TM 9-6115-604-34
NAVFAC P-8-633-34
Table 2-4. Electrical Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4.
GENERATOR G1 PRODUCES LOW VOLTAGE.
Troubleshoot in accordance with MALFUNCTION 3, above.
Correct as specified.
5.
GENERATOR G1 PRODUCES HIGH VOLTAGE.
WARNING
Lethal static charges may be on generator G1 lines T1, T2, T3, L1, L2, or L3 when generator
set is shut down. Using an Insulated (fiberglass) rod with a ground metal tip, discharge
generator leads to ground prior to working on them.
Step 1.
Shut down generator set. Remove rear panel to Cabinet B. Refer to Figure 10-3. Discharge
generator G1 leads T1, T2, T3, L1, L2, and L3 to ground using an insulated (fiberglass) rod with
grounded metal tip.
Step 2.
Troubleshoot in accordance with MALFUNCTION 3, steps 3-5 above.
Correct as specified.
6.
GENERATOR G1 VOLTAGE FLUCTUATES,
Step 1.
Adjust stability of voltage regulator VR101 by adjusting rheostat VR101R11 clockwise for increased
stability.
If voltage regulator VR101 cannot be adjusted, test in accordance with paragraph 5i 3. Repair or
replace as necessary.
Step 2.
Adjust OPERATION POINT ADJUSTMENT on CURRENT BOOST SYSTEM A101 clockwise.
If problem persists, troubleshoot in accordance with MALFUNCTION 1, above.
Step 3.
Check parallel cable assemblies in accordance with the Operator and Organizational Maintenance
Manual. Repair or replace as necessary.
7.
GENERATOR G1 VOLTAGE RECOVERY SLOW WITH LOAD CHANGES.
Step 1.
Adjust stability of voltage regulator VR101 by adjusting rheostat VR101R11 counterclockwise to
decrease response time to load changes.
If voltage regulator VR101 cannot be adjusted, go to Step 3, below.
Step 2.
Adjust OPERATION POINT ADJUSTMENT on CURRENT BOOST SYSTEM Al01 counter
clockwise.
If adjustment cannot be made, go to Step 3, below.
Step 3.
Test voltage regulator VR101 in accordance with paragraph 5-13.
If voltage regulator passes bench test, but fails on equipment test, replace CURRENT BOOST
SYSTEM Al 01.
2-17
