Kohler 15CCO Service Manual page 65

Problem
GENERATOR
No Optional AC output
generator circuit breaker open
output
voltage
Optional AC circuit
breaker tripping due to
No battery voltage to
Open flashing diode
(D4 or D7; D5 or D8)
K1 relay (Normally
Closed) contacts open
Defective rotor (open,
grounded, or shorted
Defective stator (open,
grounded, or shorted
Defective exciter field
(3-phase models only)
(3-phase models only)
(3-phase models only)
(1-phase models only)
TP-5606 6/02
Possible Cause
or defective
overload on unit
field during
cranking
windings)
windings)
Defective exciter
armature
Defective diode
board
Brushes sticking
in holder
Corrective Action
Check position of
circuit breaker
Check AC voltage on
generator side of circuit
breakers
Reduce load
Reset and attempt
startup
Check flashing
current
Check for open or
shorted diode (a good
diode has high
resistance one way
and low resistance the
other way, when tested
with ohmmeter)
Check continuity
Test and/or replace
Test and/or replace
Test and/or replace
Test and/or replace
Check for open
or shorted diode
(a good diode has
high resistance one
way and low resistance
the other way, when
tested with ohmmeter).
Check alignment
Reference
Section 2. Circuit
Protection
Section 9. Wiring Diagrams
Section 3. Wattage
Requirement
Section 7. Separate
Excitation Test
Section 9. Wiring Diagrams
Section 7. Circuit Board
Section 9. Wiring Diagrams
Section 7. Circuit Board
Section 7. Rotor
Section 7. Stator
Section 7. Exciter Field
Section 8. Disassembly/
Assembly
Section 7. Exciter Armature
Section 8. Disassembly/
Assembly
Section 8. Disassembly/
Assembly
Section 8. Brushes
General Troubleshooting 4-13