Table 2-9. Electrical System Troubleshooting (CONT).
TEST OR INSPECTION
4. ONE OR MORE FIXED SHELTER LIGHTS ARE INOPERABLE.
Ensure FRS 120/208 VAC electrical system is functioning properly.
Ensure FRS generator is started (TM 9-4940-568-10) for all voltage checks.
Check condition of light bulb.
If light bulb is faulty, replace bulb (Para 3-10). If light bulb is good, go to next test.
Check that circuit breaker #8 (1) inside 120/208 main panel (2) is not tripped.
If circuit breaker is not tripped, go to next test. If circuit breaker is tripped, attempt to reset
circuit breaker. If circuit breaker will not reset, Notify Supervisor.
Remove fixed light assembly from junction box and check for voltage across terminals.
If voltage is present, replace light fixture socket (Para 3-10). If voltage is not present,
install light assembly in junction box and go to next test.
Remove shelter light switch and check for voltage across input terminals of each switch (Para 3-8).
If voltage is present, go to next test. If voltage is not present, Notify Supervisor.
Check for voltage across output terminals of each switch.
If voltage is present, repair or replace wire from switch to shelter switch (see schematic
Figure 2-4). If voltage is not present, replace switch (Para 3-8).