TM 9-4120-388-14
4-51. COMPRESSOR CIRCUIT BREAKER (CB1).
b. Test
a. Inspection
This task consists of:
d. Installation
c. Removal
INITIAL SET-UP:
Equipment Condition
a. Inspection.
(1) Be sure that mounting hardware, circuit breaker cover, actuator arm, and circuit breaker are in place and
secure.
(2) Be sure that wire leads are properly connected to circuit breaker and are not damaged. (See wiring diagram
(3) Check circuit breaker for signs of overheating or other visible damage.
b. Test.
(1)
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,
(2)
C1 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.
(3)
Use a multimeter set on the lowest OHMS scale and repeat continuity checks between terminals (A1 and
(4)
A2, B1 and B2, 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.
4-97