Kohler 6VSG Service Manual page 63

Problem Possible Cause
No output DC output circuit
voltage breaker open
Alternator
Controller
Open wiring,
terminal, or pin in
buildup circuit
Rectifier
Stator (open,
grounded, or
shorted windings)
W/D = Wiring Diagram(s) (Section 7)
I/M = Generator Set Installation Manual
S/S = Generator Set Specification Sheet
* VSC controller settings can be checked and adjusted using the controller user interface or using a personal computer running
SiteTech software.
Figure 4-4 Troubleshooting Chart
TP-6844 1/13
Test
Check for DC voltage on the
generator side of circuit breaker. If
there is DC voltage on the
generator side of the breaker, then
a problem in the load circuits is
causing the line circuit breaker to
trip.
Perform alternator
troubleshooting, Section 5.2.
Check the controller settings.
Troubleshoot the controller as
described in Section 4.10.
Check wiring.
Perform rectifier troubleshooting,
Section 5.3.
Check voltage and continuity as
described in Section 5.3.
Engine S/M = Engine Service Manual
O/M = Generator Set Operation Manual
Corrective Action
Check for and correct short circuits
or overloading on the load side
before resetting the circuit
breaker.
Make repairs based on results
from alternator troubleshooting,
Section 5.2.
Adjust controller settings.
See Section 4.10.
Replace wiring as necessary.
Make repairs based on rectifier
troubleshooting, Section 5.3.
Repair or replace the stator if
indicated by the test results.
Section 4 Troubleshooting
Reference
—
Section 5.2
Section 3.3
Section 4.10
W/D Section 7
Section 5.3
Section 5.3
63