Kohler EKOZD Series Service page 193

3. Observe the AC output voltage controller display or
connect a voltmeter to the output leads. High AC
output voltage indicates the FRX activator board is
functioning properly. The fault is likely in the wiring,
controller with voltage regulator, or LED optic
board as the output voltage should drop to low level
when the flashlight is removed. If no output is
observed, check the FRX activator board.
4. If high output voltage exists with the flashlight off,
stop the generator set and place a small piece of
black electrical tape over the photo transistor.
Restart the unit.
If the output voltage is reduced, there is a source of
external light contamination. STOP the generator
set. Find the external light source and eliminate it
or block it from reaching the photo transistor.
If the output voltage remains high, there is a failure
in the FRX activator board.
TP-6953 7/19
5. With the generator set running at no load,
approximately 1- 2 volts DC should be observed at
3B (+) and 5B (- ) at the LED optic board. See
Figure 11-5.
6. Shine the flashlight on the photo transistor. The DC
voltage reading should drop, showing that the
controller with voltage regulator is functioning.
If voltages are not observed, see Section 7.10 for
voltage regulator troubleshooting.
7. STOP the generator set.
TP-6783-3
Figure 11-5 Checking LED Optic Board Voltage
Section 11 Alternator Component Testing and Adjustment
(- )
KEEP P6
CONNECTED
(+)
V
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