TM 9-4940-568-20
2-82
Table 2-9. Electrical System Troubleshooting (CONT).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. NO CRANE POWER FROM SHELTER (CONT).
3
4
4
Open 24 VDC panel cover (3) (Para 3-3) and check for voltage on output side of terminal block position 88 and a
known good ground.
If voltage is present, repair or replace wire from 24 VDC panel to junction box on outside
rear of shelter (see schematic Figure 2-5). If voltage is not present, go to next test.
Check for voltage between output terminal of circuit breaker #1 (4) and a known good ground.
If voltage is present, repair or replace wire from circuit breaker #1 to input side of terminal
block position 88 (see schematic Figure 2-5). If voltage is not present, go to next test.
Check for voltage between input terminal of circuit breaker #1 (4) and a known good ground.
If voltage is present, replace circuit breaker #1 (Para 3-3). If voltage is not present, go to
next test.
Check for voltage between input terminal block position #24 and a known good ground.
If voltage is present, repair or replace wire from output terminal block position #24 and
circuit breaker #1. If voltage is not present, repair or replace 24 VDC power wire from
generator main circuit panel (see schematic Figure 2-5).
