings for engine speed and
generator set frequency.
Reference
Section 2.4
—
Section 4, Cooling
System
Engine S/M
—
Section 4, Cooling
System
O/M
—
See "Generator set
operates erratically"
in this table
—
—
—
See the Alternator
S/M and Engine S/M
Section 3.6
Sections 3.6, 3.7,
and 6.5
W/D, Section 8
W/D, Section 8
Section 2.4
Section 4, Cooling
System
Section 2.6
Section 2.6
Generator Set I/M
Load management
device
documentation
Section 6.6
TP-6811 7/16