Marathon Electric DVR 2000E+ - Page 48

48
Marathon Electric (a division of RBC Manufacturing Corp.) reserves the right to change specications and this manual without notice.
Revised 06/2011
Step 9. Low generator output voltage may occur when the regulator input is being influenced by the UP and
DOWN contacts. Refer to Section 3 – Features and Protection for more information about the UP and
DOWN contacts.
If the low voltage condition is not caused by the UP and DOWN contacts, proceed to Step 10.
Step 10. Further system troubleshooting may be required. If it is determined that the rest of the system is not the
source of the problem, the DVR
®
2000E+ may need to be replaced.
High Generator Output Voltage
Step1. Verifythatthevoltageadjustmentisnotsettoohigh.
  Ifthevoltageadjustmentistoohigh,adjustittothecorrectsetpoint.
  Ifthevoltageadjustmentiscorrect,proceedtoStep2.
Step 2. Verify that the sensing potential transformer (if used) has the correct turns ratio.
If the turns ratio of the sensing potential transformer is incorrect, replace the sensing potential
transformer with the correct one.
If the sensing potential transformer is correct, proceed to Step 3.
Step 3. High generator output voltage may occur when operating in droop mode with a capacitive load. Refer
to Section 3 – Features and Protection for more information about the Load Sharing function.
If the high voltage condition is not caused by the droop function, proceed to Step 4.
Step 4. Further system troubleshooting may be required. If it is determined that the rest of the system is not the
source of the problem, the DVR
®
2000E+ may need to be replaced.
Poor Voltage Regulation
Step 1. Verify that the DVR
®
2000E+ Frame Size is set to the proper generator frame.
If the Frame Size setting is incorrect, re-enter the proper frame size.
If the Frame Size setting is correct, proceed to Step 4.
Step 2. Verify that the ground terminal of the DVR
®
2000E+ is properly grounded.
If the DVR
®
2000E+ is not properly grounded, connect a dedicated ground wire to the quarter-inch fast-
on connector labeled GND on the rear of the DVR
®
2000E+ case.
If the DVR
®
2000E+ is properly grounded, proceed to Step 3.
Step 3. Check for grounded field leads.
If the field leads are grounded, isolate them from ground.
If the field leads are not grounded, proceed to Step 4.
Step 4. Check for grounded PMG leads.
If the PMG leads are grounded, isolate them from ground.
If the PMG leads are not grounded, proceed to Step 5.