TM9-4120-370-14
TO35E9-229-1
Preliminary procedure:
Remove junction box cover. (See para 4-46.)
Inspection
a.
(1) Check that mounting hardware on push-pull (reset) control and circuit breaker is in place and secure.
(2) Check that wire leads are properly connected to circuit breaker and are not damaged.
(3) Check circuit breaker for signs of overheating or other visible damage.
b.
Test
(1)
Disconnect P1O, P4, P14, P13, and P21 junction box connectors.
(2)
Set circuit breaker reset bar in OFF position.
(3)
Use Multimeter set on lowest OHMS scale to check continuity between terminals Al and A2, B1 and B2,
Cl and C2, and auxiliary switch terminals C and NO. All contacts should be open, If there is continuity on
any check, replace circuit breaker.
Press reset bar toward the OFF stop then place it in the ON position.
(4)
Use a Multimeter set on the lowest OHMS scale and repeat continuity checks between terminals A1 and
(5)
A2, B1 and 62, C1 and C2, and auxiliary switch terminals C and NO. All four contacts should be closed.
If there is no continuity on any check, replace circuit breaker.
Reconnect P1O, P4, P14, P13, and P21 junction box connectors.
(6)
