CONTROL CIRCUIT BREAKER CB2 INSPECTION, TESTING, AND REPLACEMENT

TM 9-4120-428-14

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UNIT MAINTENANCE

AIR CONDITIONER, HORIZONTAL, COMPACT

(NSN 4120-01-502-1319)

CONTROL CIRCUIT BREAKER CB2 INSPECTION, TESTING, AND REPLACEMENT

INITIAL SETUP:

Tools

Materials/Parts

Refrigeration Unit Service Tool Kit, WP 0000 00, Item

Control Circuit Breaker

Lock Washer

Lock Washers (2)

Equipment Condition

Remove Top Front Panel (WP 0019 00)

LINE

LOAD

CIRCUIT BREAKER DIAGRAM

INSPECTION

Check the Circuit Breaker for general condition and loose, broken, or missing terminals.

TESTING

1. Check for continuity between the two terminals 1 and 2 with the circuit breaker in the ON position.

2. Check for no continuity between terminals with the circuit breaker in the OFF position.

REPLACEMENT

1. Remove the attaching nut (1) and lock washer (2) from the front panel.

2. Slip circuit breaker (3) from the back of the panel.

3. Tag and disconnect all wire leads.

4. See Figure 4 -4, Wiring Diagram. Connect all the wire leads and remove tags.

5. Slip the circuit breaker (3) into the hole in the panel.

6. Secure with a nut (1) and lock washer (2).

NOTE

FOLLOW-ON MAINTENANCE:

Install Top Front Panel (WP 0019 00)

END OF WORK PACKAGE

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