Kohler 38RCLB

TP-6907 5/16 69Section 5 Troubleshooting
Fault Message CheckDescription/ CommentsAction
OB1 CommLoss
(PIM, load management device,
or RXT)
Warning Communications with option board #1
has been lost.
Check RBUS wiring to
inoperative option board.
OB2 CommLoss
(PIM, load management device,
or RXT)
Warning Communications with option board #2
has been lost.
Check RBUS wiring to
inoperative option board.
OB3 CommLoss
(PIM, load management device,
or RXT)
Warning Communications with option board #3
has been lost.
Check RBUS wiring to
inoperative option board.
OB4 CommLoss
(PIM, load management device,
or RXT)
Warning Communications with option board #4
has been lost.
Check RBUS wiring to
inoperative option board.
Oil Pressure Low Shutdwn Shutdown The ECM shutdown the engine and
reported low oil pressure as the fault.
Check the oil level and add oil
if low.
Check the oil pressure sensor
and wiring.
Oil Sens Hi Warning Warning The ECM reported a high voltage error
for the oil pressure sensor.
Check the oil level and add oil
if low.
Check the oil pressure sensor
and wiring.
Oil Sens Lo Warning Warning The ECM reported a low voltage error
for the oil pressure sensor.
Check for oil leaks.
Check the oil level and add oil
if low.
Check the oil pressure sensor
and wiring.
Over Crank Shutdwn Shutdown The controller shut down the generator ,
and ceased cranking, because the
engine was not successfully started
after the completion of the last of the
crank cycles setting delay 15 seconds.
Check fuel supply. Check
cranking circuit. Check
cranking battery.
Troubleshoot engine; see
Engine Service Manuals.
PrimLoopOpn Warning Warning Ignition coil 1 voltage is below normal or
there is an open circuit.
Check the battery voltage.
Check the ignition wires for
shorts.
PrimLoopSht Warning Warning Ignition coil 1 voltage is abnormal. Check the battery voltage.
Check the ignition wires for
shorts.
RBUS ComError Warning Warning The controller has lost communications
with a PIM, or load management device
that had previously been
communicating properly.
Check connection to the PIM,
or load management device.
Spd Sens Flt Shutdwn
(Speed sensor fault)
Shutdown The controller, or the ECM, shutdown
the generator because the speed signal
was lost.
Check speed sensor and
circuitry to ECM.
Volts L1-L2 High Shutdwn [ Shutdown The controller shut down the generator
because the voltage measured from
Phase A to Phase B exceeded the high
limit for a time greater than the delay
setting 2 seconds.
Troubleshoot alternator; see
alternator service manual.
Volts L1-L2 Low Shutdwn [ Shutdown The controller shut down the generator
because the voltage measured from
Phase A to Phase B was greater 5% of
rated, but less than the low voltage
setting for a time greater than the delay
setting 10 seconds.
Troubleshoot alternator; see
alternator service manual.
* Programmable Interface Module (PIM) required
[ Applies during exercise runs and normal operation.