Kohler 15CCO Service Manual page 89

1. Voltage Regulator
Figure 7-5. PowerBoostä IIIE
Voltage Regulator Installed
NOTE A
A customer-provided rheostat may be connected
across regulator leads/terminals 33 and 66 to adjust
generator output voltage from a location remote from
the set. The rheostat (10k ohms, 1/2-watt minimum) will
provide a 5-volt adjustment range.
Voltage Adjustment Pot- -Adjusts generator output
within range of approx. 100--130 Volts.
Stabilizer Pot- -Fine-tunes regulator circuitry to reduce
light flicker.
Volts/Hz Pot- -Adjustment determines engine speed
(Hz) at which generator output voltage will begin to drop.
TP-5606 6/02
The 15/20CCO generator sets have the Volts/Hz feature
disabled by turning the Volts/Hz pot out (fully
counterclockwise).
For optimum results, full load should be applied when
adjusting stability pot.
1
1-933
NOTE
1. With generator set off, turn remote rheostat (if
equipped) to midpoint. Turn Voltage and
Stability pots fully counterclockwise. Connect
voltmeter and frequency meter to AC circuit or an
electrical outlet.
2. Start generator set. Rotate voltage adjustment
pot clockwise
(counterclockwise to decrease voltage) until
desired output voltage is achieved.
3. Rotate stability pot clockwise until minimum light
flicker is obtained.
4. Readjust voltage adjustment pot (if necessary).
5. Readjust engine speed to normal (1800 rpm for 60
Hz or 1500 rpm for 50 Hz).
6. Readjust voltage adjustment pot (if necessary).
7. Readjust stability pot (if necessary).
8. Use optional remote rheostat (if equipped) to
make final voltage
GENERATOR SET.
Component Testing and Adjustment 7-7
to increase voltage
adjustments. STOP