TM 9-6115-729-24
0010
TROUBLESHOOTING USING DVR FAULT CODES - Continued
CORRECTIVE ACTION - Continued
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.
STEP 12.
Voltages should be the same and at the proper ratio to the output voltage in
accordance with parameter :02. If not, test generator (WP 0096).
STEP 13.
If the problem is not resolved, replace DVR (WP 0041).
STEP 14.
Verify the problem is resolved.
NOTE
The DVR detected that the generator voltage has been more than the overvoltage trip point
(parameter :11) for more than the amount of time specified by the overvoltage trip time
(parameter :12).
SYMPTOM
7.
Code 702
MALFUNCTION
Overvoltage
CORRECTIVE ACTION
STEP 1.
Adjust VOLTAGE adjust potentiometer on control panel counterclockwise to
reduce voltage.
STEP 2.
If paralleled to other generator sets, check voltage setting on other sets.
STEP 3.
Start generator set and verify that problem has been resolved.
0010-6
