Testing live electrical circuits. Hazardous voltage or current will cause severe injury or death. Have trained and qualified
personnel take diagnostic measurements of live circuits. Use adequately rated test equipment with electrically insulated probes
and follow the instructions of the test equipment manufacturer when performing voltage tests. Observe the following precautions
when performing voltage tests: (1) Remove all jewelry. (2) Stand on a dry, approved electrically insulated mat. (3) Do not touch
the enclosure or components inside the enclosure. (4) Be prepared for the system to operate automatically. (600 volts and under)
Short circuits. Hazardous voltage/current will cause severe injury or death. Short circuits can cause bodily injury and/or
equipment damage. Do not contact electrical connections with tools or jewelry while making adjustments or repairs. Remove all
jewelry before servicing the equipment.
Correct voltage calibration is necessary for proper generator set operation. Check the voltage calibration after controller
replacement or generator set reconnection, and adjust if necessary.
The RDC2 controller can be calibrated using the controller keypad and menus, or using a personal computer with Kohler
®
SiteTech
™
software.
7.5.1 Calibration using the RDC2 Controller Keypad and Menus
The controller’s voltage calibration can be adjusted using the controller keypad. See Figure 44 and follow the procedure below.
Note:
A digital voltmeter is required for these adjustments.
1. With the generator set off, connect a digital multimeter to measure output voltage across L1 and L2. Set the meter to
measure AC volts.
2. Start the generator set by pressing the RUN button on the RDC2 controller.
3. On the RDC2 controller, press the Select button and then use the arrow buttons to navigate to the Generator Metering menu
on the RDC2 controller.
4. Press the Select button to display Volts L1-L2. Compare the number displayed with the voltmeter reading.
5. If the correct voltage is not displayed, follow these steps to adjust it:
a. Press the Select button. The voltage will flash.
b. Press the up or down arrow button to adjust the voltage to match the voltmeter reading.
c. Press Select to save the voltage setting. The voltage stops flashing.
d. Wait for the voltmeter reading to stabilize. This may take 30 to 60 seconds.
6. For three-phase models, press the Down arrow button and repeat the calibration procedure for voltage across L2- L3 and
L3- L1.
7. Use the arrow buttons to step down to the Return screen. Press Select to exit the Generator Metering menu.
8. Press OFF to stop the generator set.
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