Kohler Decision-Maker 1 Manual page 28

Function
Starting: Place the generator set master switch
in the RUN position or AUTO position with
contacts 3 and 4 closed. The generator set
master switch closes contacts between N
and 47.
Note: Fault shutdowns are inhibited during
startup until K3 energizes.
Running: Alternator winding V0--V7 (P1-12 and
P1-15) produces AC output.
Note: K3 relay must obtain AC output within
30 seconds or overcrank fault occurs.
Stopping: Place the generator set master
switch to the OFF position to open circuit
between N and 47.
Fault shutdowns: Low oil pressure (LOP), high
coolant temperature (HCT). Contacts close
5--8 seconds after reaching shutdown level.
Note: The fault shutdown latches (K5) to keep
the fault lamp lit. Move the generator set master
switch to OFF/RESET.
Fault shutdown: Overspeed (OS). Contacts
close when engine speed reaches shutdown
level.
Note: The fault shutdown latches (K5) to keep
fault lamp lit. Move the generator set master
switch to OFF/RESET.
Fault shutdown: Overcrank (OC). Contacts
close on overcrank (locked rotor) if the speed
sensor signal is absent longer than 30 seconds.
Note: The fault shutdown latches to keep the
fault lamp lit. Move the generator set master
switch to OFF/RESET.
Figure 2-2 Relay Controller Sequence of Operation
28 Section 2 Decision-Makerr 1 Troubleshooting
Relay Contact
Relay Normal Position
K2 Open
K10 Open
K4 Open
K20 Open
K3 Closed
K4 Open
K2 Open
K1 Closed
K1 Closed
K1 Closed
Relay Contact
Action Energizes/Action:
K2 relay and LED2 lights
K10 relay, engine components (fuel
system, governor, ignition, etc.), K4
Close
relay, and LED4 lights
Close Hourmeter
Close K20 relay
Starter solenoid (SS) relay and starter
Close
motor (SM)
K3 relay and LED3 lights
Deenergizes K4 relay and LED4
Open
deenergizes
Deenergizes starter solenoid (SS) and
Open
starter motor (SM)
Deenergizes K2 relay and LED2
deenergizes
Deenergizes engine components;
Open
generator set shuts down
K1 relay, LED1 lights, and fault lamp
Deenergizes engine components;
Open
generator set shuts down
K1 relay, LED1 lights, and fault lamp
Deenergizes engine components;
Open
generator set shuts down
K1 relay, LED1 lights, and fault lamp
Deenergizes engine components;
Open
generator set shuts down
TP-6356 4/12