Relay Descriptions - Kohler Decision-Maker 1 Manual

3.4 Relay Descriptions

See Figure 3-11 for controller and generator set relay
descriptions and functions.
troubleshoot the generator set in conjunction with the
controller flow charts in Section 3.5.2. Use Section 3.5
and the appropriate wiring diagram for additional
information.
Relay Description/Function
Emergency stop relay energizes continuously except
K1
during emergency stop conditions
K2 Crank relay energizes during crank mode
K3 Run relay energizes during crank and run modes
Engine ECM control relay energizes during crank
K6
and run modes
Diagnostic box control relay energizes when control
K11
box switches are energized (ECM engines)
K20 Starter solenoid energizes during crank mode
Figure 3-11 Relay Descriptions and Functions
1
6 5 4 3
1. K1 relay: emergency stop
2. LED1 (K1 relay)
3. K3 relay: control relay (run)
4. LED3 (K3 relay
5. K2 relay: control relay (crank)
6. LED2 (K2 relay)
Figure 3-12 Main Circuit Board GM28725/GM64497
Relays
48 Section 3 Decision-Makerr 3+ Troubleshooting
Use this information to
2
GM28725-D
Note: Some generator set models may show relays K6,
K11, and K20 with different designations. See the
respective generator set wiring diagram manual.
Location Illustration
Main circuit board Figure 3-12
Main circuit board Figure 3-12
Main circuit board Figure 3-12
Junction box Figure 3-13
Junction box Figure 3-13
Engine Figure 3-14
5
1. Normally open (87)
2. Normally closed (87A)
3. Coil (85)
Figure 3-13 K6/K11 Relay
Figure 3-14 Starter Solenoid K20 Relay
Energizes/Action:
LED1 lights.
Energizes K20 relay
LED2 lights.
Energizes ignition, fuel solenoid, fuel
pump, choke, instrumentation, voltage
regulator, etc.
LED3 lights.
ECM/Governor control circuit.
Diagnostic box circuit.
Starter motor.
1 2
3
4
4. Common (30)
5. Coil (86)
C
S
I
TP-6356 4/12
TP-6356-3
TP-5353-6