CIRCUIT BREAKER ASSEMBLY MAINTENANCE

TM 9-4120-430-14

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UNIT MAINTENANCE

AIR CONDITIONER, COMPACT, HORIZONTAL

CIRCUIT BREAKER ASSEMBLY MAINTENANCE

REMOVAL, INSPECTION, TEST, REPAIR, AND INSTALLATION

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanics (Item 1, Table 2, WP 0067 00)

Materials/Parts

Solder (Item 2, WP 0069 00)

Flux (Item 2, WP 0069 00)

Heat Gun (Item 6, WP 0069 00)

Test Equipment

Multimeter

References

Wire Lists and Schematic Diagram (WP 0038 00)

Personnel Required

One

Equipment Condition

Top cover removed (WP 0018 00)

WARNING

Ensure power source is disconnected.

NOTE

Work package procedures apply to either the three pole circuit breaker assembly (S9160-

18KW-3 unit) or the two pole circuit breaker assembly (S9150-18KW-1 unit).

REMOVAL

1. Remove four screws (1) from housing rivet nuts (2) that secure the circuit breaker mounting bracket (3 or 4) to the

rear of the unit housing (5). See figure 1.

2. Pull the circuit breaker assembly away from the housing.

INSPECTION

Circuit Breaker (9 or 10)

1. Inspect toggle for chips, creaks, or damage. Replace circuit breaker if found.

2. Inspect wiring for breaks or damage. Replace if found.

3. Inspect for distinct click and engagement of circuit breaker when placed in ON position. Replace if not found.

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