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TM5-4120-387-14
b.
Inspection
(1) Check that mounting hardware, circuit breaker cover, actuator arm, and
circuit breaker are in place and secure.
(2) Check that wire leads are properly connected to circuit breaker and are
not damaged.
See wiring diagram (fig. 4-7).
(3) Check circuit breaker for signs of overheating or other visible damage.
c .
Test
(1) Set circuit breaker to OFF.
(2) Use multimeter set on lowest OHMS scale to check continuity between
terminals Al and A2, B1 and B2, and auxiliary switch terminals C and NO. All
contacts should be open.
If there is continuity on any check, replace circuit
breaker.
(3) Set reset bar to OFF, then set it to ON.
(4) Use a multimeter set on the lowest OHMS scale and repeat continuity
checks between terminals Al and A2, B1 and B2, and auxiliary switch terminals C
and NO.
All contacts should be closed.
If there is no continuity on any check,
replace circuit breaker.
4-78
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