TM 9-6115-730-24
0010
TROUBLESHOOTING USING DVR FAULT CODES - Continued
NOTE
The DVR detected that the generator voltage has been less than the undervoltage trip point
(parameter :13) for more than the amount of time specified by the undervoltage trip time
(parameter :14). This alarm is disabled during the start-up profile.
SYMPTOM
6.
Code 701
MALFUNCTION
Undervoltage.
CORRECTIVE ACTION
STEP 1.
Adjust VOLTAGE Adjust Potentiometer on control panel clockwise to increase
voltage.
STEP 2.
If paralleled to other generator sets, check VOLTAGE adjust setting on each set.
STEP 3.
Start generator set and verify that problem has been resolved.
STEP 4.
If problem is not resolved, perform Voltage Adjust Potentiometer test (WP 0041).
STEP 5.
Measure battery voltage at B+ and B- terminals on DVR per FO-4, sheet 3.
Voltage should be 18 to 32 Vdc.
STEP 6.
Verify that correct DVR parameters are entered (WP 0083) and that parameters
match the reconnection board position (WP 0014). Enter proper parameters
STEP 7.
With generator set running, measure AC voltage between pins A3-26 and A3-28,
A3-28 and A3-30, and A3-26 and A3-30 per FO-4, sheet 3.
STEP 8.
If voltages are not between 95 to 120 Vac at all three locations, shut down
generator set.
STEP 9.
Check fuses F1-10A, F2-10A, F3-10A and replace defective fuses.
a. Open fuse holder F1, F2, and F3.
b. Check resistance, F1-1 to F2-1, F2-1 to F3-1, and F3-1 to F1-1. Resistance
should be less than 1 ohm. If open or above 1 ohm, troubleshoot wires
between F12, F2, and F3 to TB1 and alternator.
c.
Check resistance, F1-2 to F2-2, F2-2 to F3-2, and F3-2 to F1-1. Resistance
should be between 0.2 to 0.4 ohms. If open or above 0.4 ohms, troubleshoot
wires between F12, F2, and F3 and transformer PT2 and PT3, and
transformer primary winding, PT2, PT3 before removing wires from A3-26,
A3-28, and A3-30.
STEP 10.
Check resistance, A3-26 to a3-28; A3-28 to A3-30, and A3-30 to A3-26.
Resistance should be between 0.2 and 2.0 ohms. If open or above 2 ohms,
troubleshoot secondary winding of PT2 and PT3 and wires between A3-26, A3-
28 and A3-30 to PT2 and PT3.
STEP 11.
Measure AC voltage between pins A3-20 and A3-22, A3-22 and A3-24, and
A3-20 and A3-24.
0010-6
