Adjustment Procedure - Kohler 15CCO Service Manual

LED 1
1 2
STAB
V/HZ VOLTS
LED 3
NOTE
The voltage regulator is located in the generator junction
box and is serviceable by removing four screws.
1. Stability Pot- - "Fine-tunes" regulator to reduce light
flicker.
2. Volts/Hz Pot- -Adjustment determines engine speed
(Hz) at which generator output voltage will begin to drop.
3. Voltage Adjustment Pot- -Adjusts generator output
within range of 190--270 Volts (line-to-line).
Figure 7-9. PowerBoostä V Adjustments
WARNING
Hazardous voltage.
Can cause severe injury or death.
Operate the generator set only when
all guards and electrical enclosures
are in place.
TP-5606 6/02
LED 2
3
Moving rotor.
Hazardous voltage can cause severe injury or
death. Short circuits can cause bodily injury and/or
equipment damage.
connections with tools or jewelry while adjustments are
made. Remove wristwatch, rings, and jewelry that can
cause short circuits.
Hazardous voltage can cause severe injury or
death. The heat sink of the voltage regulator contains
high voltage. Do not touch voltage regulator heat sink
when testing or electrical shock will occur.

Adjustment Procedure

1. Turn Voltage, Volts/Hz, and Stability pots fully
counterclockwise. Connect voltmeter to AC circuit
or an electrical outlet.
2. Start generator set. Rotate Voltage Adjustment
pot clockwise
counterclockwise (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. Mechanical Governor:
Adjust engine speed to desired cut-in frequency
(factory setting 57.5--58 Hz for 60 Hz models or
47.5--48 Hz for 50 Hz models) as measured on
frequency meter. See Section 3. Governor.
6. Rotate Volts/Hz Adjustment pot clockwise until
voltage level begins to drop (as measured on
voltmeter). When set to these specifications, the
generator will attempt to maintain normal output
until engine speed drops below the frequency set
in step 5 (as load is applied).
7. Mechanical Governor:
Readjust engine speed to normal (63 Hz/1890
rpm for 60 Hz or 52.5 Hz/1575 rpm for 50 Hz). See
Section 3. Governor.
8. Readjust Voltage Adjustment pot (if necessary).
9. Readjust Stability pot (if necessary).
10. STOP GENERATOR SET.
Component Testing and Adjustment 7-11
Do not contact electrical
(increase voltage) or