Kohler 7.5EOR Service page 37

Is there AC output
when the start
D
button is HELD and
the unit is running?
No
Is there 12VDC at
the exciter field?
No
Replace the
controller
circuit board.
Go to C at the beginning
of the preceding page.
(OPTIONAL)
Separately excite the
generator set to
determine if other
components are
inoperative.
Is AC output voltage at
spec.? (See Section 7,
Separate Excitation.)
Yes
Test the
voltage
regulator.
Figure 6-6 Troubleshooting the Relay Controller Circuit Board (4 of 4)
TP-6073 4/06
Is AC output at the
Yes
correct voltage
(e.g. 120-volts AC)?
Yes
Yes
Test the
stator and
main field
(rotor).
Is there 12VAC output at the
B1/B2 stator winding?
Yes
Replace the
controller
circuit board.
Test the stator,
main field (rotor), and
No
exciter/armature or
brushes.
Is the voltage
regulator
No
fuse functional?
Replace the fuse.
Yes
Test the
voltage
regulator.
Test the stator,
main field (rotor) and
No
exciter/armature or
brushes.
Section 6 Controller Troubleshooting
No
37