Kohler 4EF

TP-5986 4/0324 Section 6 Controller Troubleshooting
No
Is there AC output
when the start button
is held and the unit is
running?
Yes
Is there 12 volts AC output at
the B1/B2 stator winding?
No
Is there approximately
12VDC at the exciter field?
No
Separately excite the
generator set to
determine if other
components are
inoperative. (See
Section 7.1.2,
Separate Excitation).
Yes
No
Is the voltage
regulator
functional?
Is there AC output
voltage?
Is the stator and rotor
functional?
Is the voltage regulator
fuse functional?
D
No
Yes
Replace the voltage
regulator.
Yes
Replace the fuse.
No
Replace inoperative
components.
Yes
Replace the
circuit board.
Is the stator
functional?
No
No
Replace
the stator.
Yes
Replace the
circuit board.
Figure 6-6 Troubleshooting Relay Controller Circuit Board (4 of 4)