Kohler 11.5EFOZ, Руководство по обслуживанию

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TP-6071 3/00 20 Section 6 Controller Troubleshooting
6.2 Controller Sequence of
Operation
Sections 6.2.1--6.3.3 describe the controller sequence
of operation during generator start, run, stop, and fault
shutdown modes. Use the LEDs on the controller circuit
board to assist in the troubleshooting process.
An
illuminated LED indicates that the respective relay is
receiving power; the LED does not indicate whether that
relay is energized.
Refer to the wiring diagrams in
Section 10 to assist in the troubleshooting procedure.
6.2.1 Start
Close the start/stop switch between N and 47 (local or
remote starting).
The K2 relay energizes (LED2 lights).
The normally open K2 contacts close to energize the K3
relay (LED3 lights), K25 (fuel solenoid) relay, controller
hourmeter, and generator armature exciter field.
The normally open K3 relay contacts close to energize
the K20 (starter) relay. The normally open K20 relay
contacts close to energize the S relay (starter solenoid).
The normally open S relay contacts close to energize
the starter motor.
The normally open K25 contacts close to energize the
fuel solenoid and the battery charging alternator (BCA).
As the engine builds oil pressure during cranking, the
normally closed LOP contacts open.
6.2.2 Run
The K1 relay energizes (LED1 lights) when the B1 and
B2 windings receive AC output from the stator main
field.
After a 5--10 second time delay, the K5 relay
energizes (LED5 lights).
Note: The bridge rectifier (BR1) and the voltage
regulator (VR1) provide 12 volts DC to the K1 and
K5 relays.
The stator winding V1-V4 provides a voltage sensing
source to the voltage regulator.
The normally open K1 contacts close to maintain
voltage to the K2 relay (LED2 remains lit).
The normally open K2 contacts remain closed to
maintain voltage to the fuel solenoid and controller
hourmeter.
The normally open K1 contacts close to energize the
(optional) oil pressure, coolant temperature, battery
voltmeter, and hourmeter gauges and the generator
“ON” light.
The normally open K5 contacts close to permit the high
water temperature (HWT), high exhaust temperature
(HET), and low oil pressure (LOP) switches to function.
Note: The low oil pressure (LOP) switch contacts open
when the engine develops proper oil pressure.
One set of normally closed K1 contacts opens to
disconnect the circuit to the (+) connection of the exciter
fields (field flashing).
A set of normally closed K1 contacts opens to
disconnect the circuit to the negative (--) connection of
the exciter field (field flashing). The normally closed K1
contacts open to deenergize the K3 relay (LED3 goes
out) and prevent accidental reenergizing of the starter
motor. The K3 contacts open to deenergize the K20
relay. The K20 contacts open to deenergize the S relay.
The S contacts open to deenergize the starter motor.
When the generator set is running, the start switch
contacts N and 47 open by releasing the start/stop
rocker switch.
6.2.3 Stop
Close the start/stop switch between N and 43 (local or
remote).
The K4 relay energizes (LED4 lights).
The normally closed K4 contacts open to deenergize the
K25 relay. The closed (normally open) K25 contacts
open to deenergize the fuel solenoid.
The normally open K4 contacts close to maintain a
ground to the K4 relay.
As the generator set shuts down, the K1 relay
deenergizes (LED1 goes out). The normally open K1
contacts open to deenergize the K2 relay (LED2 goes
out). The normally closed K2 contacts close to ground
the circuit to the K4 relay until the generator set comes to
a complete stop.