Relay Controller Flowchart - Kohler Decision-Maker 1 Manual

2.3 Relay Controller Flowchart

Move the
Does the
generator set
engine crank?
master switch
to the RUN
position.
Is the K2 relay
No
LED2 lit?
Is the 10-amp
No
fuse functioning?
Replace
Yes
the fuse.
D Check the condition/
connections of the
generator set
master switch (N, 4,
and 47). See wiring
diagrams.
D Check the battery
condition and
connections.
Do the above items
check out okay?
No Yes
Repair/
Is diode D5
replace the
open?
components.
No
The K2 relay is
faulty; replace
the board.
TP-6356 4/12
Yes
No
Is the K2 relay
Yes
Is the K4 relay
Is the circuit
board ground
connection okay?
No
Repair/replace
the ground
connection
and/or wiring
harness.
Yes
Replace the
circuit board.
No
energized?
Yes
Yes
LED4 lit?
No
Yes
The K4 relay is
defective or has
a bad ground
connection.
Replace the
circuit board.
Check the
continuity of the
harness leads.
Does the engine
Yes
wiring harness
checkout okay?
Repair/replace the
No
wiring harness.
Verify that the K4 relay is
energized by checking for
DC voltage at the K20
relay coil when the
generator set master
switch is in the RUN
position. Is voltage
present at the K20 relay?
Is voltage present at the
No starter motor and/or
starter solenoid?
The K4 relay
is faulty;
replace the
circuit board.
Replace
the K20
relay.
Check battery(ies). Load
test battery(ies).
Repair/replace the starter
motor and/or starter solenoid.
See the engine service
manual.
Section 2 Decision-Makerr 1 Troubleshooting
Go to
A
Replace the
circuit board.
Yes
No
Yes
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