ARMY TM 9-6115-643-10
AIR FORCE TO 35C2-3-445-21
TABLE 3-1. Troubleshooting - Continued
TEST OR INSPECTION
SYNCHRONIZING LIGHTS fail to light.
Check that parallel cable is connected.
Check PARALLEL UNIT switch.
Place PARALLEL UNIT switch in correct position.
SYNCHRONIZING LIGHTS on generator set No. 2 do not glow bright and
dark in unison during parallel operation.
Check that load cables are connected properly.
For proper connection of load cables, refer to para-
Ensure FREQUENCY SELECT switches are in correct
Frequency must be the same on both generator sets
AC CIRCUIT INTERRUPTER light fails to come on generator set No. 2
in parallel operation.
Test light by depressing. If light fails to light, notify next higher
maintenance level. If light comes on, go to Step 2.
FREQUENCY adjust potentiometer is not properly adjusted.
Set FREQUENCY adjust potentiometer.
No voltage at the Convenience Receptacle.
Open control panel and inspect circuit breaker on side
of Ground Fault Circuit Interrupter device.
If tripped, reset device. Check fuse on black wire
of Ground Fault Circuit Interrupter for generator
sets, contract number DAAK01-88-D-D082.
Check reset button for red band.
If red band is visible, push reset button. If Ground
Fault Circuit Interrupter can not be reset, refer to
next higher maintenance level.