INSPECTION - TM-9-4120-428-140138

TM 9-4120-428-14

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INSPECTION

Check the Evaporator Fan Speed Toggle Switch for general condition and loose, broken, or missing terminals.

NOTE

Terminals C1 to C2 and C2 to C3 are not used in single-phase units

TESTING

1. With the Evaporator Fan Speed Toggle Switch in high position (toward keyway), check continuity between terminals A1

to A2, B1 to B2, and C1 to C2. Continuity should be indicated across each pair of terminals.

2. With the Evaporator Fan Speed Toggle Switch in low position (away from keyway) check continuity between terminals

A2 to A3, B2 to B3, and C2 to C3.

REPLACEMENT

Replace the Evaporator Fan Speed Toggle Switch if defective.

INSTALLATION

1. Insert Evaporator Fan Speed Toggle Switch (8) into control panel designation plate (11) and secure with nut (9) and

washer (10).

2. See tags and wiring diagram (Fig. 4-4) and connect the wire leads. Remove tags.

3. Check that the grommets (12) are in place in the shaft holes.

4. Slip the mounting frame (7) in place and align with the three spacer posts (6). Check that the grommets (12) are still in

place in the shaft holes. Secure it with three machine screws (1).

NOTE

FOLLOW-ON MAINTENANCE:

Install control module (WP 0029 00)

END OF WORK PACKAGE

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