Generator Set Troubleshooting - Kohler 15REYG Operation

7. Repeat steps 4 through 6 to step through the last 20
faults. Press the Select button to return to the most
recent fault, if desired.
8. To exit, move the generator set master switch to the
OFF/RESET position.
Problem Possible Cause
The generator set
Battery weak or dead
does not crank
Battery connections reversed or poor
Controller fuse (F3) blown
Relay interface board fuse (F2) blown
Engine fuse blown.
Generator set master switch in the OFF
position
The generator set
Air cleaner clogged
cranks but does not
Battery weak or dead
start, starts hard,
Battery connection poor
lacks power, or
Spark plug wire connection loose
operates erratically
Low oil pressure shutdown
Fuel pressure insufficient
Engine fuse blown.
Engine malfunction
No AC output
AC circuit breaker in the OFF position
AC circuit breaker tripping because of overload
AC circuit breaker tripping because of short
circuit
Auxiliary winding fuse (F1) blown
Engine fuse blown.
Low output or Generator set overloaded
excessive drop in
voltage
Generator set stops
Low oil pressure shutdown
suddenly
Out of fuel
Overcrank shutdown
Controller fuse (F3) blown
Overspeed shutdown
Generator set master switch in the OFF/RESET
position
Remote stop command received from a remote
switch, remote digital gauge, or ATS
Engine malfunction
Engine fuse blown.
Auxiliary winding fuse (F1) blown
Figure 4-2 General Troubleshooting Chart
32 Section 4 Troubleshooting

4.4 Generator Set Troubleshooting

Figure 4-2 contains generator set troubleshooting,
diagnostic, and repair information. Check for loose
connections before replacing parts.
Corrective Action
Recharge or replace the battery.
Check the connections.
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Move the master switch to the RUN position.
Clean and/or replace the air cleaner.
Recharge or replace the battery.
Clean and tighten the battery connections.
Check the spark plug wires.
Check the oil level.
Check the fuel supply and valves.
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Contact the distributor/dealer.
Place the circuit breaker in the ON position.
Reduce the load on the generator set.
Contact an authorized distributor/dealer for service.
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Reduce the load.
Check the oil level.
Check fuel supply.
Reset the controller. If the overcrank fault occurs
again, contact the distributor/dealer.
Replace the fuse. If the fuse blows again, contact
the distributor/dealer.
Reset the controller. If the overspeed fault occurs
again, contact the distributor/dealer.
Move the switch to the correct position (RUN or
AUTO).
Check the remote switch position.
Contact the distributor/dealer.
Replace the fuse. Contact an authorized
distributor/dealer for service if fuse blows
repeatedly.
Replace the fuse. Contact an authorized distributor/
dealer for service if fuse blows repeatedly.
TP-6728 10/11