Kohler 16.5EFOR

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