1. 8.6 ADC 2100 Adjustment after 8.6.3 Setting the System Voltage and
Reconnection Frequency
(6EOD/4.5EFOD and Follow the instructions in Figure 8-19 to enter the
8--32EOZD/6.5-
-27EFOZD configuration mode while the engine is not running and
select the new voltage and frequency setting. The
Models) settings are shown in Figure 8-20. An X in the Display
The controller is factory-set for the generator set voltage column in Figure 8-19 indicates a number from 0 to 9.
and frequency. If the generator set is reconnected to a
Press the Select button to step through to the Save
different voltage and frequency, follow the procedures in
mode as shown in Figure 8-19. Do not change any other
this section to reconfigure the controller to the new
parameters. If any other parameters are changed
voltage and/or frequency. Set the system voltage and
inadvertently while navigating the controller menus,
frequency and then adjust the voltage, gain, and engine
reset them to the settings shown in Figure 8-20 and then
speed.
save the settings. When SAVE is displayed, press the
up arrow to save the new settings or the down arrow to
8.6.1 Configuration Mode Time Out discard the changes and exit the configuration mode
without saving.
The controller will automatically exit the configuration
mode without saving any changes after about Pressing the Select button when SAVE is displayed
11 seconds if no buttons are pressed. Start the returns to the first parameter, system voltage/frequency
configuration procedure over again from the beginning if (Uu).
the controller exits the configuration mode before the
settings have been saved.
8.6.2 Controller Software Version
Number
The application software for controller operation is
factory-loaded onto the Advanced Digital Control. At
times, it may be necessary to check the software version
number for troubleshooting purposes.
The controller’s application software version number is
displayed on the LED screen during the key sequence to
enter the configuration mode, after the Select button has
been pressed and held for about five seconds. For
example, 01.00 will be displayed for software
version 1.00.
Note: The engine type (EC) and the engine data input
type (ED) are factory set and should only be
changed by an authorized Kohler
dealer/distributor. Incorrect settings will make
your unit non-functional.
108 Section 8 Reconnection/Adjustments TP-6253 3/07

2. 8.6.4 Adjusting the Voltage, Gain, and 3. Use the ADC controller to adjust the voltage
Volts/Hz, and Engine Speed (parameter 1P) until the output voltage reaches the
desired value. See Figure 8-21.
After setting the system voltage and frequency, check
the output voltage and frequency and adjust, if Approximate
necessary, using the following procedures. Follow the Voltage Change per Step, VAC
Measured
instructions in Figure 8-26 and Figure 8-27 to adjust the Voltage, VAC Coarse Adjust Fine Adjust
voltage, gain, volts/Hz, and governor gain while the 85--132 5 0.5
engine is running. An X in the Display column in 180--251 7 0.7
Figure 8-26 and Figure 8-27 indicates a number from 0
Figure 8-21 Voltage Adjustment
to 9. Use the up arrow to increase a setting or the down
arrow to decrease the setting. 4. Adjust the voltage stability (gain, parameter 2P) to
minimize light flicker.
Pressing the Select button when SAVE is displayed
returns to the first parameter, voltage adjust (1P). 5. Readjust the voltage, if necessary.
Note: A digital multimeter that measures voltage and
Volts per Hertz (Hz) Adjustments
frequency is required for these adjustments.
The cut-in frequency is pre-set for 58 Hz (60 Hz system)
8.6.5 Voltage Adjustment or 48 Hz (50 Hz system). When the frequency falls
below the cut-in, output voltage is reduced to relieve the
engine. The amount of the voltage reduced is set by the
WARNING 3P parameter. Monitor engine speed and output voltage
as loads are applied.
D If there is excessive droop in engine speed and little
droop in voltage, increase the 3P value.
Hazardous voltage. Moving rotor.
Can cause severe injury or death. D If there is little engine speed droop but excessive
voltage droop, decrease the 3P value.
Operate the generator set only when
all guards and electrical enclosures The amount of voltage droop is approximately 0.5% of
are in place.
system voltage for each step of 3P, including each cycle
(Hz) below the cut-in frequency.
Short circuits. Hazardous voltage/current can cause
severe injury or death. Short circuits can cause bodily injury
and/or equipment damage. Do not contact electrical Voltage Droop for Each Engine
connections with tools or jewelry while making adjustments or 3P Below Cut-in Frequency
repairs. Remove all jewelry before servicing the equipment. 0 0
1 0.5%
Grounding electrical equipment. Hazardous voltage can
2 1.0%
cause severe injury or death. Electrocution is possible
whenever electricity is present. Turn off the main circuit 3 1.5%
breakers of all power sources before servicing the equipment. 4 2.0%
Configure the installation to electrically ground the generator 5 2.5%
set, transfer switch, and related equipment and electrical 6 3.0%
circuits to comply with applicable codes and standards. Never 7 3.5%
contact electrical leads or appliances when standing in water 8 4.0%
or on wet ground because these conditions increase the risk of 9 4.5%
electrocution.
Figure 8-22 Voltage Droop Adjustments
Voltage Adjustment Procedure 1. Readjust the voltage stability (gain, parameter 2P),
1. With the generator set off, connect a digital if necessary.
voltmeter to the output leads or an electrical outlet
2. Readjust the voltage (parameter 1P), if necessary.
on the load side of the generator set. Set the meter
to measure voltage. 3. Stop the generator set.
2. Start the generator set by moving the generator set
master switch to the RUN position.
TP-6253 3/07 Section 8 Reconnection/Adjustments 111

3. 8.6.6 Frequency Adjustment 3. Adjust the electronic governor speed
(parameter 4P) to obtain a frequency reading of
The engine speed determines the generator output 60 Hz (or 50 Hz on 50 Hz models). Each step
frequency; 60 Hz units operate at 1800 rpm and 50 Hz changes the engine speed about 3.6 RPM, which
units run at 1500 rpm. Adjust the engine governor to changes the output frequency about 0.06 Hz.
change the output frequency using the following
procedure. 4. Check stability with the generator set running and
with no load applied. If the generator set speed is
unstable, hunts, or surges, adjust the governor
Frequency Adjustment Procedure
stability (gain, parameter 5P) until the generator
1. Attach a frequency meter to the AC output leads or set becomes stable with no hunting or surging.
an electrical outlet on the load side of the generator (Increasing the gain slows the governor response.)
set.
5. Check the frequency reading. Repeat steps 3 and
2. Start and run the generator set until it reaches 4 if necessary to obtain the rated frequency and
normal operating temperature (at least 10 minutes). stable operation.
112 Section 8 Reconnection/Adjustments TP-6253 3/07