Kohler 20EORZD Manual page 33

Troubleshooting Chart, continued
Problem Possible Cause
Light flicker Voltage stability (gain) setting
Incorrect controller configuration
High generator
output voltage p g
Incorrect controller voltage
settings
Engine speed too high
Loose voltage sensing
connections
SCR module
Controller
No output AC output circuit breaker open
voltage
Alternator or control system
Aux. winding fuse blown (lead 55) Replace blown fuse. If fuse blows
SCR module
Controller
TP-6359 7/08
Corrective Action
Check and adjust the voltage
stability (gain) setting using the
ADC 2100.
Check and adjust the controller
configuration parameters.
Check and adjust the controller
voltage settings.
Check the engine speed using
tachometer or frequency meter.
Adjust governor as necessary.
Check connections: stator leads
11 and 44 and P15 controller
connection.
Check the wiring and connections
to the SCR module.
Check the auxiliary winding fuse
F1 (lead 55).
Replace SCR module and test
voltage.
Check fuses, wiring, and
connections. Before replacing the
controller, replace the SCR
module and test voltage.
Check for AC voltage on the
generator side of the circuit
breaker. If there is AC voltage on
the generator side of the breaker,
then a problem in the load circuits
is causing the line circuit breaker
to trip. Check for and correct
short circuits or overloading on
the load side before resetting the
circuit breaker.
Perform separate excitation
procedure to isolate the problem
to the alternator or the control
system. Then troubleshoot the
alternator or control system
components as follows.
again, check stator.
Check auxiliary winding fuse F1
(lead 55).
Replace SCR module and test
voltage.
Check controller settings. Check
wiring and connections. Before
replacing the controller, replace
the SCR module and test voltage.
Reference
Section 7.5.3
Section 7.5
Section 7.5.3
Section 4.5
Section 8.7
Section 7.7
Section 8.11
Section 7.5
Section 7.7
Section 7.11
—
Section 8.2
Section 8.11
Section 8.11
Section 7.7
Section 7.5
Section 7.7
Section 7.11
Section 6 Troubleshooting 33