INSPECTION - TM-5-4120-393-140153

TM 5-4120-393-14

4-42. Circuit Breaker (CB) (cont)

INSPECTION

Check that mounting hardware on push-pull (reset) control and circuit breaker is in place and secure. (See para 4-

Check that wire leads are properly connected to circuit breaker and are not damaged.

Check circuit breaker for signs of overheating and/or other visible damage.

TESTING

NOTE

Steps 1 and 6 apply if circuit breaker (CB) not removed.

Disconnect junction box connectors P22, P14, P10, P4, and P13.

Set circuit breaker reset bar in OFF position.

Use multimeter set on lowest OHMS scale to check continuity between terminals A1 and A2, B1 and B2, and C1 and

C2, and terminals 5 and 3. All contacts should be open If there is continuity on any check, replace the circuit breaker.

Press reset bar toward the OFF stop, then place it in the ON position.

Use multimeter set on lowest OHMS scale to repeat continuity checks between terminals A1 and A2, B1 and B2, and

C1 and C2, and terminals 5 and 3. All contacts should be closed. If there is no continuity on any check, replace the

circuit breaker.

Reconnect P13, P4, P10, P14, and P22 junction box connectors.

INSTALLATION

Using pliers, pull shaft that holds reset toggles together on circuit breaker.

Place circuit breaker, actuator arm, and cover into position and reinsert reset toggle shaft.

Using screwdriver, secure circuit breaker (7) and cover (6) with six screws (3), flat washers (5), and lock washers (4).

Check that circuit breaker reset knob on rear of air conditioner is pushed in all the way.

Using tags and wiring diagram, para 4-13, connect leads.

Remove tags.

Using screwdriver, install junction box cover (2) with four screws (1).

4-101