Kohler 38RCL Manual page 71

Problem Possible Cause
Generator set Air cleaner clogged.
engine starts
hard.
Weak battery.
Poor battery connection.
Spark plugs..
Spark plug wire connection loose.
Low fuel pressure.
Engine problem.
Low oil pressure shutdown.
Generator set
stops suddenly.
No fuel or inadequate fuel
pressure.
Fault shutdown.
Air cleaner clogged.
Engine overheated (hot engine).
Engine overloaded.
Blown engine fuse(s).
Remote stop command received
from a remote switch, ATS, or

OnCue
Loss of generator output voltage
to controller.
Engine problem.
Note: I/M = generator set installation manual; O/M = generator set Operation Manual; S/M = service manual; W/D = wiring diagram.
TP-6811 7/16
Plus.
Corrective Action
Clean and/or replace the air cleaner.
Recharge or replace the battery.
Check for DC voltage on lead CHO to the
battery.
Check for 120 VAC on the black and white
leads to controller P5-1 and P5-3 for battery
charging.
Check 120 VAC utility power connection to the
generator set.
Clean and tighten the battery connections.
Regap or replace spark plugs.
Tighten the spark plug connections. Replace
wires if necessary.
Check the fuel supply. Verify that fuel supply
lines and meters are sized to support all gas
appliances.
Troubleshoot/service the engine.
Check for oil leaks. Check the oil level and add
oil if necessary.
Check fuel supply.
Check fuel lines for restrictions or leaks.
Verify that fuel system is sized to supply all gas
appliances.
Identify and correct the cause of the fault
shutdown. Then press OFF to clear the fault.
Clean and/or replace the air cleaner.
Check air intake, oil level, air outlets.
Check the coolant level.
Check the cooling fan fuses, relays, and
operation.
Check temperature sensors.
Reduce the load.
If the system is equipped with a load
management device, troubleshoot the load
management device.
Replace the fuse.
If engine fuses blow repeatedly,
troubleshoot/service the engine.
Check the remote switch position.

Check the ATS/OnCue Plus.
Check controller connections.
Check continuity of AC sensing leads 7 and 8
(1-phase) or 7--8--9 (3-phase).
Troubleshoot/service the engine.
Reference
Generator set
operation manual
W/D Section 8
Section 2.6
Section 5.5
Engine S/M
Section 5.5
Section 5.7, Fault
Messages
Generator set
operation manual
Generator set
operation manual
Section 4, Cooling
System
Section 6.7 and
Engine S/M
—
Load management
device
documentation
Engine service
manuals
W/D, Section 8
Engine service
manuals
Section 5 Troubleshooting 71