Kohler 12RESM1 Manual

TP-6398 4/0728 Section 4 Troubleshooting
4.3 Generator Set Troubleshooting
Figure 4-1 contains generator set troubleshooting,
diagnostic, and repair information. Check for loose
connections before replacing parts.
Problem Possible Cause Corrective Action
The generator set
does not crank.
Battery weak or dead Check power to the battery charger.
Recharge or replace the battery.
Battery charger fuse blown Replace the fuse. Contact an authorized distributor/dealer
for service if fuse blows repeatedly.
Battery connections reversed or poor Check the connections.
Controller fuse (F3) blown Replace the fuse. Contact an authorized distributor/dealer
for service if fuse blows repeatedly.
Relay interface board fuse (F2) blown Replace the fuse. Contact an authorized distributor/dealer
for service if fuse blows repeatedly.
Generator set master switch in the OFF position Move the master switch to the RUN position.
The generator set
cranks but does not
start, starts hard, lacks
power, or operates
erratically.
Air cleaner clogged Clean and/or replace the air cleaner.
Battery weak or dead Check power to the battery charger.
Recharge or replace the battery.
Battery connection poor Clean and tighten the battery connections.
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.
AC circuit breaker tripping because of overload Reduce the load on the generator set.
AC circuit breaker tripping because of short circuit Contact an authorized distributor/dealer for service.
Auxiliary winding fuse (F1) blown Replace the fuse. Contact an authorized distributor/dealer
for service if fuse blows repeatedly.
Low output or
excessive drop in
voltage.
Generator set overloaded Reduce the load.
Generator set stops
suddenly.
Fault shutdown, indicated by fault code on the
controller display.
See Section 2.4.3.
No fuel to generator set Check fuel supply and piping. Contact your fuel supplier.
Controller fuse (F3) blown Replace the fuse. If the fuse blows again, contact the
distributor/dealer.
Generator set master switch in the OFF/RESET
position
Move the switch to the correct position (RUN or AUTO).
Remote stop command received from a remote
switch or ATS
Check the remote switch position.
Engine malfunction Contact the distributor/dealer.
Auxiliary winding fuse (F1) blown Replace the fuse. Contact an authorized distributor/dealer
for service if fuse blows repeatedly.
Controller LED display
is off.
No power to the controller because:
Controller fuse (F3) is blown. Replace the fuse. If the fuse blows again, contact the
distributor/dealer.
Battery voltage to controller is low or zero. Check connections.
Check generator set battery and battery charger. See
Figure 4-2.
Generator set master switch is in the OFF/RESET
position.
Move generator set master switch to the AUTO or RUN
position.
Generator set master switch in AUTO but no start
command has been received since last controller
reset.
No action required (see Section 2.2.1). Controller display
will activate when a remote start command is received or
the generator set master switch is moved to the RUN
position. Use the remote switch to start generator set and
activate the controller display, if desired.
Figure 4-1 General Troubleshooting Chart

Kohler 12RESM1 Specifications

General

Brand	Kohler
Model	12RESM1
Category	Portable Generator
Language	English