Kohler 8.5RMY

TP-6049 9/02 7Section 2 Operation
2.3.4 Fault Shutdowns
The generator set shuts down automatically under the
fault conditions listed in Figure 2-3 and cannot be
restarted until the fault condition is corrected. The
generator set shutdown switches automatically reset
when the problem is corrected. The high engine
temperature switch automatically resets when the
generator set cools.
After a fault shutdown leave the generator set master
switch in the RESET/OFF position for a couple of
seconds before attempting to restart the generator set.
Fault Description
High engine
temperature
Shutdown occurs 5 seconds after the fault.
The high engine temperature shutdown does
not function during the first 5 seconds after
startup.
Low oil pressure Shutdown occurs 5 seconds after the fault.
The low oil pressure shutdown does not
function during the first 5 seconds after
startup.
Note: The low oil pressure shutdown does
not protect against low oil level. Check the oil
level at the engine.
Overcrank Shutdown occurs after 30 seconds of cyclic
cranking. The factory sets the circuit board
for three starting attempts of 8 seconds each
(crank 8 seconds, wait 3 seconds, crank 8
seconds, wait 3 seconds, crank 8 seconds).
The generator set also shuts down if the
output line voltage is lost. Shuts down 1
second after the fault is detected.
Overspeed Shutdown occurs immediately when the
governed frequency on 50 and 60 Hz models
exceeds 70 Hz.
Figure 2-3 Fault Shutdowns
2.3.5 Resetting the Controller after a
Fault Shutdown
Use the following procedure to restart the generator set
after a fault shutdown.
1. Disconnect the generator set from the load using
the line circuit breaker or ATS. See the safety
precautions at the beginning of this section before
proceeding.
2. Correct the cause of the fault shutdown. See the
safety precautions at the beginning of this section
before proceeding.
3. Start the generator set by moving the generator set
master switch to RESET/OFF and then to RUN.
4. Verify that the cause of the shutdown has been
corrected by test operating the generator set.
5. Reconnect the generator set to the load using the
line circuit breaker or AT S.
6. Move the generator set master switch to the AUTO
position for startup by remote transfer switch or
remote start/stop switch.
2.4 Circuit Protection
See Figure 2-1 for the line circuit breaker, controller
fuse, and voltage regulator fuse locations.
Note: If the generator set circuit breaker trips or the
fuses blow repeatedly, see Section 4,
Troubleshooting, for possible causes.
Line Circuit Breaker. A line circuit breaker interrupts
the generator output in the event of a fault in the wiring
between the generator and the load. See Figure 2-4 for
the circuit breaker ratings. If the circuit breaker trips,
reduce the load and switch the breaker back to the ON
position. With the breaker in the OFF position the
generator set runs but the generator output is
disconnected from the load.
Model
Circuit Breaker
Rating, Amps
8.5RMY 40
11RMY 50
Figure 2-4 Line Circuit Breakers
Controller Fuse. A replaceable 10-amp fuse protects
the controller circuitry. If the generator set does not
crank, check the battery and battery connections and
then check the controller fuse. Replace the fuse if it is
blown.
Voltage Regulator Fuse. A replaceable 10-amp fuse
protects the voltage regulator circuitry. The generator
set shuts down if the fuse blows. When the operator
starts a generator set with a blown voltage regulator
fuse, the generator set typically starts and then shuts
down in 8 seconds.
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