Kohler 8.5RMY

TP-6049 9/02 19Section 4 Troubleshooting
Section 4 Troubleshooting
This section contains generator set troubleshooting,
diagnostic, and repair information.
Use the following chart to diagnose and correct common
problems. First check for simple causes such as a dead
engine starting battery or an open circuit breaker. The
chart includes a list of common problems, possible
causes of the problem, and recommended corrective
actions.
If the procedures in this manual do not explain how to
correct the problem, contact an authorized distributor/
dealer. Maintain a record of repairs and adjustments
performed on the equipment. Use the record to help
describe the problem and repairs or adjustments made
to the equipment.
Note: Contact an authorized distributor/dealer if the
corrective actions described in the following chart
do not solve the problem.
Problem Possible Cause Corrective Action
The generator set
does not crank.
Battery weak or dead Recharge or replace; check battery charger operation.
Check battery charging circuit (circuit breaker, module, and
wiring), if equipped.
Battery connections reversed or poor Check the connections.
Controller fuse blown Replace the fuse.
Generator master switch in the OFF position Move the master switch to the RUN position.
The generator set
k
b
d
Air cleaner clogged Clean and/or replace the air cleaner.
g
cranks but does not
s
t
a
r
t
,
s
t
a
r
t
s
h
a
r
d
,
l
a
c
k
s
Battery weak or dead Recharge or replace the battery.
s
t
a
r
t
,
s
t
a
r
t
s
h
a
r
d
,
l
a
c
k
s
power, or operates
t
i
l
l
Battery connection poor Clean and tighten the battery connections.
p
,
p
erratically.
Spark plug wire connection loose Check the spark plug wires.
Low oil pressure shutdown Check the oil level.
Fuel pressure insufficient Check the fuel supply and valves.
Engine malfunction Contact the distributor/dealer.
No AC output. AC circuit breaker in the OFF position Place the circuit breaker in the ON position.
p
AC circuit breaker tripping because of overload Reduce the load on the generator set.
AC circuit breaker tripping because of short circuit Correct the cause of the short circuit. Contact the
distributor/dealer.
Voltage regulator fuse blown Replace the fuse.
Low output or
excessive drop in
voltage.
Generator set overloaded Reduce the load.
Generator set stops
d
d
l
Low oil pressure shutdown Check the oil level.
p
suddenly.
Outoffuel Check fuel supply.
Overcrank shutdown Reset the controller. If the overcrank fault occurs again,
contact the distributor/dealer.
Controller fuse blown Replace the fuse. If the fuse blows again, contact the
distributor/dealer.
Overspeed shutdown Reset the controller. If the overspeed fault occurs again,
contact the distributor/dealer.
Generator set master switch in the OFF/RESET
position
Move the switch to the correct position (RUN or AUTO).
Engine malfunction Contact the distributor/dealer.
Figure 4-1 General Troubleshooting Chart